CN206275626U - Pot lid component and kettle - Google Patents

Abstract

The utility model provides a kind of pot lid component and kettle.Pot lid body is included according to kettle of the present utility model；Lock；Anchor switch, is connected on pot lid body and with lock；Lock return unit, is movably disposed in pot lid body, is set with lock linkage, and lock return unit has retracted position corresponding with the latched position of lock, and extended position corresponding with the unlocked position of lock.In the pot lid component and kettle of the utility model offer, by setting lock return unit in pot lid component, during closing lid, the trigger architecture that lock return unit on pot lid component can be set with correspondence position in kettle body coordinates, lock return unit is driven to be switched from extended position to retracted position from trigger architecture, and then the lock being connected with lock return unit is switched from unlocked position to latched position, anchor switch need not be operated to be capable of achieving the automatic locking of pot lid when realizing closing lid, the operation of operation anchor switch when simplifying closing lid.

Description

Pot lid component and kettle

Technical field

The utility model is related to kettle technical field, and in particular to a kind of pot lid component and kettle.

Background technology

At present, in kettle technical field, a kind of popular preventing spillage during pouring, its feature is kettle after kettle is toppled over Lid will not be automatically opened up, and the water in kettle will not overflow.And to realize that the above topples over Anti-spill, generally by the kettle in kettle Design lock is covered, while setting the button bit with snap fit in the kettle body of kettle.In closing lid, by operating on pot lid Anchor switch, protrudes lock and is interlocked with the button bit in kettle body, so as to pot lid is sealed, prevent kettle from toppling over rear pot lid and opens The water in kettle is caused to overflow, and then Anti-spill is toppled in realization.

But, in the prior art, lock protrusion is fastened with button bit realizes that pot lid is sealed, and lock is inside contracted and departed from button bit Fastening realizes that pot lid unblock is required to by operating anchor switch, drives lock protrusion by anchor switch transmission and inside contracts realization. So user operate when in use can be relatively complicated, pot lid is carried out sealed in closing lid and is both needed to when uncapping and pot lid being unlocked Anchor switch is operated, Consumer's Experience is not good.

Utility model content

The utility model aims to provide a kind of pot lid component and kettle, to simplify folding lid operation, lifts Consumer's Experience.

To achieve the above object, the utility model provides a kind of pot lid component, including：Pot lid body；Lock, may move Be arranged in pot lid body, lock have stretch out pot lid body for in kettle body button bit coordinate so that pot lid body is sealed Latched position, and unlocked position of the retraction pot lid body so that pot lid body to be unlocked；Anchor switch, on pot lid body simultaneously It is connected with lock, for driving lock to be moved to unlocked position from latched position；Also include：Lock return unit, may move Be arranged in pot lid body, with the corresponding retracted position of latched position with lock, and the unlocked position pair with lock The extended position answered, and lock return unit with lock each other linkage set, by be arranged in kettle body it is corresponding latch return unit The trigger architecture that position is set coordinates, and realizes that lock return unit is switched from extended position to retracted position.

Further, also including the reset link gear for realizing lock return unit with latch the setting that links each other.

Further, reset link gear includes：Reset STATEMENT OF FEDERALLY SPONSORED, reset link gear includes reset STATEMENT OF FEDERALLY SPONSORED, can turn Be arranged on dynamicly on pot lid body, with lock return unit by commutating structure coordinate, and can in the presence of biasing force with shifting The self-locking structure formed for carrying out self-locking to the unlocked position for latching is moved to the lock of unlocked position；The rotation of reset STATEMENT OF FEDERALLY SPONSORED Motion can mutually be changed by commutating structure with the linear motion of lock return unit；The linear motion of return unit is latched by changing Driving self-locking structure unblock in the rotary movement of reset STATEMENT OF FEDERALLY SPONSORED is converted to structure.

Further, commutating structure includes：The commutation being arranged in lock return unit and reset STATEMENT OF FEDERALLY SPONSORED alternative one is oblique Face, and the two another upper inclined-plane fit structure corresponding with commutation inclined-plane.

Further, inclined-plane fit structure is commutation cambered surface.

