CN110273602B

CN110273602B - Latch device for electric door of baby carrier

Info

Publication number: CN110273602B
Application number: CN201910516651.9A
Authority: CN
Inventors: 陆利平
Original assignee: Zhejiang Jiajia Ride On Co ltd
Current assignee: Zhejiang Jiajia Ride On Co ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-10-23
Anticipated expiration: 2039-06-14
Also published as: CN110273602A

Abstract

The invention discloses a latch device for an electric door of a baby carrier, which comprises a door and a frame wall, wherein a latch and a first reset piece are arranged in the door; the lock rod is vertical to the moving direction of the bolt, and the bolt is provided with a lock groove; the linkage structure is connected with the ejector rod and the lock rod, and when the ejector rod is stressed to contract inwards, the ejector rod is contracted inwards to drive the ejector rod to move upwards through the linkage structure; when the reset is carried out, the ejector rod is ejected out and enters the slot, and the lock rod is retracted inwards and enters the lower part of the inner wall of the slot; the unlocking button is used for driving the lock rod to move out of the lock groove. The head of a family can control the state of bolt through locking mechanism, makes its lockable and can't be opened at will, avoids the child when leaving the head of a family's nurse, and the danger that the door dropped is opened to the accident, improves electronic bassinet's security.

Description

Latch device for electric door of baby carrier

Technical Field

The invention relates to a baby carriage, in particular to a latch device for an electric door of the baby carriage.

Background

The electric children's vehicle is one novel children's toy, and the children may drive alone or interact with each other.

The current market of children's vehicles generally has two functions: a normal forward and reverse travel function, and a roll-in-place function. Because children often learn to jump the car and other actions when watching video data, the design of the common baby carriage door is relatively simple (even no door exists), the baby carriage can be opened when the door is in a driving or swinging process, feet are difficult to stand stably when the baby carriage jumps down from the door, and the baby carriage is very easy to bend backwards or fall sideways. Therefore, there is a certain risk.

Disclosure of Invention

The invention aims to provide an electric door latch device of a baby carriage, which is characterized in that parents can control the state of a latch through a locking mechanism, so that the latch can be locked and cannot be opened randomly, the danger that the door of the baby carriage is opened accidentally and falls off when the baby carriage leaves the parents to attend is avoided, and the safety of the electric baby carriage is improved.

In order to realize the purpose of the invention, the invention adopts the following technical scheme: a latch device for an electric vehicle door of a baby carrier comprises the vehicle door and a vehicle frame wall, wherein a latch and a first reset piece for ejecting the latch are arranged in the vehicle door, a slot for the insertion of the latch is formed in the vehicle frame wall, a locking mechanism is arranged in the slot, the locking mechanism comprises a lock rod, a linkage structure, a push rod, an unlocking button and a second reset piece, the push rod faces the latch, and the push rod and the latch are coaxial; the locking rod is vertical to the moving direction of the bolt, and the upper surface or the lower surface of the bolt is provided with a locking groove for the locking rod to enter; the linkage structure is connected with the ejector rod and the lock rod, and when the ejector rod is stressed to contract inwards, the ejector rod is contracted inwards to drive the ejector rod to move upwards through the linkage structure; the second reset piece is used for resetting the lock rod, the linkage structure or the ejector rod or any of the lock rod, the linkage structure or the ejector rod, when in resetting, the ejector rod is popped up and enters the slot, the lock rod is inwards contracted and enters the lower part of the inner wall of the slot, and the stiffness coefficient of the second reset piece is smaller than that of the first reset piece; the unlocking button is connected to the lock rod, the linkage structure or the ejector rod and used for driving the lock rod to move out of the lock groove.

When the vehicle door is closed, the plug pin enters the slot, the plug pin extrudes the ejector rod under the action of the first reset piece, the second reset piece is compressed and contracted, the ejector rod contracts towards the inner side of the inner wall of the slot, and the linkage structure movably drives the ejector rod to enter the lock slot; when the unlocking button is pressed down, the lock rod is disengaged from the lock groove, and the ejector rod ejects the bolt outwards for a short distance.

Preferably, the linkage structure comprises a swing rod and a lifting frame, wherein a lifting transverse groove is arranged in the middle of the lifting frame and horizontally arranged, the middle of the swing rod is pivoted in the wall of the frame, the swing rod comprises a translation end and a lifting end, the translation end is connected to the ejector rod, the lifting end is arranged in the lifting transverse groove, and the lock rod is arranged above the lifting frame.

