CN217145729U - Headrest height adjusting and limiting structure of safety seat - Google Patents

Abstract

The utility model discloses a headrest height adjusting and limiting structure of a safety seat, which comprises a seat back and a headrest arranged on the seat back in a lifting way, wherein the headrest is provided with a pulling plate, a locking pin is movably arranged on the pulling plate along the horizontal direction, and a transmission assembly is arranged between the pulling plate and the locking pin; the back of the chair is provided with a plurality of locating slots for the locking pins to insert, the back of the chair is provided with a limiting baffle corresponding to the locating slots, and the locking pins and the headrest are matched with the limiting baffle in an anti-falling way. The utility model has the advantages of it is following and effect: the new mechanical structure of this scheme utilization only needs the one-hand pulling arm-tie when adjusting the headrest height can, and it is comparatively simple and convenient to operate, and the motion of headrest is more steady when adjusting, is difficult for rocking.

Description

Headrest height adjusting and limiting structure of safety seat

Technical Field

The utility model relates to a safety seat technical field, in particular to headrest altitude mixture control limit structure of safety seat.

Background

Along with the improvement of living standard, the possession of family's car is constantly improving, selects car trip to become the ordinary mode of family's daily trip, and the car seat is equipped with a car safety seat that can supply each age bracket baby to take specially on, can effectively improve baby's safety by bus. At present, most baby car safety seat top all can be equipped with a headrest that can make lift activity regulation, its purpose is for the head dependence of the different babies of convenient each age bracket height, thereby both can provide the travelling comfort that baby's head leaned on, effectively play the effect of protection baby's neck again, and adjustment mechanism is usually by exposed regulating part, the gear subassembly of hiding the setting and the spacing isotructure that has a plurality of multi-gear tooth's socket constitute, mainly operate gear subassembly and a plurality of gear tooth's socket cooperation chucking or break away from through the regulating part during the use, and then the lift activity of locking or unblock headrest at the seat top, because the high regulation mode of headrest that each manufacture factory designed is different each other, the event has caused gear subassembly's structural design also diversified.

The prior Chinese patent application with the publication number of CN106114309A discloses a headrest height adjusting mechanism of a child safety seat for a vehicle, which comprises a seat back and a headrest arranged on the seat back; an adjusting pull rod is arranged on the headrest and comprises a pull rod end cap, a middle rod end and a rear rod end, a first through groove is formed in the headrest, a second through groove is formed in the chair back, a locking mechanism used for locking the position of the adjusting pull rod is installed on the rear rod section, the middle rod section of the adjusting pull rod sequentially penetrates through the first through groove and the second through groove, the adjusting pull rod is locked and fixed through the locking mechanism on the rear rod section, and the locking mechanism is a locking nut; be provided with first height adjustment mechanism on the headrest, first height adjustment mechanism is including setting up the square clamping groove inboard in first logical groove both sides, and first logical inslot is provided with a plurality of square clamping grooves along length direction interval, is provided with the location tooth with square clamping groove matched with on the interior terminal surface of pull rod end cap. In the adjusting process, the height of the headrest is adjusted in a mode of loosening the locking nut.

However, the above headrest height adjusting mechanism has the following disadvantages: in the adjustment process, because need loosen soon or screw lock nut, the operation process needs to adopt both hands to go on, not only has the more troublesome problem of operation when adjusting, easily rocks when removing the headrest moreover, and the location nature is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a headrest altitude mixture control limit structure of safety seat has the effect of easy and simple to handle, steady regulation.

The above technical purpose of the present invention can be achieved by the following technical solutions: a headrest height adjusting and limiting structure of a safety seat comprises a seat back and a headrest arranged on the seat back in a lifting mode, wherein the headrest is provided with a pull plate, a locking pin is movably arranged on the pull plate along the horizontal direction, and a transmission assembly is arranged between the pull plate and the locking pin; the back of the chair is provided with a plurality of locating slots for the locking pins to insert, the back of the chair is provided with a limiting baffle corresponding to the locating slots, and the locking pins and the headrest are matched with the limiting baffle in an anti-falling way.