Further, self-locking structure includes the self-locking grooves being arranged on lock and the self-locking being arranged on reset link gear It is raised.

Further, reset link gear also includes：First reset bias piece, applies towards lock side to reset STATEMENT OF FEDERALLY SPONSORED To biasing force, with the trend for making reset STATEMENT OF FEDERALLY SPONSORED that self-locking is formed with the lock for being moved to unlocked position.

Further, the first reset bias piece is connected for one end with pot lid body, the rotation of the other end and reset STATEMENT OF FEDERALLY SPONSORED First spring of free end connection.

Further, reset link gear also includes：

Second reset bias piece, applies the biasing force towards latched position direction, for latching in solution lock-bit to lock Lock is driven to switch from unlocked position to latched position after putting disengaging self-locking.

Further, the second reset bias piece is that one end is connected with the pot lid body of the unlocked position side of lock, another Hold the second spring being connected with lock.

Further, anchor switch is rotary switch, and pot lid component also includes that connection rotary switch and the switch of lock are passed Motivation structure, the drive connection for realizing rotary switch and lock.

Further, switch drive includes switch driving member, and switching one end of driving member is used to be cut with scissors with rotary switch Connect, switching the other end of driving member is used to be hinged with lock.

The utility model also provides a kind of kettle, including：Pot lid component；Kettle body, coordinates pot lid component to use；Pot lid component It is pot lid component as described above；The trigger architecture corresponding with lock return unit is provided with kettle body, trigger architecture is in pot lid Lock return unit is triggered during component lid to kettle body so that lock return unit is switched from extended position to retracted position.

Further, kettle body correspondence lock is provided with the button bit with snap fit.

Further, trigger architecture is the convex tendon for being arranged on button bit protrusions, and correspondence convex tendon is along pot lid component closing lid direction It is provided with the escape groove for avoiding lock return unit.

Further, guiding convex tendon is provided with the mating surface of convex tendon and/or lock return unit to coordinate with lock return unit Guide structure.

Technical solutions of the utility model, have the following advantages that：

In the pot lid component and kettle of the utility model offer, by setting lock return unit, lock in pot lid component Return unit has retracted position corresponding with the latched position of lock, and extended position corresponding with the unlocked position of lock, So as to during closing lid, the trigger architecture that the lock return unit on pot lid component can be set with correspondence position in kettle body is matched somebody with somebody Close, drive lock return unit to be switched from extended position to retracted position from trigger architecture, and then be connected with lock return unit Lock from unlocked position to latched position switch, need not be operated when realizing closing lid anchor switch i.e. be capable of achieving pot lid automatic lock Close, the operation of operation anchor switch, improves Consumer's Experience when simplifying closing lid.

Brief description of the drawings

In order to illustrate more clearly of the utility model specific embodiment or technical scheme of the prior art, below will be right The accompanying drawing to be used needed for specific embodiment or description of the prior art is briefly described, it should be apparent that, describe below In accompanying drawing be some implementation methods of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.In the accompanying drawings：

Fig. 1 is the structural representation of the kettle of the utility model embodiment；

Fig. 2 is the structural representation of pot lid component in Fig. 1, wherein, the lock in pot lid component is in and stretches out pot lid component Latched position；

Fig. 3 is the mplifying structure schematic diagram in A portions in Fig. 2；

Fig. 4 is that the assembling structure of lock return unit, lock and reset link gear in the utility model embodiment is illustrated Figure, wherein lock is in latched position；

Fig. 5 is the configuration schematic diagram of assembling structure shown in Fig. 4；

Fig. 6 is that the assembling structure of lock return unit, lock and reset link gear in the utility model embodiment is illustrated Figure, wherein lock is in the unlocked position；

Fig. 7 is the assembling structure schematic diagram of anchor switch, lock and switch drive in the utility model embodiment；

Fig. 8 is the structural representation of kettle body in the utility model embodiment；

Fig. 9 is the mplifying structure schematic diagram in B portions in kettle body shown in Fig. 8；

Wherein, the reference in above-mentioned accompanying drawing is：

10- pot lid bodies；20- is latched；21- self-locking grooves；30- rotary switches；40- latches return unit；41- commutations inclined-plane； 51- reset STATEMENT OF FEDERALLY SPONSOREDs；511- self-lockings are raised；512- inclined-planes fit structure；52- the first reset bias pieces；53- second resets and biases Part；61- switchs driving member；80- kettle bodies；81- button bits；82- trigger architectures；83- escape groove.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, this The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality Novel protected scope.