Preferably, the linkage structure comprises at least two parallel swing rods, an uplifting mechanism is arranged between the lifting ends of the two swing rods, the uplifting mechanism comprises a connecting rod, a plurality of pivots, a plurality of uplifting wheels and at least two sleeve heads, the sleeve heads are connected with the lifting ends of the swing rods, the connecting rod is connected with each sleeve head, the pivots are fixed on two sides of the connecting rod, the uplifting wheels are pivoted above the pivots and rotate freely on the pivots, the uplifting wheels are located in the uplifting transverse grooves and are in contact with the upper surfaces of the uplifting transverse grooves, and gaps are reserved between the sleeve heads and the upper surfaces of the uplifting transverse grooves.

Preferably, the lifting wheel and the lifting frame are both made of metal with the same hardness.

Preferably, the lock groove comprises an inner lock hole and an outward-extending opening, the inner lock hole corresponds to the lock rod in shape, the opening area of the outward-extending opening is larger than the cross-sectional area of the inner lock hole, and the outward-extending opening extends forwards towards the outer end of the bolt.

Preferably, the locking rod comprises a locking head, a locking seat and a locking spring, the locking head can stretch and move up and down relative to the locking seat, the locking spring is located between the locking seat and the locking head, and the locking seat is fixed with the linkage structure.

Preferably, the surface of the bolt contacted with the ejector rod is provided with a telescopic ball head, an elastic part for elastic expansion of the telescopic ball head is arranged in the telescopic ball head, the telescopic ball head is a spherical surface, and the edge of the telescopic ball head is positioned below the surface of the bolt.

Preferably, the bolt is made of plastic, and the telescopic ball head and the ejector rod are made of metal with the same hardness.

Preferably, the lock head and the bolt are both made of plastics with the same hardness.

Compared with the prior art, the electric vehicle door bolt device for the baby carrier has the following beneficial effects that:

when the door of the electric vehicle door latch device for the baby carrier is closed, the latch can extrude the ejector rod (because the elastic force of the first reset piece is greater than that of the second reset piece) after entering the slot, so that the linkage structure drives the lock rod to penetrate into the lock slot, the latch is locked by the lock rod, and at the moment, a child cannot pull the latch open through the door handle, namely, the door of the vehicle is in a completely locked state.

When a family is on the spot or a child needs to be put down from the baby carrier, the locking mechanism can be opened by pressing the unlocking button, the door handle is shifted to drive the bolt to be separated from the slot, and the car door can be opened.

Thirdly, owing to be provided with the second piece that resets, under normal conditions: the ejector pin is in the pop-up state, and the locking lever is in the retraction state, therefore when the door was closed the back, the bolt of door can automatic triggering locking mechanism, makes locking mechanism automatic start, need not manual opening, avoids the head of a family to forget, further improves the security.

Drawings

Fig. 1 is a schematic structural diagram of an electric door latch device 1 of a baby carriage according to an embodiment of the invention.

Fig. 2 is a schematic structural view of the lock mechanism in embodiment 1.

Fig. 3 is an active view of the lock mechanism in embodiment 1 (initial state a 1).

Fig. 4 is an active schematic view of the locking mechanism in embodiment 1 (touching state a 2).

Fig. 5 is an active view (pressed state a3) of the locking mechanism in embodiment 1.

Fig. 6 is an active view of the lock mechanism in embodiment 1 (locked state a 4).

Fig. 7 is a schematic structural view of a jack and a link mechanism in embodiment 1.

Fig. 8 is a schematic view of a half-section structure of the lock lever in embodiment 1.

Fig. 9 is a schematic structural view of the end of the plug in embodiment 1.

Fig. 10 is a sectional view of the end of the plug in example 1.

Fig. 11 is a schematic structural view of the uplift mechanism in embodiment 1.

Fig. 12 is a schematic structural view of the uplift mechanism in embodiment 1.

Fig. 13 is a disassembled schematic view of the uplift mechanism in the embodiment 1.

Fig. 14 is a schematic structural view of the unlocking button and the lifting frame in embodiment 1.

Fig. 15 is a schematic view of a half-sectional structure of the lock lever in embodiment 2.

