CN219487258U - Retractable back rest and child safety seat - Google Patents

Abstract

The utility model belongs to the technical field of child seats, and provides a telescopic backrest and a child safety seat, which comprises the following components: the chair back is provided with a containing cavity, the containing cavity is uniformly provided with locking grooves along the vertical direction, and the locking grooves are communicated with the containing cavity; the headrest, its sliding connection is in holding the intracavity, is connected with the movable block that can follow its length direction and is the locking piece that the contained angle set up with the movable block on the headrest, and the movable block is provided with the traction groove along its thickness direction, and the traction groove becomes the oblique angle setting with the movable block, and locking piece activity cartridge is located the locking groove, and the one end activity joint in traction inslot of locking groove is kept away from to the locking piece. Compared with the prior art, the headrest has the advantages that the moving block is arranged on the headrest, the traction groove which is oblique to the moving block is arranged on the moving block, the locking block is movably clamped with the traction groove, the unlocking and locking of the locking block can be realized by moving the moving block along the length direction of the headrest, the structure is simple, the installation is convenient, and the production cost is saved.

Description

Retractable back rest and child safety seat

Technical Field

The utility model belongs to the technical field of child seats, and particularly relates to a telescopic backrest and a child safety seat.

Background

With the rapid development of the age, every household almost has own home automobile, and in order to raise the safety of children when riding, it is also important to install a child seat.

The existing child safety seats are divided into different sizes so as to be suitable for babies with different ages, heights and weights, and along with the growth of the babies, the telescopic child safety seats are arranged in our lives, but unlocking devices designed in the child safety seats are generally complex, the unlocking process is relatively complicated, meanwhile, the time and the labor are consumed in the installation process of workers, and the material consumption is increased, so that the production cost is increased.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problems to be solved by the utility model are as follows: the utility model provides a through set up rather than being the draw-in groove of oblique angle on the movable block, locking piece and draw-in groove activity joint utilize the movable block to remove along headrest length direction can realize the unblock and the locking of locking piece, simple structure, simple to operate practices thrift manufacturing cost's scalable back and children's safety seat.

The technical scheme adopted by the utility model for solving the technical problems is that the utility model provides a telescopic backrest, which comprises: the chair back is provided with a containing cavity, locking grooves are uniformly distributed in the vertical direction in the containing cavity, and the locking grooves are communicated with the containing cavity;

the headrest is connected in the accommodating cavity in a sliding way, a moving block capable of moving along the length direction of the headrest and a locking block arranged at an included angle with the moving block are connected to the headrest, a traction groove is formed in the thickness direction of the moving block, the traction groove and the moving block are arranged at an oblique angle, the locking block is movably inserted into the locking groove, and one end, far away from the locking groove, of the locking block is movably clamped in the traction groove;

when the moving block moves along the length direction of the headrest, the traction groove is used for driving the locking block to be separated from the locking groove until the headrest moves to a preset position, and the traction groove pushes the locking block to be inserted into the locking groove to limit the headrest to move.

In the telescopic backrest, the moving block comprises a first installation part and a second installation part, a bending part is formed between the first installation part and the second installation part, and an installation hole is formed in the headrest;

when the moving block penetrates through the mounting hole until the bending part is located in the mounting hole, the first mounting part is used for being movably connected with the locking block, and the second mounting part is used for extending into the headrest.

In the above-mentioned telescopic backrest, the first installation portion is provided with at least one first guide way along its length direction, be equipped with first stopper on the headrest, first stopper with first guide way activity joint.

In the telescopic backrest, the headrest is provided with the pressing plate connected through the fixing piece, the first installation part is provided with the first limit groove, and the pressing plate is used for being pressed in the first limit groove and located above the locking block to prevent the locking block and the first installation part from being separated from the outside of the headrest.

In the telescopic backrest, the headrest is provided with the second guide groove along the width direction of the headrest, and the locking block is movably clamped in the second guide groove.