By adopting the technical scheme, the locking pin is inserted into the positioning groove in the initial state; when the height of headrest is adjusted to needs, the arm-tie is carried to the one hand, makes it move along vertical direction, can order about the stop pin under drive assembly's drive and break away from the constant head tank along the horizontal direction motion, thereby can drive the relative back of the chair of headrest along the regulation of vertical direction up-and-down motion realization headrest height through the arm-tie this moment, in this accommodation process, because headrest and limit baffle anticreep cooperation for the headrest has higher stability at the in-process that slides from top to bottom, is difficult for rocking at will. When the headrest is adjusted to a proper height, the pulling plate is reset relative to the headrest, and the pulling plate can drive the locking pin to horizontally move through the transmission assembly to be inserted into the corresponding positioning groove again. When the stop pin is inserted into the positioning groove, the stop pin is matched with the limiting baffle in an anti-falling mode, and the pulling plate can be prevented from shaking forwards and backwards to a certain extent. Therefore, the pull plate can be pulled by only one hand when the height of the headrest is adjusted, the operation is simple and convenient, and the movement of the headrest is stable when the headrest is adjusted.

The utility model discloses a further set up to: the chair back is provided with a plurality of convex blocks which are sequentially arranged along the vertical direction, and positioning grooves are formed between adjacent convex blocks; a sliding channel is formed between the limiting baffle and the lug, a lug is formed on the side edge of the headrest, when the headrest is adjusted relative to the chair back, the lug slides in the sliding channel, and the limiting baffle is matched with the lug in a stopping way.

Through adopting above-mentioned technical scheme, when the relative back of the chair of headrest height adjustment and up-and-down motion, the lug begins to slide in the channel that slides all the time, and the front side of lug supports and leans on in limit baffle, and the rear side of lug supports and leans on in the lug, so, has higher stability when can making the relative channel that slides of headrest.

The utility model discloses a further set up to: the back of the chair is provided with a mounting groove adjacent to the bump, the limit baffle is fixed in the mounting groove through a screw, and the limit baffle extends towards the positioning groove and covers the positioning groove.

The utility model discloses a further set up to: the transmission assembly is including seting up the inclined hole in the lower part of arm-tie, and the stop pin correspondence is equipped with the guide post, and the horizontal spout that supplies the locking round pin to slide is seted up to guide post and inclined hole direction cooperation, headrest, and when the arm-tie moved along vertical direction, the inclined hole drove the stop pin along the horizontal direction motion with the guide post cooperation, made the stop pin insert or kept away from the constant head tank.

By adopting the technical scheme, when the pulling plate is lifted upwards, the inclined hole moves upwards relatively, the guide post which is in guide fit with the inclined hole moves along the inclined hole, and the guide post can drive the locking pin to move towards the center of the pulling plate along the horizontal direction so as to separate the locking pin from the positioning groove; when the pulling plate moves downwards, the inclined holes move downwards relatively, the guide posts matched with the inclined holes in a guide mode move along the inclined holes, and the guide posts can drive the locking pins to move outwards along the horizontal direction to the pulling plate, so that the locking pins are correspondingly inserted into the positioning grooves.

The utility model discloses a further set up to: the pulling plate and the headrest are movably arranged relatively, and an automatic reset assembly is arranged between the pulling plate and the headrest.

Through adopting above-mentioned technical scheme, after the headrest was adjusted to suitable height, loosen the back of drawing of carrying to the arm-tie, under the effect of automatic re-setting subassembly, can be so that the relative headrest automatic re-setting of arm-tie.

The utility model discloses a further set up to: the automatic reset assembly is arranged to be a reset spring, the pull plate is provided with a limiting column, the headrest is provided with a containing groove, one end of the reset spring is sleeved on the limiting column, the other end of the reset spring supports against the containing groove, and the reset spring orders the pull plate to reset relative to the headrest.

Through adopting above-mentioned technical scheme, when the arm-tie was upwards carried and is drawn, drive spacing post upward movement for reset spring is compressed, when the arm-tie loosed and no longer is carried and is drawn, reset spring promoted spacing post downward movement, can make arm-tie automatic re-setting.

The utility model discloses a further set up to: the headrest is vertically provided with a first limiting sliding groove, the pull plate is correspondingly provided with a limiting sliding column, and when the pull plate is pulled relative to the headrest, the limiting sliding column slides along the first limiting sliding groove.

Through adopting above-mentioned technical scheme, when the relative headrest up-and-down motion of arm-tie, spacing traveller slides from top to bottom along first spacing spout for the motion of the relative headrest of arm-tie keeps higher linearity and stability.

The utility model discloses a further set up to: the headrest is vertically provided with a second limiting sliding groove, the pulling plate is correspondingly provided with a fixing buckle, and the fixing buckle penetrates through the second limiting sliding groove and is fastened with the edge of the second limiting sliding groove.

Through adopting above-mentioned technical scheme, when the headrest height carries out the up-down regulation, on the one hand, fixed buckle slides along the spacing spout of second, and on the other hand, fixed buckle detains in the edge of the spacing spout of second, can prevent to a certain extent that headrest and arm-tie from keeping away from for the arm-tie can hug closely in the back of headrest all the time.