Reference numerals: 1. a bolt; 10. a door handle; 11. a telescopic ball head; 12. locking the groove; 121. an inner lock hole; 122. an abduction opening;

2. a top rod; 21. a horizontal reset mechanism;

3. a swing rod; 30. an uplifting mechanism; 300. sleeving heads; 301. lifting the wheel; 302. a connecting rod; 303. a pivot; 304. a limit rivet; 31. a translation end; 32. a lifting end;

4. a lifting frame; 40. a lock lever; 400. a lock head; 401. a lock seat; 402. a lock spring; 41. lifting the transverse groove; 42. a vertical reset mechanism; 420. a spring fixing frame; 421. a limiting column; 43. pushing the inclined plane;

5. an unlocking button; 50. a push block; 6. a vehicle door; 7. a frame wall;

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

The electric door latch device of the baby carrier shown in fig. 1 to 14 comprises a vehicle door 6 and a vehicle frame wall 7, wherein a latch 1 and a first reset piece for ejecting the latch 1 are arranged in the vehicle door 6, a slot for allowing the latch 1 to enter is arranged in the vehicle frame wall 7, a locking mechanism is arranged in the slot, the locking mechanism comprises a lock rod 40, a linkage structure, a push rod 2, an unlocking button 5 and a second reset piece, the push rod 2 faces the latch 1, and the push rod 2 is coaxial with the latch 1; the lock rod 40 is vertical to the moving direction of the bolt 1, and the lower surface of the bolt 1 is provided with a lock groove 12 for the lock rod 40 to enter; the linkage structure is connected with the ejector rod 2 and the lock rod 40, and when the ejector rod 2 is stressed to contract inwards, the ejector rod 2 is contracted inwards to drive the ejector rod 2 to move upwards through the linkage structure.

The second piece that resets is used for locking lever 40, linkage and ejector pin 2 to reset, and the second piece that resets includes a plurality of horizontal return mechanisms 21 and vertical return mechanism 42, and the spring in the horizontal return mechanism 21 is fixed in ejector pin 2 rear end to ejecting ejector pin 2 towards the slot through elasticity. The vertical reset mechanism 42 is provided with two positions, which are respectively arranged above the two sides of the lifting frame 4 and used for pressing the lifting frame 4 downwards so as to ensure that the lock rod 40 on the lifting frame 4 can keep the inward-contracting state. Therefore, under the action of the second reset piece, the top rod 2 is ejected into the slot, and the locking rod 40 is retracted inwards to enter the lower part of the inner wall of the slot.

The stiffness coefficient of the second resetting piece is smaller than that of the first resetting piece, so that when the bolt 1 enters the slot, the ejector rod 2 can be easily pressed into the slot wall, and the lock rod 40 is upwards popped to enter the lock slot 12; the second reset piece in this embodiment plays a role mainly to ensure that when the whole locking mechanism is not stressed, the top rod 2 pops out of the lock rod 40 and retracts, so as to avoid the lock rod 40 from popping out accidentally to block the movement of the bolt 1.

The linkage structure comprises a swing rod 3 and a lifting frame 4, wherein the middle part of the lifting frame 4 is provided with a lifting transverse groove 41, the lifting transverse groove 41 is horizontally arranged, the middle part of the swing rod 3 is pivoted in the frame wall 7, the swing rod 3 comprises a translation end 31 and a lifting end 32, the translation end 31 is connected to the ejector rod 2, the lifting end 32 is arranged in the lifting transverse groove 41, and the lock rod 40 is arranged above the lifting frame 4.

In the process of the bolt 1 moving, the lock groove 12 on the bolt 1 is not aligned with the lock rod 40, and at this time, the lock rod 40 is driven by the linkage structure to movably protrude, and is likely to abut against the side wall of the bolt 1 and cannot move further, so that in order to avoid the possible locking phenomenon of the bolt 1, the lock rod 40 in the embodiment adopts an elastically telescopic split structure. As shown in fig. 8, the lock rod 40 comprises a lock head 400, a lock seat 401 and a lock spring 402, wherein the lock head 400 can be moved up and down relative to the lock seat 401, the lock spring 402 is positioned between the lock seat 401 and the lock head 400, and the lock seat 401 is fixed with the lifting frame 4. Therefore, when the lock groove 12 of the latch 1 is not aligned with the lock rod 40, the locking head 400 of the lock rod 40 abuts against the side wall of the latch 1 and is contracted, and after the latch 1 is completely reached, the locking head 400 enters the lock groove 12 under the elastic restoring force of the lock spring 402.