In the above-mentioned telescopic back, the second guide slot includes block groove and second spacing groove, be equipped with the second stopper on the locking piece, just the locking piece activity sets up in the block groove, the second stopper activity sets up in the second spacing groove.

In the above-mentioned telescopic backrest, the locking block is further provided with a locking block, the traction groove and the first installation portion are arranged at an oblique angle, and the locking block is movably locked in the traction groove.

In the telescopic backrest, an armrest groove is formed in one end, far away from the first installation portion, of the second installation portion, a through hole is formed in the headrest, and the armrest groove coincides with the through hole.

In the telescopic backrest, the second installation part is provided with the installation seat, the installation seat is connected with the elastic piece, the headrest is provided with the installation groove, and the end part, away from the installation seat, of the elastic piece is propped against in the installation groove.

The utility model solves the technical problems by adopting the technical scheme that the utility model also provides a child safety seat, which comprises one of the telescopic backrest.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the telescopic backrest and the child safety seat, the locking groove is formed in the vertical direction of the backrest, the headrest is slidably connected in the accommodating cavity of the backrest, the accommodating cavity is communicated with the locking groove, the headrest is provided with the movable block capable of moving along the length direction of the headrest, the locking block arranged at an included angle with the movable block and the traction groove arranged on the movable block and arranged at an oblique angle with the movable block, the telescopic backrest and the child safety seat are simple in structure, the use of materials is reduced, the production cost is reduced, when the movable block moves along the length direction of the headrest, the traction groove on the movable block is used for pushing the locking block to be separated from the locking groove, when the headrest is adjusted to a required position, the traction groove can push the locking block to be inserted in the locking groove to limit the headrest to move in the vertical direction, and the locking block can be separated from or inserted in the locking groove by virtue of the movable block and the traction groove on the movable block in the two state conversion processes, so that the telescopic backrest can be conveniently and rapidly unlocked and locked, and the installation mode of the telescopic backrest is simplified, and the work efficiency of workers is improved.

(2) The elastic piece that mount pad is connected on the second installation department supports and leans on in the mounting groove on the headrest, be favorable to the movable block to remove along its length direction and drive the locking piece and break away from the lock joint groove and realize the unblock through the traction groove, the movable block also can make the elastic piece shrink, and when adjusting to required height, can drive the movable block under the reset action of elastic piece and reset, make the traction groove promote the movement of locking piece plug-in at lock joint inslot restriction headrest through the removal of movable block promptly, easy operation relies on the elastic piece to realize automatic locking after adjusting to required position.

(3) The clamp plate of connecting through the mounting on the headrest compresses tightly the top in the first spacing groove on first installation department and be located the locking piece through the clamp plate, and the design of headrest top clamp plate is favorable to preventing that movable block and locking piece from appearing breaking away from the outer phenomenon of headrest in the removal in-process, ensures that locking piece and locking groove remain fluency at unblock and locking state in-process that switches.

Drawings

FIG. 1 is a perspective view of the present retractable back rest and child safety seat;

FIG. 2 is a cross-sectional view of the chair back;

FIG. 3 is a view of the mounting structure of the moving block and the lock block on the headrest;

fig. 4 is a structural view of the headrest;

FIG. 5 is a view of the mounting structure between the moving block and the locking block;

fig. 6 is a view of a mounting mechanism between the second mounting portion and the headrest.

In the figure, 1, a chair back; 10. a receiving chamber; 11. a locking groove;

2. a headrest; 20. a mounting hole; 21. a through hole; 22. a mounting groove; 23. a first limiting block; 24. a pressing plate; 25. a second guide groove; 250. a clamping groove; 251. the second limit groove; 252. a limiting surface;

3. a moving block; 30. a traction groove; 31. a first mounting portion; 310. a first guide groove; 32. a second mounting portion; 320. a handrail groove; 321. a mounting base; 322. an elastic member; 323. a first limit groove; 33. a bending portion;

4. a locking block; 40. a second limiting block; 41. and a clamping block.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, the present solution is mainly described in detail with respect to a retractable backrest used in a child safety seat, but the present retractable backrest is not limited to the case of being incorporated in a child safety seat, and can be applied to other seats, such as a seat rest in life.

