CN216240178U - Lock capable of preventing child from opening - Google Patents

Abstract

The lock comprises a lock head part, a fixed seat and a connecting belt, wherein the lock head part comprises a lock seat and a lock body, the lock body comprises a lock shell and a bottom plate, the bottom plate is clamped at the bottom end of the lock shell, side notches are formed in two sides of the lock shell, sliding fasteners with buckles are respectively installed in an inner cavity of the lock, and a compression spring is arranged between the sliding fasteners on the two sides; the small lock cylinder is positioned between the sliding fasteners at the two sides; the top of the lock shell is provided with a top round hole and a rotary connecting piece, the rotary connecting piece comprises a driving round cap and a connecting rod, and the connecting rod is inserted into the top round hole and is fixedly connected with the small lock cylinder; the driving round cap is fixedly connected with the trip piece; the bottom plate is provided with a bottom plate notch, and a retaining ring is arranged on the lock seat; when the small lock core rotates to the clamping position, the sliding fasteners on the two sides are propped against to move inwards; when the small lock core rotates to a non-blocking position, the sliding fasteners on the two sides can be pressed simultaneously to unlock; can effectively prevent the infant from opening the bottle.

Description

Lock capable of preventing child from opening

Technical Field

The utility model relates to a lock for preventing children from opening; the lockset for preventing children from opening is particularly suitable for cabinet doors, refrigerator doors, drawers and the like.

Background

Preventing the children from being hurt by themselves by mistake, and is very important for families with the children. The child is curious and active in nature, and the child is also required for the growth of the body and the development of intelligence. But infants do not have the ability to discern many dangerous behaviors, especially for children under 4 years of age. Even if an adult attends, the child is usually unlikely to pay attention to the behavior all the time, the child often makes some unexpected behaviors which may cause self-error injury, furniture such as cabinet doors, refrigerator doors, drawers and toilet covers are opened, the child touches or mistakenly swallows the articles which may cause the injury to the child, and a lock for preventing the child from being opened is arranged at the furniture opening position for storing the articles which may cause the injury to the child. Along with the improvement of the requirements of modern people on living quality, the lockset for preventing the children from unlocking is used as an accessory of modern furniture, and besides the basic function of preventing the children from unlocking, the lockset is required to have a light structure, attractive and elegant appearance, convenient installation and use and environmental friendliness because the lockset is not an anti-theft lock.

The existing lock for preventing children from unlocking in the prior art is usually provided with a button for unlocking the lock, and the lock can be unlocked only by pressing the button; for example, chinese patent document CN 202810431U discloses a multi-purpose child safety lock. This does not effectively prevent the child from opening. The lock can be opened by one pressing action, and under the condition that an infant is carelessly pressed, the lock can be opened unconsciously by the infant, so that the infant can be injured. In addition, the lockset capable of preventing the child from opening in the prior art also has the problems of not light and handy structure, not beautiful and elegant appearance, not convenient installation and use, not environment-friendly property and the like.

The CN201721048599.1 filed by the applicant 2017-08-21 is named as a lock for preventing children from opening, and the authorization notice number is CN 207212062U, and discloses a lock for preventing children from opening, which can be opened only by two continuous actions. The product provided according to the scheme stops the situation that the product is opened unconsciously and disorderly by children to a great extent, but when the product is unlocked, the knob piece 20 needs to be rotated to the position that the small lock cylinder 13 is at the opening position, and then the sliding fasteners 7 at the two sides are pressed to unlock by overcoming the elasticity of the compression spring; in order to facilitate the twisting of fingers, the knob piece cannot be too small and needs to be obviously protruded, the knob piece is more conspicuously protruded, the condition that the knob piece is unintentionally opened by a child with a small probability exists, and the product is not beautiful enough due to the obviously protruded knob piece. In addition, according to the product provided by the scheme, the connecting band 4 is fixedly connected with the fixed seat 60, and the base 28 and the cover block 29 of the fixed seat 60 are also fixedly connected, so that the lock body 2 in the unlocking state and the connecting band 4 cannot rotate; thus, when the lock is mounted on a vertical surface, it is only horizontal in the unlocked state and thus visually impaired, and cannot be rotated to a position facing down the wall.