Referring to fig. 3 to 6, when the door 6 is closed, the process of the latch 1 entering the slot until it is ejected to contact the bottom of the slot is as follows:

initial state a 1: in the slot had just entered into to bolt 1, bolt 1 did not contact ejector pin 2, and ejector pin 2 is in unstressed state, and under horizontal canceling release mechanical system 21 and vertical canceling release mechanical system 42's effect, ejector pin 2 outwards pops out, and crane 4 moves down to the lowest, and locking lever 40 is in natural extension state, and lock seat 401 is located the lowest, and tapered end 400 is under the effect of lock spring 402 and the interval is the biggest between lock seat 401.

Touch state a 2: the bolt 1 moves further until it contacts the top bar 2 (since the outer end of the top bar 2 is above the locking bar 40 when the top bar 2 is ejected), and the outer end of the bolt 1 is above the top bar 40.

Pressing state A3: the bolt 1 begins to extrude the ejector rod 2, the ejector rod 2 is pressed to contract inwards to extrude the horizontal reset mechanism 21, the translation end 31 of the swing rod 3 swings towards the left lower side, the lifting end 32 of the swing rod 3 swings towards the right upper side, the lifting end 32 moves rightwards along the upper lifting transverse groove 41 and takes up the whole lifting frame 4 upwards, the lock seat 401 of the lock rod 40 moves upwards together until the lock head 400 abuts against the side wall of the bolt 1, the lock spring 402 is compressed, and the lock rod 40 is shortened.

Locked state a 4: bolt 1 extrudees ejector pin 2 inwards to the maximum distance, and the keyway 12 aims at locking lever 40 this moment, and lock 400 enters into keyway 12 under the elastic force of lock spring 402 and accomplishes the locking, stirs door handle 10 this moment, and bolt 1 is hindered unable removal, therefore children can't open the door.

As shown in fig. 7, the linkage structure includes two parallel swing rods 3, and an upward lifting mechanism 30 is disposed between the lifting ends 32 of the two swing rods 3. As shown in fig. 11 to 13, the lifting mechanism 30 includes a connecting rod 302, a plurality of pivots 303, a plurality of lifting wheels 301, and two heads 300, wherein the heads 300 are pivotally connected to the lifting end 32 of the swing rod 3, the connecting rod 302 connects the two heads 300, the pivots 303 are fixed to two sides of the connecting rod 302, the lifting wheels 301 are pivotally connected to the pivots 303, and the lifting wheels 301 are fixed to the pivots 303 by means of limit rivets 304, and the lifting wheels 301 can freely rotate on the pivots 303.

The lifting wheel 301 is positioned in the lifting transverse groove 41, the lifting wheel 301 is in contact with the upper surface of the lifting transverse groove 41, when the lifting mechanism 30 moves horizontally along the lifting transverse groove 41 and is lifted upwards, the rolling friction of the lifting wheel 301 reduces the moving resistance when lifted, meanwhile, the abrasion between the lifting transverse grooves 41 is reduced, the lifting wheel 301 and the lifting frame 4 are made of stainless steel with the same hardness (the overall strength and the abrasion resistance are improved, the relative abrasion is reduced), and the service life of the whole linkage structure is prolonged.

The sleeve head 300 is tubular, and the diameter of the sleeve head 300 is smaller than that of the lifting wheel 301, so that when the lifting wheel 301 contacts the lifting transverse groove 41, a gap is reserved between the sleeve head 300 and the upper surface of the lifting transverse groove 41, and the sleeve head 300 is prevented from contacting the lifting transverse groove 41 to be worn.

As shown in fig. 9 and 10, the surface of the bolt 1 contacting the ejector rod 2 is provided with a telescopic ball 11, the telescopic ball 11 is internally provided with a spring for elastic expansion, when the bolt 1 impacts the ejector rod 2, the telescopic ball 11 directly contacts the ejector rod 2, the spring behind the telescopic ball 11 deforms to absorb the shock and impact energy generated by impact, so as to reduce the deformation and fragmentation of the bolt 1 (the bolt 1 is generally made of plastic), if the bolt 1 directly impacts the ejector rod 2, the shock generated during impact is large, and the end of the bolt 1 is easy to deform or crack. In the embodiment, the telescopic ball 11 and the mandril 2 are both made of stainless steel with the same hardness.