The utility model discloses a further set up to: the headrest has been seted up the mounting hole, and the mounting hole internal thread is installed spacing bolt, and the back of the chair corresponds and has been seted up vertical spout, and spacing bolt and vertical spout sliding fit.

Through adopting above-mentioned technical scheme, when the headrest carries out the altitude mixture control, the headrest slides along vertical direction, can drive spacing bolt simultaneously and slide along vertical spout, so, can ensure to keep higher linearity in the headrest accommodation process, difficult emergence offset.

The utility model discloses a further set up to: the top of the pulling plate is provided with a pulling ring which is higher than the top of the headrest.

Through adopting above-mentioned technical scheme, the user's accessible is held in the mode pulling arm-tie of pull ring, because the pull ring is higher than the top of headrest for it is more convenient to pull the arm-tie.

To sum up, the utility model discloses following beneficial effect has:

1. the mode that the locking pin is movably arranged on the pull plate is adopted, the locking pin and the headrest are matched with the limiting baffle in an anti-falling mode, when the height of the headrest is adjusted, only the pull plate needs to be driven by a single hand, the operation is simple and convenient, and the movement of the headrest is stable during adjustment;

2. the headrest has higher stability when sliding relative to the sliding channel by adopting the mode that the lugs formed on the side edge of the headrest are matched with the sliding channel in a sliding way;

3. the adoption is seted up first spacing spout, the spacing spout of second at the headrest, and spacing traveller, fixed buckle correspond the cooperation of sliding for the relative motion of headrest of arm-tie keeps higher linearity and stability, and fixed buckle makes the arm-tie can hug closely in the back of headrest all the time.

Drawings

Fig. 1 is a schematic diagram of the overall structural relationship of the embodiment.

Fig. 2 is a schematic structural relationship diagram of the embodiment without the headrest.

Fig. 3 is an exploded view of the embodiment.

Fig. 4 is a top view of the embodiment.

Fig. 5 is a sectional view of section a-a in fig. 4.

Fig. 6 is a schematic structural relationship diagram of the back of the headrest in the embodiment.

In the figure: 1. a chair back; 11. a bump; 12. positioning a groove; 13. mounting grooves; 14. a limit baffle; 15. a vertical chute; 2. a headrest; 21. a lug; 22. accommodating grooves; 23. a first limiting chute; 24. a second limiting chute; 25. mounting holes; 26. a limit bolt; 27. a horizontal chute; 3. pulling a plate; 31. a pull ring; 32. an inclined hole; 33. a limiting column; 34. a limiting sliding column; 35. fixing a buckle; 4. a locking pin; 41. a guide post; 5. a slipping channel; 6. a return spring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model provides a headrest altitude mixture control limit structure of safety seat, as shown in fig. 1 and 2, including back of the chair 1, go up and down to locate headrest 2 of back of the chair 1, headrest 2's back movable mounting has arm-tie 3, and the top of arm-tie 3 is provided with pull ring 31, and pull ring 31 is higher than headrest 2's top, and user's accessible is held in pull ring 31's mode pulling arm-tie 3, because pull ring 31 is higher than headrest 2's top for it is more convenient to stimulate arm-tie 3. Two locking pins 4 are movably arranged at the lower part of the pulling plate 3 along the horizontal direction, the two locking pins 4 are symmetrically arranged, and a transmission assembly is arranged between the pulling plate 3 and the locking pins 4. The transmission assembly comprises two inclined holes 32 arranged at the lower part of the pulling plate 3, the inclined holes 32 are arranged in an inclined manner of 45 degrees, and the two inclined holes 32 are obliquely expanded outwards from bottom to top.

As shown in fig. 3 and 6, the inner ends of the locking pins 4 are correspondingly provided with guide posts 41, the guide posts 41 are in guiding fit with the inclined holes 32, the back surface of the headrest 2 is provided with horizontal sliding grooves 27 for the two locking pins 4 to horizontally slide, when the pulling plate 3 moves upwards along the vertical direction, the inclined holes 32 are in fit with the guide posts 41 to drive the locking pins 4 to move outwards along the horizontal direction, the two locking pins 4 are far away from each other, otherwise, the locking pins 4 can move towards the middle part of the pulling plate 3 along the horizontal direction, and the two locking pins 4 are close to each other.