The application is a further improvement on the basis of the scheme disclosed in CN 207212062U.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a lock which can be opened only by three continuous actions and is prevented from being opened by children aiming at the technical current situation. The window can be prevented from being opened unconsciously by children. The present invention further provides a cover block of a fixing base, which can rotate relative to a base thereof, and when a lock is installed on a vertical surface, the lock can be rotated to a state of being downward along a wall in an unlocking state.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a lock for preventing children from opening comprises a lock head component, a fixed seat and a flexible connecting band fixedly connected between the lock head component and the fixed seat, and is characterized in that the lock head component comprises a lock seat and a lock body which can be locked or separated with each other, the lock body comprises a lock shell and a bottom plate, the lock shell is a top shell, and the bottom plate is clamped at the bottom end of the lock shell to form a lock inner cavity; side notches are respectively formed in two sides of the lock shell, sliding fasteners capable of moving along the direction of the notches in the two sides are respectively installed in the opposite positions of the side notches in the inner cavity of the lock, a buckle is arranged on each sliding fastener, and a compression spring is arranged between the sliding fasteners in the two sides to enable the sliding fasteners to protrude outwards; a small rotatable lock cylinder is also arranged in the lock cavity and is positioned between the sliding fasteners at the two sides; the top of the lock shell is provided with a top round hole and is provided with a rotary connecting piece, the rotary connecting piece comprises a driving round cap and a connecting rod, the driving round cap is positioned on the lock shell, and the connecting rod is inserted into the top round hole and is fixedly connected with the small lock cylinder; the driving round cap is fixedly connected with a wrenching piece which can be wrenched from the side edge of the driving round cap and can twist the rotating connecting piece and the small lock cylinder to rotate; the bottom plate is provided with a bottom plate notch in a buckle sliding area of the sliding fastener, and a buckle ring which is suitable for penetrating through the bottom plate notch and is buckled with the buckle of the sliding fastener is arranged on the lock seat; when the small lock core rotates to the clamping position, the sliding fasteners on the two sides are propped against to move inwards; when the small lock core rotates to a non-blocking position, the sliding fasteners on two sides can be pressed simultaneously to overcome the elastic force of the compression spring to move inwards to unlock.

Further embodiments are provided below.

2 rectangular frames are symmetrically arranged on the bottom plate, small gaps are formed in two ends of each rectangular frame, and the compression springs are placed in the rectangular frames; the sliding fastener is provided with a fastener gap, sliding blocks which are suitable for sliding between 2 rectangular frames symmetrically arranged on the bottom plate are formed on the inner side of the gap in an entity, and the sliding blocks are provided with the fasteners on the inner side of the fastener gap; the entity at the inner side of the notch of the fastener is respectively provided with an extending block which is suitable for being embedded into the small notches at the two ends of the rectangular frame at the two sides of the sliding block; after the installation, the sliding block slides between 2 rectangle frames that the symmetry set up on the bottom plate, stretch out the piece and imbed the little breach in rectangle frame both ends respectively to keep off at compression spring's both ends.

The small lock cylinder is cylindrical, arc-shaped convex ribs are symmetrically arranged on two sides of the outer surface of the cylinder, and the arc-shaped convex ribs are positioned right opposite to the sliding fasteners on the two sides and prop the sliding fasteners on the two sides to move inwards; when the arc convex rib is not aligned with the sliding fasteners at the two sides, the sliding fasteners at the two sides can be pressed simultaneously to overcome the elastic force of the compression spring to move inwards to unlock.

The inner side of the sliding block is a concave arc surface, and the concave arc surface on the inner side of the sliding block is respectively provided with damping ribs matched with the arc-shaped convex ribs on the two sides of the small lock cylinder.

A circular pit is formed in the top of the lock shell around the top circular hole, a driving circular cap of the rotating connecting piece is located in the center of the circular pit, a ring-shaped piece is arranged between the circular pit and the driving circular cap and comprises a fixed half ring and a movable half ring which are mutually independent, the movable half ring is used as the trip piece, and the fixed half ring and the movable half ring are respectively and fixedly connected with the driving circular cap and can rotate along with the driving circular pit; the two ends of the movable semi-ring are respectively provided with a pin shaft, the two sides of the cap of the driving round cap are respectively provided with a pin shaft groove for the pin shaft to insert, and the side of the movable semi-ring of the lock shell, where the movable semi-ring is located, of the circular pit is provided with an outlet groove, so that the movable semi-ring can be pulled up from the side edge of the movable semi-ring, and the movable semi-ring can be twisted to rotate with the small lock cylinder through a rotating connecting piece.

The lock shell is characterized in that 2 limiting convex columns are arranged on the circular pits in the top of the lock shell, circular arc limiting grooves are formed in the bottom surfaces of the fixed semi-rings, and the 2 limiting convex columns are located in the circular arc limiting grooves of the fixed semi-rings, so that the fixed semi-rings, the movable semi-rings, the rotating connecting piece and the small lock cylinder can rotate together within a range of 90 degrees.

The fixed half ring and the movable half ring are provided with a plurality of small convex blocks suitable for being pressed by fingers.

The upper surface of the bottom plate is provided with a plurality of protruding columns, the inner top surface of the lock shell is provided with a plurality of protruding cylinders, cylinder holes for the protruding columns to be inserted are formed in the protruding cylinders, and the protruding columns on the upper surface of the bottom plate are tightly inserted into the cylinder holes on the inner top surface of the lock shell; limiting ribs are symmetrically arranged on the inner top surface of the lock shell; the protruding cylinder is arranged along the side of the sliding fastener.