As shown in fig. 10, the ball 11 is spherical, the transition from the edge to the middle of the spherical ball 11 is mild, and the edge of the ball 11 is located below the surface of the bolt 1, so when the door closing bolt 1 contacts the frame wall 7, the blocking of the ball 11 is smaller and there is a transition curved surface, and the bolt is easier to pass when the door is closed. If the ball 11 is replaced with a cylindrical shape, the edge of the ball will protrude beyond the bolt, and the ball will easily hit or jam against the threshold when the door is closed.

As shown in fig. 10, the lock groove 12 includes an inner lock hole 121 and a flared opening 122, the inner lock hole 121 corresponds to the shape of the lock bar 40, the flared opening 122 has an opening area larger than the cross-sectional area of the inner lock hole 121, and the flared opening 122 is flared forward toward the outer end of the bolt 1. When the lock head 400 is ejected to enter the flared opening 122, the tapered side wall is arranged at the flared opening, so that the lock head 400 can slowly enter the inner lock hole 121, and excessive noise and vibration caused by the fact that the lock head 400 is ejected to the inner lock hole 121 too fast are avoided.

In the present embodiment, the door handles 10 are disposed on both sides of the door 6, i.e. the bolt 1 can be operated by adults and children, while the unlocking button 5 is disposed on the outer side of the frame wall 7, mainly for controlling the locking mechanism by adults.

As shown in fig. 14, the lifting frame 4 is provided with a push inclined surface 43, a push block 50 is arranged at the rear side of the unlocking button 5, the push block 50 is aligned with the push inclined surface 43, when the unlocking button 5 is pressed down, the whole lifting frame 4 is pushed downwards through the push block 50 and the push inclined surface 43, so that the lock rod 40 moves downwards to the unlocking groove 12 (the ejector rod 2 pushes the bolt 1 out by a small section), at the moment, the bolt 1 is in an unrestricted state, and the door 6 can be opened by pulling the bolt 1 backwards through the door handle 10.

By controlling the state of the unlocking button 5 (for example, by additionally providing a limiting mechanism on the outer side of the unlocking button 5, the unlocking button 5 is set to be in a continuously pressed state for fastening), whether the locking mechanism is used or not can be selected. At the moment, the ejector rod 2 extends out of the slot, even if the bolt 1 impacts the ejector rod 2, the ejector rod 2 is locked, so that the locking mechanism cannot work, and the locking mechanism is suitable for parents or children with relatively older ages.

Example 2

In this embodiment, based on embodiment 1, a ball group is added to the top of the lock head 400 to reduce friction.

As shown in fig. 15, the top end of the lock head 400 is provided with an outer ball 403 and an inner ball 404, the position of the outer ball 403 is consistent with the direction of the flared opening 122, and the diameter of the outer ball 403 is larger than that of the inner ball 404.

The outer balls 403 contact the angled sidewalls at the flared mouth 122 as the lock cylinder 400 enters the lock slot 12, reducing one-sided wear of the lock cylinder 400, and the outer balls 403 also reduce friction between the lock cylinder 400 and the latch 1 when in the depressed state a 3.

The inner side of the outer ball 403 is supported by the inner ball 404, and the friction force applied to the inner side of the outer ball 403 is reduced.

The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The utility model provides an electronic door bolt device of bassinet, includes door (6) and frame wall (7), is equipped with bolt (1) in door (6) and is used for the first piece that resets that bolt (1) popped out, and frame wall (7) are equipped with the slot that is used for bolt (1) to get into, its characterized in that: a locking mechanism is arranged in the slot, the locking mechanism comprises a locking rod (40), a linkage structure, a top rod (2), an unlocking button (5) and a second reset piece,

-the ejector pin (2) faces the plug pin (1), and the ejector pin (2) is coaxial with the plug pin (1);

the locking rod (40) is perpendicular to the moving direction of the bolt (1), and the upper surface or the lower surface of the bolt (1) is provided with a locking groove (12) for the locking rod (40) to enter;

the linkage structure is connected with the ejector rod (2) and the lock rod (40), when the ejector rod (2) is stressed to contract inwards, the ejector rod (2) contracts inwards to drive the lock rod (40) to move upwards through the linkage structure;