It is term " " center ", " on ", D score, "left", "right", " perpendicular, it is necessary to explanation in description of the present utility model Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outward " are, based on orientation shown in the drawings or position relationship, to be only Described with simplified for the ease of description the utility model, must had rather than the device or element for indicating or implying meaning specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.

As shown in Figures 2 to 6, the pot lid component according to the utility model embodiment includes：Pot lid body 10；Lock 20, It is movably disposed in pot lid body 10, and with stretching out pot lid body 10 for coordinating with by kettle with button bit 81 in kettle body 80 The sealed latched position of lid body 10, and retraction pot lid 10 unlocked position so that pot lid body 10 to be unlocked of body；Lock is opened Close, be connected on pot lid body 10 and with lock 20, for driving lock 20 to be moved to unlocked position from latched position； Also include：Lock return unit 40, is movably disposed in pot lid body 10, with contracting corresponding with the latched position of lock 20 Return is put, and extended position corresponding with the unlocked position of lock 20, and lock return unit 40 links and sets each other with lock 20 Put, coordinate by with the trigger architecture 82 for being arranged on corresponding lock return unit 40 position setting in kettle body 80, realize that lock resets Part 40 is switched from extended position to retracted position.

So as in the pot lid component of the utility model embodiment, by setting lock return unit 40 in pot lid component, Lock return unit 40 has retracted position corresponding with the latched position of lock 20, and corresponding with the unlocked position of lock 20 Extended position, so as to during closing lid, the lock return unit 40 on pot lid component can be set with correspondence position in kettle body 80 Trigger architecture 82 coordinate, from trigger architecture 82 drive lock return unit 40 from extended position to retracted position switch, Jin Eryu The lock 20 of the lock drive connection of return unit 40 is switched from unlocked position to latched position, and lock 20 need not be operated when realizing closing lid Switch is capable of achieving the automatic locking of pot lid, and the operation of the switch of operation lock 20, improves Consumer's Experience when simplifying closing lid.

Realize latching the connection that specially resets that return unit 40 is set with the linkage each other of lock 20 in the utility model embodiment Motivation structure.Below in conjunction with Fig. 4 to Fig. 6, for lock return unit 40 in closing lid from trigger mechanism drive from extended position to Retracted position switches, so drive the concrete structure of reset link gears that lock 20 switch from unlocked position to latched position with The course of work is illustrated.

Reset link gear includes reset STATEMENT OF FEDERALLY SPONSORED 51, the first reset bias piece 52 and the second reset bias piece 53, leads to The mutual cooperation of above-mentioned part and the cooperation of pot lid body 10 and the cooperation with lock 20 and lock return unit 40 are crossed, and then Complete the transmission operation of the reset of lock 20.

Specifically, the reset STATEMENT OF FEDERALLY SPONSORED 51 in reset link gear is rotatably arranged on pot lid body 10, is being resetted Being provided with STATEMENT OF FEDERALLY SPONSORED 51 and lock 20 carries out the self-locking structure of self-locking, reset STATEMENT OF FEDERALLY SPONSORED 51 for the unlocked position to lock 20 In different turned positions, it is possible to achieve switch in self-locking position and between releasing self-locking position.Self-locking structure is specifically included and set Put the self-locking grooves 21 on lock 20 and be arranged on the self-locking projection 511 latched on return unit 40, and then latch 20 and be moved through Cheng Zhong, when switching to unlocked position by latched position, self-locking projection 511 is fallen into self-locking grooves 21, self-locking raised 511 and self-locking grooves 21 are mutually clamped, and then prevent lock 20 from freely switching to latched position from unlocked position, that is, prevent lock 20 in pot lid group Stretched out in part.