The connecting belt is provided with a plurality of holes; the connecting belt comprises a lock head connecting end and a free fixed length end, the lock head connecting end of the connecting belt is provided with a connecting hole, the bottom plate is provided with a connecting column, and the connecting column is inserted into the connecting hole in a tight fit mode.

The fixed seat comprises a base shell and a cover block, wherein the base shell is provided with a cover block accommodating pit for accommodating the cover block, and the base shell is also in a shape of a top shell; a downward extending buckling column is arranged below the cover block, a barb is arranged at the lower end of the extending buckling column, and a second pin shaft is arranged at one end of the cover block, which faces the lock head component, and extends out of two sides of the cover block; the bottom wall of the cover block accommodating pit of the base shell is provided with a buckling hole for buckling the extending buckling column, and two sides of the cover block accommodating pit of the base shell, which face one end of the lock body, are provided with corresponding second pin shaft grooves for inserting and rotating second pin shafts; the free fixed length end of the connecting band is positioned in a cover block accommodating pit of the fixed seat base shell and covered by the cover block, and the buckling column extending out of the lower surface of the cover block penetrates through a hole in the corresponding position of the connecting band to fix the connecting band.

A protruding block with a hole at the corresponding position for buckling the connecting belt is arranged on the bottom wall of the cover block accommodating pit of the base shell; the cover block comprises an outer ring body and an inner ring body which are tightly matched into a whole, a second pin shaft is arranged at one end of the outer ring body, which faces the lock head part, and extends out of two sides of the outer ring body, the extending buckling columns are arranged below the inner ring body, and a pressure plate used for pressing the connecting belt is additionally arranged below the outer ring body.

The bottom of the fixed seat is provided with a bottom cover plate, a base plate is arranged below the bottom cover plate, the bottom cover plate is provided with a central hole, and the central hole is a slope hole with a large bottom surface and a small top surface along the thickness of the bottom cover plate; the bed plate is provided with the protruding circle in center, and the protruding at least part that circles in center sets up protruding slope, the bottom cover board is gone into the protruding circle in center of bed plate through its centre bore force for bottom cover board and bed plate are laminated each other and can rotate relatively.

Compared with the prior art that the lock can be unlocked only by one action or two actions of pressing the button, the utility model prevents the lock unlocked by children from being unlocked only by three continuous actions, is very convenient for people who know the unlocking method of the lock, and can conveniently finish the unlocking operation of pulling the trip piece, screwing the small lock cylinder and pressing the sliding fasteners at two sides by one hand; however, for the children who do not know the unlocking method of the lock and have insufficient intelligence, the lock can be almost not unlocked no matter how the children press the lock in disorder, the probability that the children press the lock in disorder to unlock the lock is almost zero, and the unlocking of the children can be effectively avoided. The lock for preventing children from opening is reasonable in overall structural design, except that the compression spring is suitable for being made of metal, other parts are all suitable for being made of plastic injection parts, and the lock is convenient to produce in a large scale, low in cost and attractive and elegant in appearance. In addition, the lock bottom cover plate 35 and the base plate 49 which are prevented from being opened by children are mutually jointed and can rotate relatively; thus, when the lock is mounted on a vertical surface, it can be conveniently rotated to a position facing down the wall in the unlocked state without obstructing vision.

Drawings

FIG. 1 is a perspective view of the lock of the present invention;

FIG. 2 is a schematic bottom perspective view of the lock of the present invention;

FIG. 3 is a perspective view of the lock of the present invention in an unlocked state;

FIG. 4 is a perspective view of the lock housing assembly and the base plate assembly in the lock body in a separated state;

FIG. 5 is a perspective view of the lock housing;

FIG. 6 is a perspective view of the base plate;

FIG. 7 is a front perspective view of the slide fastener;

FIG. 8 is a perspective view of the bottom of the slide fastener;

FIG. 9 is a schematic perspective view of a cylinder drive assembly;

FIG. 10 is a perspective view of the rotating link;

FIG. 11 is a perspective view of a small lock cylinder;

FIG. 12 is a front perspective view of the stationary half ring;

FIG. 13 is a perspective view of the bottom surface of the stationary half ring;

FIG. 14 is a perspective view of the movable half ring;

FIG. 15 is a perspective view of the sliding fastener and the lock case;

FIG. 16 is a perspective view of the fastening tape;

FIG. 17 is a bottom perspective view of the base plate concealed in the mounting seat;

FIG. 18 is a bottom perspective view of the base plate and the bottom cover plate hidden in the fixing base;

FIG. 19 is a perspective view of the base housing;

FIG. 20 is a perspective view of the cover block;

FIG. 21 is a perspective view of the underside of the cover;

fig. 22 is a perspective view of the outer ring body;

FIG. 23 is a perspective view of the bottom surface of the outer ring body;

FIG. 24 is a perspective view of the inner cylinder;

FIG. 25 is a perspective view of the bottom of the inner cylinder;

FIG. 26 is a perspective view of the assembled bottom cover plate and base plate;

FIG. 27 is a perspective view of the bottom cover plate;

figure 28 is a perspective view of the base plate.