-a second reset member for resetting the locking bar (40), the linkage structure or the ejector bar (2) or any of them, wherein during resetting, the ejector bar (2) is ejected into the slot, the locking bar (40) is retracted inwards to enter below the inner wall of the slot, and the stiffness coefficient of the second reset member is smaller than that of the first reset member;

-the unlocking button (5) is connected to the locking bar (40), the linkage structure or the ejector rod (2), the unlocking button (5) is used for driving the locking bar (40) to move out of the locking groove (12);

when the vehicle door (6) is closed, the bolt (1) enters the slot, the bolt (1) extrudes the ejector rod (2) under the action of the first reset piece, the second reset piece is compressed to shrink, the ejector rod (2) shrinks towards the inner side of the inner wall of the slot, and the linkage structure movably drives the lock rod (40) to enter the lock slot (12);

when the unlocking button (5) is pressed down, the lock rod (40) is released from the lock groove (12), and the ejector rod (2) ejects the bolt (1) outwards for a short distance.

2. The stroller electric door latch apparatus of claim 1, characterized in that: linkage structure includes pendulum rod (3) and crane (4), and crane (4) middle part is equipped with and lifts horizontal groove (41), and it sets up to lift horizontal groove (41) level, pendulum rod (3) middle part pin joint is in frame wall (7), and pendulum rod (3) are including translation end (31) and lift end (32), translation end (31) are connected in ejector pin (2), and lift end (32) are arranged in and are lifted horizontal groove (41), and crane (4) top is located to locking lever (40).

3. The stroller electric door latch apparatus of claim 2, characterized in that: the linkage structure comprises at least two parallel swing rods (3), an upward lifting mechanism (30) is arranged between lifting ends (32) of the swing rods (3), the upward lifting mechanism (30) comprises a connecting rod (302), a plurality of pivots (303), a plurality of upward lifting wheels (301) and at least two sleeve heads (300), the sleeve heads (300) are connected with the lifting ends (32) of the swing rods (3), the connecting rod (302) is connected with each sleeve head (300), the pivots (303) are fixed on two sides of the connecting rod (302), the upward lifting wheels (301) are pivoted above the pivots (303), the upward lifting wheels (301) freely rotate on the pivots (303), the upward lifting wheels (301) are located in the upward lifting transverse grooves (41), the upward lifting wheels (301) are in contact with the upper surfaces of the upward lifting transverse grooves (41), and gaps are reserved between the sleeve heads (300) and the upper surfaces of the upward lifting transverse grooves (41).

4. The stroller electric door latch apparatus of claim 3, wherein: the lifting wheel (301) and the lifting frame (4) are made of metal with the same hardness.

5. The stroller electric door latch apparatus of claim 1, characterized in that: the lock groove (12) comprises an inner lock hole (121) and an outward opening (122), the inner lock hole (121) corresponds to the lock rod (40) in shape, the opening area of the outward opening (122) is larger than the section area of the inner lock hole (121), and the outward opening (122) is opened forwards towards the outer end of the bolt (1).

6. A stroller electric door latch apparatus according to claim 1 or 5, characterized in that: the lock rod (40) comprises a lock head (400), a lock seat (401) and a lock spring (402), the lock head (400) can stretch up and down relative to the lock seat (401), the lock spring (402) is located between the lock seat (401) and the lock head (400), and the lock seat (401) is fixed with the linkage structure.

7. The stroller electric door latch apparatus of claim 1, characterized in that: the surface that bolt (1) and ejector pin (2) contact is equipped with flexible bulb (11), and flexible bulb (11) inside is equipped with the elastic component that is used for its elasticity to stretch out and draw back, and flexible bulb (11) are the sphere, the edge of flexible bulb (11) is located the below on place bolt (1) surface.

8. The stroller electric door latch apparatus of claim 7, wherein: the bolt (1) is made of plastic, and the telescopic ball head (11) and the ejector rod (2) are both made of metal with the same hardness.

9. The stroller electric door latch apparatus of claim 6, wherein: the lock head (400) and the bolt (1) are both made of plastics with the same hardness.