As shown in fig. 2-5, a plurality of bumps 11 are arranged at two sides of the front side of the chair back 1, the bumps 11 are sequentially arranged along the vertical direction, and positioning grooves 12 for the insertion of the locking pins 4 are formed between the adjacent bumps 11; the back of the chair 1 is seted up adjacent to the mounting groove 13 of lug 11, has limit baffle 14 through screw fixed mounting in the mounting groove 13, and limit baffle 14 extends and covers in constant head tank 12 to constant head tank 12, is formed with vertical slide channel 5 between limit baffle 14 and lug 11. The side of the headrest 2 is provided with a lug 21, and the locking pin 4 and the lug 21 are matched with the limit baffle 14 in a falling-off prevention way.

As shown in fig. 3 and 6, an automatic reset assembly is arranged between the pulling plate 3 and the headrest 2, the automatic reset assembly is set to be two vertically arranged reset springs 6, the pulling plate 3 is provided with two limiting columns 33, the back face of the headrest 2 is provided with an accommodating groove 22, the limiting columns 33 extend into the accommodating groove 22, the lower end of each reset spring 6 is sleeved on the corresponding limiting column 33, the upper end of each reset spring 6 supports against the top wall of the corresponding accommodating groove 22, and the reset springs 6 drive the pulling plate 3 to reset relative to the headrest 2. When the pulling plate 3 is lifted upwards, the limiting column 33 is driven to move upwards, so that the reset spring 6 is compressed, and when the pulling plate 3 is loosened and is not lifted any more, the reset spring 6 pushes the limiting column 33 to move downwards, so that the pulling plate 3 can be automatically reset.

As shown in fig. 1 and 3, the headrest 2 is vertically provided with two first limiting sliding grooves 23 respectively located at the upper part and the lower part of the headrest 2 and located on the same straight line, the pull plate 3 is correspondingly provided with a limiting sliding column 34, and a bolt can be installed in the limiting sliding column 34, so that the nut of the bolt is in anti-falling fit with the headrest 2, when the pull plate 3 moves up and down relative to the headrest 2, the limiting sliding column 34 slides up and down along the first limiting sliding grooves 23, and the movement of the pull plate 3 relative to the headrest 2 keeps high linearity and stability. The headrest 2 is vertically provided with a second limiting sliding groove 24, the pull plate 3 is correspondingly provided with two fixed buckles 35, and the fixed buckles 35 penetrate through the second limiting sliding groove 24 and are buckled with the edge of the second limiting sliding groove 24. When the headrest 2 highly carries out the up-down regulation, on the one hand, fixed buckle 35 slides along the spacing spout 24 of second, and on the other hand, fixed buckle 35 detains in the edge of the spacing spout 24 of second, can prevent to a certain extent that headrest 2 and arm-tie 3 from keeping away from for arm-tie 3 can hug closely in the back of headrest 2 all the time.

As shown in fig. 3, the headrest 2 is provided with a mounting hole 25, a limiting bolt 26 is installed in the mounting hole 25 through internal threads, the seat back 1 is correspondingly provided with a long-strip-shaped vertical sliding groove 15, and the limiting bolt 26 is in sliding fit with the vertical sliding groove 15. When the height of the headrest 2 is adjusted, the headrest 2 slides along the vertical direction, and meanwhile, the limiting bolt 26 can be driven to slide along the vertical sliding groove 15, so that the headrest 2 can be ensured to keep high linearity in the adjusting process, and the position deviation is not easy to occur.

The utility model discloses a basic operating principle does: in an initial state, the two locking pins 4 are respectively inserted into the corresponding positioning grooves 12, and the headrest 2 is in a locking and positioning state; when the height of the headrest 2 needs to be adjusted, the pull plate 3 is lifted by a single hand to move upwards along the vertical direction, the inclined hole 32 moves upwards relatively, the guide column 41 which is in guide fit with the inclined hole 32 moves towards the center of the pull plate 3 along the inclined hole 32, and the guide column 41 can drive the locking pin 4 to move along the center of the pull plate 3 along the horizontal direction, so that the locking pin 4 is separated from the positioning groove 12; can drive the relative back of the chair 1 of the head rest 2 through arm-tie 3 this moment along the regulation of vertical direction up-and-down motion realization head rest 2 height, at this accommodation process, lug 21 slides in the passageway 5 that slides all the time, and the front side of lug 21 supports and leans on in limit baffle 14, and the rear side of lug 21 supports and leans on in lug 11, so, can have higher stability when making relative passageway 5 that slides of head rest 2, be difficult for rocking at will. When the headrest 2 is adjusted to a proper height, after the pulling of the pulling plate 3 is released, the pulling plate 3 can automatically move downwards relative to the headrest 2 under the action of the automatic resetting component to reset, and the pulling plate 3 can drive the locking pin 4 to horizontally move through the transmission component and then be inserted into the corresponding positioning groove 12 again. When the locking pin 4 is inserted into the positioning groove 12, the locking pin 4 is in anti-disengagement fit with the limit baffle 14, and the pulling plate 3 can be prevented from shaking back and forth to a certain extent. Therefore, the pull plate 3 only needs to be beaten by a single hand when the height of the headrest 2 is adjusted, the operation is simple and convenient, and the movement of the headrest 2 is stable when the adjustment is carried out.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims (10)