Reference numbers in the figures: 1. a lock seat; 2. a lock body; 3. a lock case; 4. a base plate; 5. a small lock cylinder; 6. a side notch; 7. a slide fastener; 8. buckling; 10. a top circular hole; 11. rotating the connecting piece; 12. driving the round cap; 13. a connecting rod; 14. a bottom plate notch; 15. a retaining ring; 16. a rectangular frame; 17. a small notch; 18. a fastener notch; 19. a slider; 20. a protruding block; 21. an arc convex rib; 22. damping ribs; 23. a circular pit; 24. a stationary half ring; 25. a movable half ring; 26. a first pin shaft; 27. a first pin shaft slot; 28. an outlet tank; 29. a limiting convex column; 30. an arc limiting groove; 31. a small bump; 32. a raised post; 33. a convex cylinder; 34. a cylinder bore; 35. a hinge mechanism; 36. limiting ribs; 37. a connecting belt; 38. the holes are arranged; 39. a lock head connecting end; 40. a free fixed length end; 41. a base housing; 42. a cover block; 43. a cover block receiving well; 44. extending the buckling column; 45. a second pin shaft; 46. buckling holes; 47. a second pin shaft slot; 48. a barb; 49. a base plate; 50. connecting holes; 51. connecting columns; 52. a bottom wall; 53. a raised block; 54. a platen; 55. an outer ring body; 56. an inner round body; 57. a central bore; 58. a central convex ring; 59. a convex slope; 60. a fixed seat.

Detailed Description

The following describes a specific embodiment of the present invention, as shown in fig. 1 to 28. The lock for preventing children from opening is suitable for being made of plastic injection molding parts except for the compression spring which is suitable for being made of metal.

A lock for preventing an infant from opening comprises a lock head part 9, a fixed seat 60 and a flexible connecting belt 37 fixedly connected between the lock head part 9 and the fixed seat 60, as shown in fig. 1 and 2. The lock head component comprises a lock seat 1 and a lock body 2 which can be locked or separated with each other. The interlocked state is shown in fig. 1 and 2, and the unlocked state is shown in fig. 3.

As shown in fig. 4, the lock body 2 includes a lock housing 3 and a bottom plate 4, the lock housing 3 is a top shell, and the bottom plate 4 is clamped at the bottom end of the lock housing 3 to form a lock cavity. The two sides of the lock shell 3 are respectively provided with a side gap 6, sliding fasteners 7 are respectively arranged at the opposite positions of the side gaps 6 in the inner cavity of the lock, and the sliding fasteners 7 can move along the directions of the two side gaps 6. The sliding fasteners 7 are provided with a buckle 8, and a compression spring is arranged between the sliding fasteners 7 at two sides to enable the sliding fasteners 7 to protrude outwards. A small rotatable lock cylinder 5 is further arranged in the lock inner cavity, and the small lock cylinder 5 is located between the sliding fasteners 7 on the two sides. A top round hole 10 is formed in the top of the lock shell 3, a rotary connecting piece 11 is arranged on the top of the lock shell, the rotary connecting piece 11 comprises a driving round cap 12 and a connecting rod 13, the driving round cap 12 is located on the upper surface of the lock shell 3, and the connecting rod 13 is inserted into the top round hole 10 and fixedly connected with the small lock cylinder 5; the driving round cap 12 is fixedly connected with a wrenching piece which can be wrenched from the side and can twist the rotary connecting piece 11 and the small lock cylinder 5 to rotate; the bottom plate 4 is provided with a bottom plate notch 14 in the sliding area of the buckle 8 of the sliding buckle 7, and a retaining ring 15 which is suitable for penetrating through the bottom plate notch 14 and is buckled with the buckle 8 of the sliding buckle 7 is arranged on the lock seat 1; when the small lock core 5 rotates to the clamping position, the sliding fasteners 7 on the two sides are propped against and move inwards; when the small lock core 5 rotates to the non-blocking position, the sliding fasteners 7 at two sides can be pressed simultaneously to overcome the elastic force of the compression spring to move inwards to unlock.

As shown in fig. 6, 2 rectangular frames 16 are symmetrically arranged on the bottom plate 4, small gaps 17 are opened at two ends of each rectangular frame 16, and a compression spring is placed in each rectangular frame 16. As shown in fig. 7 and 8, the sliding fastener 7 is provided with a fastener notch 18, a sliding block 19 suitable for sliding between 2 rectangular frames 16 symmetrically arranged on the bottom plate 4 is formed on the inner side of the notch, and the sliding block 19 is provided with a buckle 8 on the inner side of the fastener notch 18; the entity of the inner side of the fastener notch 18 is respectively provided with an extending block 20 which is suitable for being embedded into the small notches 17 at the two ends of the rectangular frame 16 at the two sides of the sliding block 19; the inner side of the sliding block 19 is a concave arc surface, and the concave arc surface of the inner side of the sliding block 19 is respectively provided with damping ribs 22 matched with arc-shaped convex ribs 21 on two sides of the small lock cylinder 5; after installation, the sliding blocks 19 slide between the 2 rectangular frames 16 symmetrically arranged on the bottom plate 4, and the extending blocks 20 are respectively embedded into the small gaps 17 at the two ends of the rectangular frames 16 and are resisted at the two ends of the compression spring.