Also include being arranged on lock return unit 40 and reset STATEMENT OF FEDERALLY SPONSORED 51 except above-mentioned self-locking structure, in reset link gear Upper commutating structure.Because reset STATEMENT OF FEDERALLY SPONSORED 51 is to rotate to set, lock return unit 40 is linear motion, by commutating structure, can To realize being commutated between the movement and the rotation of reset STATEMENT OF FEDERALLY SPONSORED 51 to lock return unit 40, i.e., reset STATEMENT OF FEDERALLY SPONSORED 51 is rotated When, lock return unit 40 can be driven to move along a straight line, when the linear motion of return unit 40 is latched, reset tumbler can be driven to turn It is dynamic.

Specifically, being arranged on commutating structure in lock return unit 40 and reset STATEMENT OF FEDERALLY SPONSORED 51 includes being arranged on lock return unit Inclined-plane fit structure 512 on 40 commutation inclined-plane 41 and reset STATEMENT OF FEDERALLY SPONSORED 51, is coordinated by above-mentioned commutation inclined-plane 41 and inclined-plane The cooperation of structure 512, so as to realize commutation.In a preferred embodiment mode, inclined-plane fit structure 512 uses commutation cambered surface, So contact area reduces, and commutates better, and certain inclined-plane fit structure 512 can also be that inclined-plane etc. can be with commutation inclined-plane 41 coordinate the structure for realizing commutation.

As shown in Figure 4 and Figure 5, for reset link gear in the spring as the first reset bias piece 52, spring One end is abutted with pot lid body 10, and the other end is abutted with the movable end of the rotatable reset STATEMENT OF FEDERALLY SPONSORED 51 for setting, and with making oneself Lock construction carries out the trend of self-locking to the unlocked position of lock 20, i.e., with making self-locking projection 511 fall into becoming in self-locking grooves 21 Gesture, so as to when lock 20 switches from latched position to unlocked position, when lock 20 is moved to correct position, reset STATEMENT OF FEDERALLY SPONSORED 51 Rotate downwards under the action of the spring, self-locking projection 511 falls into self-locking grooves 21 and realizes self-locking.

For reset link gear as the second reset bias piece 53 spring, one end and the pot lid body 10 of spring are supported Connect, the other end 20 is abutted with lock, and with the trend for making lock 20 be moved to latched position, i.e., with making lock 20 to overhanging The trend for going out, so that latch 20 after unlocked position departs from self-locking, can be in the presence of spring force from unlocked position to sealed Automatically switch position.

Certainly, for above-mentioned first reset bias piece 52 and the second reset bias piece 53, except spring can be used, may be used also Being the structure or part with elastic property such as elastic support, elastic caoutchouc.

Illustrate that lock 20 and lock return unit 40 realize transmission by reset link gear below in conjunction with Fig. 4 to Fig. 6 Working process and principle.

As shown in Figure 4 and Figure 5, retracted so as to realize from the button bit 81 in kettle body 80, it is necessary to latch 20 first when uncapping Unblock.Operation lock 20 is switched, and lock 20 is retracted in the presence of the switch of lock 20 from latched position to unlocked position, in movement During self-locking 511 correspondence position of projection in the self-locking grooves 21 and reset STATEMENT OF FEDERALLY SPONSORED 51 on to lock 20, reset STATEMENT OF FEDERALLY SPONSORED 51 is the Rotated down in the presence of one reset bias piece 52, and then realize self-locking raised 511 and the cooperation of self-locking grooves 21.Linked resetting During part 51 is rotated down, lock return unit 40 is driven in the presence of commutating structure by the rotation of reset STATEMENT OF FEDERALLY SPONSORED 51 Lock return unit 40 moves outwardly to latch the extended position of return unit 40.

As shown in Figure 5 and Figure 6, stretched out from pot lid component and the button bit 81 in kettle body 80, it is necessary to latch 20 in closing lid Cooperation realize it is sealed, prevent pot lid component be opened and current out.In closing lid, in the meeting of lock return unit 40 and kettle body 80 Trigger architecture 82 is abutted, and during closing lid, lock return unit 40 is in the presence of trigger architecture 82 from extended position to retraction Position switches, and then in the presence of commutating structure, from lock return unit 40 move inward drive reset STATEMENT OF FEDERALLY SPONSORED 51 to Upper rotation, so by reset STATEMENT OF FEDERALLY SPONSORED 51 be rotated up realize that self-locking projection 511 takes off from from lock crossbeam 21 in self-locking structure Depart from self-locking from realization, and then latch 20 and switched from unlocked position to latched position in the presence of the second reset bias piece 53, And then the sealed of pot lid is realized, said process is capable of achieving without the switch of operation lock 20.