As shown in fig. 1 to 6, the retractable backrest comprises: the chair back 1 is provided with a containing cavity 10, the containing cavity 10 is uniformly provided with locking grooves 11 along the vertical direction, and the locking grooves 11 are communicated with the containing cavity 10; the headrest 2 is slidably connected in the accommodating cavity 10, the headrest 2 is connected with a moving block 3 capable of moving along the length direction of the headrest and a locking block 4 arranged at an included angle with the moving block 3, the moving block 3 is provided with a traction groove 30 along the thickness direction of the moving block, the traction groove 30 and the moving block 3 are arranged at an oblique angle, the locking block 4 is movably inserted into the locking groove 11, and one end, far away from the locking groove 11, of the locking block 4 is movably clamped in the traction groove 30; when the moving block 3 moves along the length direction of the headrest 2, the traction groove 30 is used for driving the locking block 4 to be separated from the locking groove 11 until the headrest 2 moves to a preset position, and the traction groove 30 pushes the locking block 4 to be inserted into the locking groove 11 to limit the headrest 2 to move.

According to the utility model, the accommodating cavity 10 is arranged on the chair back 1, the locking groove 11 is communicated in the accommodating cavity 10, the headrest 2 is slidably arranged in the accommodating cavity 10, the moving block 3 is arranged on the headrest 2 along the length direction of the headrest 2, and the movable locking block 4 is arranged on the headrest 2, so that the state switching between unlocking and locking of the locking block 4 and the locking groove 11 can be realized through the traction groove 30 when the moving block 3 moves along the length direction of the headrest 2 by utilizing the movable clamping of the traction groove 30 on the moving block 3, the unlocking structure is simplified, the device is more convenient and faster for workers to install, the working efficiency is improved, and meanwhile, the loss of materials in the manufacturing process of the device is also reduced, and the production cost is saved; and for the state switching of unblock and locking, need when movable block 3 moves along headrest 2 length direction, utilize traction groove 30 and locking piece 4 activity joint for the locking piece 4 is broken away from locking groove 11 through traction groove 30 promotion when movable block 3 moves, when headrest 2 moves to the preset position, promptly along with headrest 2, movable block 3 and locking piece 4 move to the required height, traction groove 30 on movable block 3 can promote locking piece 4 to insert and establish in the locking groove 11 of corresponding height, restrict the removal of headrest 2 in this way, avoided this back to appear along vertical direction's condition under the vibrations condition headrest 2.

Further, the locking grooves 11 can preferably adopt two rows which are symmetrically arranged, and each row is uniformly provided with a plurality of locking grooves 11, so that the backrest can realize adjustment of a plurality of heights, children of different age groups can be conveniently used, the locking blocks 4 can be symmetrically arranged in the same way, namely, the symmetrically arranged locking blocks 4 are respectively inserted into the locking grooves 11 on two sides, the stability of the headrest 2 at different heights is realized, and the headrest 2 is prevented from being displaced due to shaking.

Further, the traction groove 30 is formed along the thickness direction of the moving block 3, so that in the installation process, the locking block 4 can be firstly installed on the moving block 3, then the moving block 3 is installed on the headrest 2, the locking block 4 is movably clamped with the traction groove 30 on the moving block 3, and the installation of workers is convenient while the space is saved.

It should be noted that, the above-mentioned locking piece 4 is the contained angle setting with the movable block 3, its contained angle scope can be according to specific unblock and locking device and design selection between acute angle and right angle, this scheme preferably adopts locking piece 4 to be the right angle setting with the movable block 3, and then reduce the travel when locking piece 4 unblock and locking, and similarly, in the case that locking piece 4 is the right angle setting with the movable block 3, for realizing that locking piece 4 produces the displacement along the direction of perpendicular to movable block 3, traction groove 30 on the movable block 3 is the oblique angle setting with the movable block 3 itself, and the oblique angle setting here only has the oblique angle to be under the condition of acute angle, namely traction groove 30 and locking piece 4 between the same contained angle, traction groove 30 moves in step when movable block 3 moves like this, because locking piece 4 and traction groove 30 activity joint, so traction groove 30 can promote the activity joint department with locking piece 4 when moving, and then drive locking piece 4 and realize unblocking and locking in the course.