As shown in fig. 11, the small lock cylinder 5 is cylindrical, the two sides of the outer surface of the cylinder are symmetrically provided with arc-shaped convex ribs 21, and when the arc-shaped convex ribs 21 are positioned right opposite to the sliding fasteners 7 on the two sides, the sliding fasteners 7 on the two sides are propped against to move inwards; when the arc-shaped convex rib 21 is not positioned right opposite to the sliding fasteners 7 on the two sides, the sliding fasteners 7 on the two sides can be pressed simultaneously to overcome the elastic force of the compression spring to move inwards to unlock.

As shown in fig. 5, a circular recess 23 is formed in the top of the lock case 3 around the top circular hole 10. As shown in fig. 1, the driving circular cap 12 of the rotary connecting member 11 is located at the center of the circular recess 23, a ring-shaped member is arranged between the circular recess 23 and the driving circular cap 12, the ring-shaped member includes a fixed half ring 24 and a movable half ring 25 which are independent of each other, the movable half ring 25 is used as a wrench, and the fixed half ring 24 and the movable half ring 25 are respectively and fixedly connected with the driving circular cap 12 and can rotate along with the circular recess 23 of the driving circular cap 12. As shown in fig. 14, the movable half ring 25 has first pins 26 at two ends thereof. As shown in fig. 9, stationary half 24, movable half 25, together with drive dome 12, form a cylinder drive assembly. As shown in fig. 10, the cap both sides of the driving round cap 12 are respectively provided with a first pin shaft groove 27 for the first pin shaft 26 to be inserted; as shown in fig. 4, the circular recess 23 is provided with an outlet groove 28 on the side of the movable half ring 25 of the lock case 3, so that the movable half ring 25 can be pulled up from the side thereof and can be screwed to rotate the rotary connector 11 and the small lock cylinder 5. As shown in fig. 12 and 14, the stationary half ring 24 and the movable half ring 25 are provided with a plurality of small protrusions 31 suitable for pressing with fingers, so that the surfaces of the stationary half ring 24 and the movable half ring 25 can be screwed to rotate the rotary connector 11 and the small key cylinder 5.

As shown in fig. 5, 2 limiting convex columns 29 are arranged on the circular concave pit 23 at the top of the lock case 3, correspondingly, as shown in fig. 13, an arc limiting groove 30 is formed in the bottom surface of the stationary half ring 24, and the 2 limiting convex columns 29 are located in the arc limiting groove 30 of the stationary half ring 24, so that the stationary half ring 24, the movable half ring 25, the rotary connecting member 11 and the small lock cylinder 5 are limited to rotate within a range of 90 degrees together.

As shown in fig. 15 and 8, when the small key cylinder 5 is in the locked position, the arc ribs 21 are engaged between the 2 pairs of damping ribs 22 of the slide fastener 7. Thus, the user has a distinct feel when operating the turning-up movable half ring 25 or twisting the surfaces of the stationary half ring 24 and the movable half ring 25 to turn the small lock cylinder 13 to the locked position.

As shown in fig. 4, 6 and 15, a plurality of protruding columns 32 are arranged on the bottom plate 4 of the lock body 2, a plurality of protruding cylinders 33 are arranged on the inner top surface of the lock shell 3 of the lock body 2, cylinder holes 34 into which the protruding columns 32 are inserted are formed in each protruding cylinder 33, and the protruding columns 32 on the bottom plate 4 are tightly inserted into the cylinder holes 34 on the inner top surface of the lock shell 3. Similarly, as shown in fig. 18, 26 or 27, a plurality of protruding columns 32 are disposed on the cover plate 35 of the fixing base 60, a plurality of protruding cylinders 33 are disposed on the inner top surface of the base housing 41 of the fixing base 60, cylinder holes 34 for inserting the protruding columns 32 are formed in each protruding cylinder 33, and the protruding columns 32 on the cover plate 35 are tightly inserted into the cylinder holes 34 on the inner top surface of the base housing 41. If the tight fit is not sufficiently secure, further glue bonding or ultrasonic welding may be used. The inner top surface of the lock shell 3 is symmetrically provided with limiting ribs 36 which are used for pressing the sliding fasteners 7 at two sides to overcome the limitation of inward movement of the elastic force of the compression spring. As shown in FIG. 15, the protruded barrel 33 on the inner top surface of the lock case 3 is disposed along the side of the sliding fastener 7, and the problem of side limitation of the sliding fastener 7 is solved.