In another embodiment not shown of the utility model, reset link gear includes the flexibility being arranged in bending channel Rod, the two ends of flexible bar coordinate with lock and lock return unit respectively, when lock return unit is inwardly retracted, drive flexible bar The other end is protruding, drive the other end lock it is protruding realize it is sealed.

Illustrate to latch 20 switches and lock 20 by switching transmission in the utility model embodiment below in conjunction with Fig. 7 Mechanism realizes the structure and principle of transmission.

The switch of lock 20 in the utility model embodiment is rotary switch 30, relative in the prior art using button Mode, Consumer's Experience can be further improved in the utility model embodiment, and the operating process of the switch of lock 20 is more It is natural, while transmission structure of switch can be simplified.

As shown in fig. 7, switch drive includes switch driving member 61, switching one end of driving member 61 is used to be opened with knob Close 30 to be hinged, switching the other end of driving member 61 is used to be hinged with lock 20, so that in turning knob switch 30, rotary switch 30 can drive switch driving member 61 to move, and then drive lock 20 to move, and realize that lock 20 inside contracts unblock when uncapping.

The utility model also provides a kind of kettle, including pot lid component, and kettle body 80, correspondence pot lid component is set, pot lid group Part is pot lid component as described above, so that kettle of the present utility model is capable of achieving in closing lid without the switch of operation lock 20 The automatic locking of pot lid, the operation of the switch of operation lock 20, improves Consumer's Experience when simplifying closing lid.

As shown in Figure 8 and Figure 9,20 button bits 81 of the correspondence of kettle body 80 lock install the button bit 81 for being equipped with and coordinating with lock 20, with And correspondence lock return unit 40 position set for the trigger architecture 82 that coordinates with lock return unit 40, in closing lid with Lock return unit 40 coordinates.Trigger architecture 82 is specially the convex tendon for being arranged on the protrusions of button bit 81, and correspondence convex tendon is along pot lid component Closing lid direction is provided with the escape groove 83 for avoiding lock return unit 40, it is to avoid the lock return unit 40 and kettle body stretched out in closing lid 80 interfere.

Preferably, in the mating surface of convex tendon and lock return unit 40, or individually convex tendon and lock return unit 40 The guiding cambered surface as guide structure that guiding convex tendon coordinates with lock return unit 40 is provided with mating surface, in closing lid, can To guide trigger architecture 82 and lock return unit 40 to coordinate, it is to avoid situations such as interim card occur, Consumer's Experience is further improved.

Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of implementation method.It is right For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or Change.There is no need and unable to be exhaustive to all of implementation method.And the obvious change thus extended out or Among the protection domain that variation is created still in the utility model.

Claims (16)

1. a kind of pot lid component, including：

Pot lid body (10)；

Lock (20), is movably disposed in the pot lid body (10), and the lock (20) is with stretching out the pot lid sheet Body (10) with button bit (81) in kettle body (80) for coordinating with by the sealed latched position of the pot lid body (10), and retracts Unlocked position of the pot lid body (10) so that the pot lid body (10) to be unlocked；

Anchor switch, is connected, on the pot lid body (10) and with the lock (20) for driving the lock (20) it is moved to the unlocked position from the latched position；

Characterized in that, also including：

Lock return unit (40), is movably disposed in the pot lid body (10), with sealed with the lock (20) The corresponding retracted position in position, and extended position corresponding with the unlocked position of the lock (20), and the lock reset Part (40) links setting each other with the lock (20), by be arranged on the corresponding lock return unit in the kettle body (80) (40) trigger architecture (82) that position is set coordinates, and realizes that lock return unit (40) is cut from extended position to retracted position Change.

2. pot lid component according to claim 1, it is characterised in that

Also include for realizing that lock return unit (40) and the lock (20) link the reset link gear of setting each other.