As shown in fig. 4 to 5, the moving block 3 includes a first mounting portion 31 and a second mounting portion 32, a curved portion 33 is formed between the first mounting portion 31 and the second mounting portion 32, and the headrest 2 is provided with a mounting hole 20; when the moving block 3 penetrates the mounting hole 20 until the bending portion 33 is located in the mounting hole 20, the first mounting portion 31 is used for movably connecting with the locking block 4, and the second mounting portion 32 is used for extending into the headrest 2.

In order to reduce the use on the material and can drive the locking piece 4 to realize unlocking and locking, divide into first installation department 31 and second installation department 32 with whole movable block 3, be formed with the curved surface between first installation department 31 and the second installation department 32, first installation department 31 and second installation department 32 are in different planes promptly, in the in-process of installing movable block 3 on headrest 2, the mounting hole 20 on headrest 2 is run through that relies on the curved part 33 to make first installation department 31 or second installation department 32 easier, the installation effectiveness has been promoted, let first installation department 31 and locking piece 4 movable joint simultaneously, realize that the removal of movable block 3 drives locking piece 4 and accomplish unlocking and locking, extend second installation department 32 into headrest 2, the condition that the life is influenced in the movable block 3 bending because of breaking away from outside headrest 2 has been avoided to second installation department 32.

As shown in fig. 6, an end of the second mounting portion 32 remote from the first mounting portion 31 is provided with an armrest groove 320, the headrest 2 is provided with a through hole 21, and the armrest groove 320 coincides with the through hole 21.

The whole movable block 3 that is in the aforesaid is equivalent to the drive source that locking piece 4 and lock connect the groove 11 to unlock and lock, because the second installation department 32 extends to in the headrest 2, and the second installation department 32 is close to the top position of headrest 2, through carrying out the coincidence with the through-hole 21 on headrest 2 with the handrail recess 320 on the second installation department 32, when carrying out the altitude mixture control to this back, the user can stretch into in the handrail recess 320 with the hand, through removing movable block 3 along headrest 2 length direction, realize the back and reach required altitude mixture control position, easy operation, the experience of user of being convenient for promotes, it is to say, be in the accommodation chamber 10 when locking piece 4 and lock connect the groove 11 to carry out the unblock with the top position of headrest 2 like this, prevent that external dust impurity from getting into and influence the life of this back, and set up the second installation department 32 at the back of this back, because be equipped with recess 320 on the second installation department 32, and carry out the motion with the headrest 2 along headrest 2 length direction and remove, realize the back and reach required altitude mixture control position, the user's experience is in the back is close to the headrest 2, the back is in the back is carried out to this back to the headrest 2 through the recess of this back of being convenient for the back, the back is carried out the back is in the back of this back of rest 2 to the back of the user's side of the user's of being close to the headrest to the position of the user.

Further, because the whole movable block 3 corresponds to a driving source, the driving part is arranged on the headrest 2, and the driving end of the driving part is connected with the movable block 3, so that the distance that the movable block 3 moves along the length direction of the movable block is realized, the locking block 4 can be more accurately inserted into the locking groove 11 with the required height, the height adjustment of the automatic headrest 2 is realized, and the automatic headrest 2 is more convenient and quick.

The second mounting portion 32 is provided with a mounting seat 321, an elastic piece 322 is connected to the mounting seat 321, the headrest 2 is provided with a mounting groove 22, and the end portion, away from the mounting seat 321, of the elastic piece 322 abuts against the inside of the mounting groove 22.