As shown in fig. 16, the connecting tape 37 is provided with a plurality of tape holes 38; the connecting belt 37 comprises a tapered end connecting end 39 and a free fixed length end 40, and the tapered end connecting end 39 of the connecting belt 37 is provided with a connecting hole 50. As shown in fig. 6, a connection post 51 is provided on the bottom plate 4, and the connection post 51 is inserted into the connection hole 50 with a tight fit.

The fixing base 60 includes a base housing 41 and a cover block 42. As shown in fig. 19, the base case 41 is provided with a cover block accommodating hole 43 for accommodating the cover block 42, and the base case 41 is also shaped like a top case. As shown in fig. 20 and 21, a downwardly extending buckling column 44 is disposed below the cover block 42, a barb 48 is disposed at the lower end of the extending buckling column 44, and a second pin 45 is disposed at one end of the cover block 42 facing the lock head component 9 and extends towards both sides thereof. As shown in fig. 19, a fastening hole 46 for fastening the extended fastening post 44 is formed in a bottom wall 52 of the cover block accommodating hole 43 of the base housing 41, and corresponding second pin shaft grooves 47 for inserting and rotating the second pin shafts 45 are formed in two sides of one end of the cover block accommodating hole 43 of the base housing 41 facing the lock body 2; the free end 40 of the connecting strip 37 is located in a cover block receiving recess 43 of the base housing 41 of the fixing base 60 and is covered by the cover block 42, and a fastening post 44 extending from the underside of the cover block 42 is inserted through a corresponding hole 38 of the connecting strip 37 to fix the connecting strip, as shown in fig. 17 and 18.

As shown in FIG. 19, the bottom wall 52 of the cover block receiving cavity 43 of the base housing 41 is provided with a raised block 53 for engaging the corresponding position of the strap 37 with the strap hole 38. As shown in fig. 22, 23, 24 and 25, the cover block 42 may be separately provided and includes an outer ring body 55 and an inner ring body 56 which are tightly fitted into a whole, the end of the outer ring body facing the locking head part 9 is provided with a second pin 45 extending towards both sides thereof, the lower surface of the inner ring body is provided with a protruding button 44, and the lower surface of the outer ring body is further provided with a pressing plate 54 for pressing the connecting band 37.

As shown in fig. 17, the bottom of the fixing base 60 is provided with a bottom cover plate 35. As shown in fig. 26, 27 and 28, a base plate 49 is arranged below the bottom cover plate 35, the bottom cover plate 35 is provided with a central hole 57, and the central hole 57 is a slope hole with a large bottom surface and a small top surface along the thickness of the bottom cover plate 35; the base plate 49 is provided with a central convex ring 58, at least a part of the central convex ring 58 is provided with a convex slope 59, and the bottom cover plate 35 is forcibly clamped into the central convex ring 58 of the base plate 49 through the central hole 57 thereof, so that the bottom cover plate 35 and the base plate 49 are engaged with each other and can rotate relatively. Thus, when the lock is mounted on a vertical surface, it can be conveniently rotated to a position facing down the wall in the unlocked state without obstructing vision.

For convenience of use and installation, the bottom surfaces of the lock seat 1 of the lock head part 9 and the base plate 49 of the fixed seat 60 can be respectively pasted with double-sided adhesive tapes, and high-quality and durable double-sided adhesive tapes produced by 3M company can be selected. When the lock is mounted, the lock base 1 and the base plate 49 are respectively attached to a target device such as a cabinet door having an open/close positional relationship by tearing the protective film on the double-sided tape.

The lockset for preventing the child from opening is particularly suitable for being arranged between the cabinet door, the refrigerator door and the side wall of the cabinet door. In the normal state, the small lock cylinder 5 is in the locking position, the stationary half ring 24 and the movable half ring 25 are both in the flat state, and the movable half ring 25 faces the direction of the outlet groove 28. Before locking, the movable half ring 25 can be pulled up from the side of the outlet slot 28, and the rotary connecting piece 11 is screwed to rotate 90 degrees with the small lock cylinder 5, so that the small lock cylinder 5 is in an opening position. During locking, as shown in fig. 3, the bottom plate notch 14 of the lock body 2 is pressed by force to align with the retaining ring 15 of the lock base 1. Because the back of the barb of the buckle 8 is a slope and the back of the retaining ring 15 is also a slope, the lock body 2 overcomes the elasticity of the compression spring and slides down along the slope until the barb of the buckle 8 is buckled into the retaining ring 15 to complete locking, and the locking state is kept under the elasticity of the compression spring. After locking, the rotating connecting piece 11 is screwed to rotate by 90 degrees in the opposite direction with the small lock cylinder 5 to reset, and the movable semi-ring 25 also resets.