1. A headrest height adjusting and limiting structure of a safety seat comprises a seat back (1) and a headrest (2) arranged on the seat back (1) in a lifting mode, wherein a pull plate (3) is mounted on the headrest (2), a locking pin (4) is movably arranged on the pull plate (3) along the horizontal direction, and a transmission assembly is arranged between the pull plate (3) and the locking pin (4); a plurality of confessions have been seted up in back of the chair (1) locking pin (4) male constant head tank (12), its characterized in that: the chair back (1) is provided with a limit baffle (14) corresponding to the positioning groove (12), and the locking pin (4) and the headrest (2) are matched with the limit baffle (14) in a falling-off prevention mode.

2. The headrest height adjustment limiting structure of the safety seat according to claim 1, wherein: the chair back (1) is provided with a plurality of convex blocks (11), the convex blocks (11) are sequentially arranged along the vertical direction, and the positioning grooves (12) are formed between the adjacent convex blocks (11); limit baffle (14) with be formed with between lug (11) channel of sliding (5), the side of headrest (2) is formed with lug (21), works as headrest (2) are relative when back of the chair (1) is adjusted, lug (21) in slide in channel of sliding (5), just limit baffle (14) with lug (21) backstop cooperation.

3. The headrest height adjustment limit structure of a safety seat according to claim 2, wherein: the back of the chair (1) seted up adjacent to mounting groove (13) of lug (11), limit baffle (14) are fixed in through the screw in mounting groove (13), just limit baffle (14) to constant head tank (12) extend and cover in constant head tank (12).

4. The headrest height adjustment limit structure of a safety seat according to claim 1, wherein: the transmission assembly is including seting up in inclined hole (32) of the lower part of arm-tie (3), stop pin (4) correspondence is equipped with guide post (41), guide post (41) with inclined hole (32) direction cooperation, the confession has been seted up in headrest (2) horizontal spout (27) that stop pin (4) slided work as when arm-tie (3) are followed vertical direction and are moved, inclined hole (32) and guide post (41) cooperation drive stop pin (4) are followed the horizontal direction and are moved, make stop pin (4) insert or keep away from constant head tank (12).

5. The headrest height adjustment limiting structure of the safety seat as claimed in claim 4, wherein: the pull plate (3) and the headrest (2) are movably arranged relatively, and an automatic reset assembly is arranged between the pull plate (3) and the headrest (2).

6. The headrest height adjustment limiting structure of the safety seat as claimed in claim 5, wherein: the automatic reset assembly is arranged to be a reset spring (6), the pulling plate (3) is provided with a limiting column (33), the headrest (2) is provided with an accommodating groove (22), one end of the reset spring (6) is sleeved on the limiting column (33), the other end of the reset spring (6) is supported on the accommodating groove (22), and the reset spring (6) drives the pulling plate (3) to be opposite to the headrest (2) to reset.

7. The headrest height adjustment limiting structure of the safety seat as claimed in claim 5, wherein: first spacing spout (23) have vertically been seted up in headrest (2), arm-tie (3) correspond and are equipped with spacing traveller (34), work as when relative headrest (2) pulling of arm-tie (3), spacing traveller (34) are followed first spacing spout (23) slide.

8. The headrest height adjustment limiting structure of the safety seat as claimed in claim 5, wherein: the headrest (2) is vertically provided with a second limiting sliding groove (24), the pull plate (3) is correspondingly provided with a fixed buckle (35), and the fixed buckle (35) penetrates through the second limiting sliding groove (24) and is buckled with the edge of the second limiting sliding groove (24).

9. The headrest height adjustment limit structure of a safety seat according to claim 1, wherein: mounting hole (25) have been seted up in headrest (2), spacing bolt (26) are installed to mounting hole (25) internal thread, vertical spout (15) have been seted up in back of the chair (1) correspondence, spacing bolt (26) with vertical spout (15) cooperation of sliding.

10. The headrest height adjustment limit structure of a safety seat according to claim 1, wherein: the top of the pull plate (3) is provided with a pull ring (31), and the pull ring (31) is higher than the top of the headrest (2).

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