When the movable block 3 drives the locking block 4 to separate from the locking groove 11 through the traction groove 30, and the headrest 2 moves to the required height, as the elastic piece 322 is arranged on the mounting seat 321 of the second mounting part 32, one end of the elastic piece 322, which is far away from the mounting seat 321, is abutted against the inside of the mounting groove 22 of the headrest 2, so that when the movable block 3 moves upwards along the length direction of the headrest 2, the elastic piece 322 is compressed, the traction groove 30 on the movable block 3 drives the locking block 4 to separate from the locking groove 11, and when the headrest 2 moves to the required height, the elastic reset of the elastic piece 322 drives the movable block 3 to displace along the length direction of the headrest 2, and then the traction groove 30 pushes the locking block 4 to be inserted in the locking groove 11 to complete the movement restriction of the headrest 2.

As shown in fig. 3 to 6, the first mounting portion 31 is provided with at least one first guide groove 310 along a length direction thereof, the headrest 2 is provided with a first stopper 23, and the first stopper 23 is movably clamped with the first guide groove 310.

The first installation department 31 is last to be provided with a department first guide slot 310 at least, and first guide slot 310 sets up along the length direction of movable block 3, through with the first stopper 23 activity joint on the headrest 2 in first guide slot 310, when guaranteeing to remove along headrest 2 length direction in this way movable block 3, first guide slot 310 can carry out the displacement for first stopper 23, first stopper 23 can only remove between the both ends of first guide slot 310 promptly, and then the distance that restriction movable block 3 removed along headrest 2 length direction, avoid movable block 3 because of the too big and cause the influence to lock 4 and lock groove 11 in the efficiency of unblock and locking because of the travel distance.

The headrest 2 is provided with a pressing plate 24 connected through a fixing piece, the first installation part 31 is provided with a first limit groove 323, and the pressing plate 24 is used for being pressed in the first limit groove 323 and located above the locking block 4 to prevent the locking block 4 and the first installation part 31 from being separated from the headrest 2.

In order to further ensure that the locking block 4 and the first mounting portion 31 cannot be separated from the headrest 2 in the moving process, the first mounting portion 31 is provided with the first limiting groove 323, the pressing plate 24 is pressed in the first limiting groove 323, and because the first limiting groove 323 is arranged at two sides of the width direction of the first mounting portion 31, a part of the pressing plate 24 is pressed in the first limiting groove 323, and the other part of the pressing plate 24 is positioned above the locking block 4, that is, certain gaps exist between the locking block 4 and the pressing plate 24 and between the first limiting groove 323 on the first mounting portion 31 and the pressing plate 24, so that the smoothness in moving the locking block 4 and the first mounting portion 31 is ensured, after the position of the pressing plate 24 is determined, the pressing plate 24 can be fixed on the headrest 2 through fixing pieces.

The headrest 2 is provided with a second guide groove 25 along the width direction thereof, and the locking block 4 is movably clamped in the second guide groove 25.

Because the second guide way 25 sets up along the width direction of headrest 2, movable block 3 sets up along the length direction of headrest 2, has realized promptly that there is the right angle setting between above-mentioned well locking piece 4 and the movable block 3, and locking piece 4 activity joint is in second guide way 25, is favorable to locking piece 4 to all can realize rectilinear movement along the direction of second guide way 25 when breaking away from or inserting in locking groove 11, has guaranteed the smoothness nature of this back when two state switches of unblock and locking.

The second guide groove 25 comprises a clamping groove 250 and a second limiting groove 251, the locking block 4 is provided with a second limiting block 40, the locking block 4 is movably arranged in the clamping groove 250, and the second limiting block 40 is movably arranged in the second limiting groove 251.