Before unlocking, the movable half ring 25 is also pulled up from the side of the outlet slot 28, and the rotary connecting piece 11 is screwed to rotate 90 degrees with the small lock cylinder 5, so that the small lock cylinder 5 is in an opening position. When unlocking, a user only needs to press the sliding fasteners 7 on the two sides against the elasticity of the compression spring, namely, the sliding fasteners 7 exposed on the two sides are pressed inwards until the buckle 8 is separated from the retaining ring 15 on the lock base 1, so as to unlock the lock. Thus, the unlocking process comprises three actions of pulling, rotating and pressing.

The lock unlocking method for preventing the lock unlocked by the child from being unlocked only by three continuous actions is very convenient for people who know the unlocking method of the lock, the unlocking operation can be conveniently completed by one hand, and the locking and unlocking operations are very convenient; however, for the children who do not know the unlocking method of the lock and have insufficient intelligence, the lock can be hardly unlocked no matter how the children press the lock in disorder, and the probability that the children press the lock in disorder to unlock the lock is almost zero.

Claims (10)

1. A lock for preventing children from unlocking comprises a lock head component (9), a fixed seat (60) and a flexible connecting belt (37) fixedly connected between the lock head component (9) and the fixed seat (60), and is characterized in that the lock head component (9) comprises a lock seat (1) and a lock body (2) which can be locked or separated with each other, the lock body (2) comprises a lock shell (3) and a bottom plate (4), the lock shell (3) is a top shell, and the bottom plate (4) is clamped at the bottom end of the lock shell (3) to form a lock inner cavity; side notches (6) are respectively formed in two sides of the lock shell (3), sliding fasteners (7) capable of moving along the direction of the notches (6) in the two sides are respectively installed in the opposite positions of the side notches (6) in the inner cavity of the lock, buckles (8) are arranged on the sliding fasteners (7), and compression springs are arranged between the sliding fasteners (7) in the two sides to enable the sliding fasteners (7) to protrude outwards; a small rotatable lock cylinder (5) is further arranged in the lock inner cavity, and the small lock cylinder (5) is located between the sliding fasteners (7) on the two sides; a top round hole (10) is formed in the top of the lock shell (3) and a rotary connecting piece (11) is arranged on the top of the lock shell, the rotary connecting piece (11) comprises a driving round cap (12) and a connecting rod (13), the driving round cap (12) is located on the lock shell (3), and the connecting rod (13) is inserted into the top round hole (10) and fixedly connected with the small lock cylinder (5); the driving round cap (12) is fixedly connected with a wrenching piece which can be wrenched from the side of the driving round cap and can twist the rotating connecting piece (11) and the small lock cylinder (5) to rotate; a bottom plate notch (14) is formed in the sliding area of the buckle (8) of the sliding fastener (7) of the bottom plate (4), and a snap ring (15) which is suitable for penetrating through the bottom plate notch (14) and is buckled with the buckle (8) of the sliding fastener (7) is arranged on the lock base (1); when the small lock cylinder (5) rotates to the clamping position, the sliding fasteners (7) on the two sides are propped against and move inwards; when the small lock core (5) rotates to a non-blocking position, the sliding fasteners (7) at two sides can be pressed simultaneously to overcome the elastic force of the compression spring to move inwards to unlock.

2. The infant-opening prevention lock according to claim 1, wherein 2 rectangular frames (16) are symmetrically arranged on the bottom plate (4), small notches (17) are formed at two ends of each rectangular frame (16), and the compression spring is placed in each rectangular frame (16); the sliding fastener (7) is provided with a fastener notch (18), sliding blocks (19) which are suitable for sliding among 2 rectangular frames (16) symmetrically arranged on the bottom plate (4) are formed on the inner side of the notch, and the buckles (8) are arranged on the sliding blocks (19) on the inner side of the fastener notch (18); the entity at the inner side of the fastener notch (18) is respectively provided with an extending block (20) which is suitable for being embedded into the small notches (17) at the two ends of the rectangular frame (16) at the two sides of the sliding block (19); after the installation, the sliding block (19) slides between 2 rectangular frames (16) symmetrically arranged on the bottom plate (4), and the extending blocks (20) are respectively embedded into small gaps (17) at two ends of each rectangular frame (16) and abut against two ends of a compression spring.

3. The infant-proof lock according to claim 2, characterized in that the small lock cylinder (5) is cylindrical, and arc-shaped ribs (21) are symmetrically arranged on two sides of the cylinder, and when the arc-shaped ribs (21) are located opposite to the sliding fasteners (7) on two sides, the sliding fasteners (7) on two sides are propped against the arc-shaped ribs to move inwards; when the arc convex rib (21) is not aligned with the sliding fasteners (7) at the two sides, the sliding fasteners (7) at the two sides can be pressed simultaneously to overcome the elastic force of the compression spring to move inwards to unlock.