3. pot lid component according to claim 2, it is characterised in that the reset link gear includes：

The reset link gear includes reset STATEMENT OF FEDERALLY SPONSORED (51), is rotatably arranged on the pot lid body (10), with institute State lock return unit (40) to coordinate by commutating structure, and in the presence of biasing force and the unlocked position can be moved to The lock (20) forms the self-locking structure that self-locking is carried out for the unlocked position to the lock (20)；The reset STATEMENT OF FEDERALLY SPONSORED (51) rotary motion can mutually be changed by the commutating structure with the linear motion of lock return unit (40)；It is described The linear motion of lock return unit (40) is converted to the rotary motion of the reset STATEMENT OF FEDERALLY SPONSORED (51) by the commutating structure The self-locking structure is driven to unlock in journey.

4. pot lid component according to claim 3, it is characterised in that the commutating structure includes：

The commutation inclined-plane (41) in described lock return unit (40) and the reset STATEMENT OF FEDERALLY SPONSORED (51) alternative one is arranged on, and Inclined-plane fit structure (512) corresponding with the commutation inclined-plane (41) on the two is another.

5. pot lid component according to claim 4, it is characterised in that the inclined-plane fit structure (512) is commutation cambered surface.

6. pot lid component according to claim 3, it is characterised in that the self-locking structure includes：It is arranged on the lock (20) self-locking grooves (21) on and self-locking projection (511) being arranged on the reset link gear.

7. the pot lid component according to claim 3-6 any one, it is characterised in that the reset link gear is also wrapped Include：

Apply the first reset bias piece (52) towards the lock (20) direction biasing force to the reset STATEMENT OF FEDERALLY SPONSORED (51), with Make the reset STATEMENT OF FEDERALLY SPONSORED (51) that the trend of self-locking is formed with the lock (20) for being moved to the unlocked position.

8. pot lid component according to claim 7, it is characterised in that

The first reset bias piece (52) is connected for one end with the pot lid body (10), the other end and the reset STATEMENT OF FEDERALLY SPONSORED (51) the first spring of rotation free end connection.

9. the pot lid component according to claim 3-6 any one, it is characterised in that the reset link gear is also wrapped Include：

To the lock (20) apply towards the latched position direction biasing force the second reset bias piece (53), for The lock (20) drives the lock (20) from the unlocked position to described sealed after the unlocked position departs from self-locking Position switches.

10. pot lid component according to claim 9, it is characterised in that

The second reset bias piece (53) is one end and the pot lid sheet of the unlocked position side of the lock (20) Body (10) is connected, the second spring that the other end is connected with the lock (20).

The 11. pot lid component according to claim 1-6 any one, it is characterised in that

The anchor switch is rotary switch (30), and the pot lid component also includes the connection rotary switch (30) and the lock Detain the switch drive of (20), the drive connection for realizing the rotary switch (30) and the lock (20).

12. pot lid components according to claim 11, it is characterised in that

The switch drive includes switch driving member (61), and one end of switch driving member (61) is used for and the knob Switch (30) is hinged, and the other end of switch driving member (61) is used to be hinged with the lock (20).

A kind of 13. kettles, including：

Pot lid component；

Kettle body (80), coordinates the pot lid component to use；

Characterized in that, the pot lid component is the pot lid component described in claim any one of 1-12；On the kettle body (80) The trigger architecture (82) corresponding with lock return unit (40) is provided with, the trigger architecture (82) is in the pot lid component Triggered during lid to the kettle body (80) it is described lock return unit (40) so that it is described lock return unit (40) from extended position to Retracted position switches.

14. kettles according to claim 13, it is characterised in that kettle body (80) correspondence lock (20) is provided with The button bit (81) coordinated with the lock (20).

15. kettles according to claim 14, it is characterised in that the trigger architecture (82) is to be arranged on the button bit (81) convex tendon of protrusions, the correspondence convex tendon is provided with the avoidance lock return unit along the pot lid component closing lid direction (40) escape groove (83).

16. kettles according to claim 15, it is characterised in that the convex tendon and/or the lock return unit (40) The guide structure that the guiding convex tendon coordinates with lock return unit (40) is provided with mating surface.