The second guide groove 25 is divided into an engaging groove 250 and a second limiting groove 251, the second limiting groove 251 and the engaging groove 250 are not offset when the locking block 4 moves, a limiting surface 252 is formed between the engaging groove 250 and the second limiting groove 251, when the second limiting block 40 on the locking block 4 moves in the second limiting groove 251 and abuts against the limiting surface 252, the locking state of the locking block 4 and the locking groove 11 is realized at this time, and in the unlocking process, the symmetrically arranged second limiting grooves 251 are mutually communicated, so that the position interference of the two locking blocks 4 and the second limiting block 40 on the locking block 4 is avoided when the second limiting block 40 moves in the direction away from the limiting surface 252, and the unlocking function of the locking block 4 is ensured when the locking block 4 is separated from the locking groove 11.

The locking block 4 is also provided with a clamping block, the traction groove 30 and the first installation part 31 are arranged at an oblique angle, and the clamping block is movably clamped in the traction groove 30.

The movable clamping of the clamping block is in the traction groove 30, under the condition that the traction groove 30 and the first installation portion 31 are in oblique angle arrangement, the movement of the first installation portion 31 drives the traction groove 30 to move along the length direction of the headrest 2, and then the movable clamping block in the traction groove 30 is pushed to move along the direction of the traction groove 30, and the locking block 4 is separated from or inserted into the locking groove 11 in the moving process to achieve the unlocking and locking functions.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Claims (10)

1. A retractable backrest, comprising:

the chair back is provided with a containing cavity, locking grooves are uniformly distributed in the vertical direction in the containing cavity, and the locking grooves are communicated with the containing cavity;

the headrest is connected in the accommodating cavity in a sliding way, a moving block capable of moving along the length direction of the headrest and a locking block arranged at an included angle with the moving block are connected to the headrest, a traction groove is formed in the thickness direction of the moving block, the traction groove and the moving block are arranged at an oblique angle, the locking block is movably inserted into the locking groove, and one end, far away from the locking groove, of the locking block is movably clamped in the traction groove;

when the moving block moves along the length direction of the headrest, the traction groove is used for driving the locking block to be separated from the locking groove until the headrest moves to a preset position, and the traction groove pushes the locking block to be inserted into the locking groove to limit the headrest to move.

2. The telescopic backrest according to claim 1, wherein the moving block comprises a first mounting portion and a second mounting portion, a bending portion is formed between the first mounting portion and the second mounting portion, and a mounting hole is formed in the headrest;

when the moving block penetrates through the mounting hole until the bending part is located in the mounting hole, the first mounting part is used for being movably connected with the locking block, and the second mounting part is used for extending into the headrest.

3. The telescopic backrest according to claim 2, wherein the first mounting portion is provided with at least one first guide groove along a length direction thereof, the headrest is provided with a first stopper, and the first stopper is movably clamped with the first guide groove.

4. The telescopic backrest according to claim 2, wherein the headrest is provided with a pressing plate connected through a fixing member, the first mounting portion is provided with a first limit groove, and the pressing plate is used for being pressed in the first limit groove and located above the locking block, so that the locking block and the first mounting portion are prevented from being separated from the headrest.

5. The telescopic backrest according to claim 1, wherein the headrest is provided with a second guide groove along a width direction thereof, and the locking block is movably clamped in the second guide groove.

6. The telescopic backrest according to claim 5, wherein the second guide groove comprises a clamping groove and a second limiting groove, the locking block is provided with a second limiting block, the locking block is movably arranged in the clamping groove, and the second limiting block is movably arranged in the second limiting groove.

7. The telescopic backrest according to claim 2, wherein the locking block is further provided with a locking block, the traction groove and the first mounting portion are disposed at an oblique angle, and the locking block is movably locked in the traction groove.

8. The telescopic backrest according to claim 2, wherein an end of the second mounting portion remote from the first mounting portion is provided with an armrest recess, the headrest is provided with a through hole, and the armrest recess coincides with the through hole.

9. The telescopic backrest according to claim 2, wherein the second mounting portion is provided with a mounting seat, the mounting seat is connected with an elastic member, the headrest is provided with a mounting groove, and an end portion of the elastic member, which is far away from the mounting seat, is abutted in the mounting groove.

10. A child safety seat comprising a retractable backrest according to any one of claims 1 to 9.