4. The infant-resistant lock according to claim 1, wherein a circular recess (23) is formed in the top of the lock housing (3) around the top circular hole (10), the driving circular cap (12) of the rotary connecting member (11) is located at the center of the circular recess (23), a ring member is disposed between the circular recess (23) and the driving circular cap (12), the ring member comprises a stationary half ring (24) and a movable half ring (25) which are independent of each other, the movable half ring (25) serves as the trip member, and the stationary half ring (24) and the movable half ring (25) are respectively fixedly connected with the driving circular cap (12) and can rotate with the circular recess (23) of the driving circular cap (12); the two ends of the movable half ring (25) are respectively provided with a first pin shaft (26), the two sides of the cap of the driving round cap (12) are respectively provided with a first pin shaft groove (27) for the first pin shaft (26) to insert, and the side of the circular pit (23) where the movable half ring (25) is arranged is provided with an outlet groove (28), so that the movable half ring (25) can be pulled up from the side of the movable half ring and can be twisted to rotate the rotating connecting piece (11) and the small lock cylinder (5).

5. The infant-resistant lock according to claim 4, wherein 2 limiting convex columns (29) are arranged on the circular concave pit (23) on the top of the lock case (3), the bottom surface of the fixed half ring (24) is provided with a circular arc limiting groove (30), and the 2 limiting convex columns (29) are located in the circular arc limiting groove (30) of the fixed half ring (24), so that the fixed half ring (24), the movable half ring (25), the rotating connecting member (11) and the small lock cylinder (5) rotate together within a range of 90 degrees.

6. The infant-resistant lock according to claim 1, wherein the base plate (4) is provided with a plurality of protruding columns (32), the inner top surface of the lock case (3) is provided with a plurality of protruding cylinders (33), each protruding cylinder (33) is provided with a cylinder hole (34) for the protruding column (32) to insert, and the protruding columns (32) on the base plate (4) are inserted into the cylinder holes (34) on the inner top surface of the lock case (3) in a tight fit manner; limiting ribs (36) are symmetrically arranged on the inner top surface of the lock shell (3); the protruding cylinder (33) is arranged along the side of the sliding fastener (7).

7. Infant opening prevention lock according to claim 1, characterized in that the connecting strap (37) is provided with a plurality of strap holes (38); connecting hole (50) are seted up to connecting band (37) including tapered end link (39) and free length fixing end (40), tapered end link (39) of connecting band (37), set up spliced pole (51) above bottom plate (4), spliced pole (51) are inserted with the tight fit in connecting hole (50).

8. The child resistant lockset as recited in claim 1, wherein said mounting base (60) comprises a base housing (41) and a cover block (42), wherein said base housing (41) defines a cover block receiving cavity (43) for receiving said cover block (42), said base housing (41) also having a top housing shape; a downward extending buckling column (44) is arranged below the cover block (42), a barb (48) is arranged at the lower end of the extending buckling column (44), and a second pin shaft (45) is arranged at one end of the cover block (42) facing the lock head component (9) and extends towards two sides of the cover block; a buckling hole (46) for buckling the extending buckling column (44) is formed in the bottom wall (52) of the cover block accommodating pit (43) of the base shell (41), and corresponding second pin shaft grooves (47) for inserting and rotating second pin shafts (45) are formed in two sides of one end, facing the lock body (2), of the cover block accommodating pit (43) of the base shell (41); the free fixed length end (40) of the connecting band (37) is positioned in a cover block accommodating pit (43) of the base shell (41) and is covered by a cover block (42), and a buckling column (44) extending out of the lower surface of the cover block (42) penetrates through a hole (38) at a corresponding position of the connecting band (37) to fix the connecting band.

9. The child resistant lock according to claim 8, wherein the bottom wall (52) of the cover receiving cavity (43) of the base housing (41) has a raised block (53) for engaging the corresponding hole (38) of the attachment strap (37); the cover block (42) comprises an outer ring body (55) and an inner ring body (56) which are tightly matched into a whole, one end of the outer ring body, facing the lock head component (9), is provided with a second pin shaft (45) and extends out towards two sides of the outer ring body, the lower surface of the inner ring body is provided with the extending buckling column (44), and the lower surface of the outer ring body is additionally provided with a pressing plate (54) used for pressing the connecting belt (37).

10. The infant-opening prevention lock according to claim 1, wherein a bottom cover plate (35) is disposed at the bottom of the fixed seat (60), a base plate (49) is disposed below the bottom cover plate (35), a central hole (57) is formed in the bottom cover plate (35), and the central hole (57) is a slope hole with a large bottom surface and a small top surface along the thickness of the bottom cover plate (35); the base plate (49) is provided with a central convex ring (58), at least part of the central convex ring (58) is provided with a convex slope (59), and the bottom cover plate (35) is forcibly clamped into the central convex ring (58) of the base plate (49) through a central hole (57) of the bottom cover plate, so that the bottom cover plate (35) and the base plate (49) are mutually attached and can rotate relatively.

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