Seat headrest locking device

Abstract

The utility model relates to the field of automobile interiors, in particular to a seat headrest locking device which comprises a shell, a vertical rod hole is formed in the shell, a moving part is transversely connected into the shell in a sliding mode, an inclined face is arranged at one end of the moving part, and a clamping part used for being clamped into a locking groove of a metal rod is arranged at the other end of the moving part. A spring for enabling the moving part to slide towards the rod hole is arranged in the shell; a button is arranged at the top of the shell and fixedly provided with a pressing part, the bottom end of the pressing part is in sliding fit with the slope, the high end of the slope is away from the rod hole, and the low end of the slope is close to the rod hole. According to the scheme, the unlocking pressing direction of the locking button is changed, the locking button can be pressed manually conveniently, and operation convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive interiors, specifically to a seat headrest locking device. Background Technology

[0002] Existing car seat backrests have a headrest at the top, with a metal rod inserted vertically downwards into the seat back. The headrest height is adjusted by sliding the metal rod vertically across the top of the seat back. A headrest locking device at the top of the seat locks the metal rod, preventing the headrest from moving freely when height adjustment is not required. When the headrest locking device is unlocked, the metal rod is no longer locked, and the headrest height can be adjusted.

[0003] Chinese utility model patent with authorization announcement number CN220429953U discloses a quick-assembly and disassembly structure for a headrest with a wire harness. The patent involves a headrest locking device, specifically including a housing and a guide sleeve body. The guide sleeve body includes a tube and a cap located at the upper end of the tube. The cap is installed inside the housing. The cap has a through hole communicating with the tube, and a metal rod can pass through the cap and the tube of the guide sleeve body. The metal rod has several locking grooves. Both the housing and the cap are hollow structures with openings on the sides. A locking button is movably nested inside the cavity of the cap. The locking button has a button through-hole through which the metal rod can pass. The locking button also has a mounting hole that passes horizontally through the button through-hole. A retaining strip is inserted into the mounting hole. One end of the locking button has a button integrally formed outside the openings of the housing and the cap. The other end of the locking button has a connecting post integrally formed. A spring is sleeved on the connecting post. The two ends of the spring abut against the locking button and the inside of the cap, respectively. The metal rod with locking grooves on the headrest body passes through the cap, the locking button, and the tube in sequence. The retaining strip on the locking button can be engaged into the locking groove under the elastic force of the spring. The retaining strip cooperates with locking grooves of different heights to realize the height adjustment and locking of the headrest body.

[0004] However, in this existing patent, the locking button is located on the side of the metal rod. To unlock, the button must be pressed horizontally from the side of the metal rod. Because the locking button is thin and small, it is almost flush with the top of the seat back, making it difficult to reach the button with your fingers and causing inconvenience. Furthermore, in this patent, only the right side of the metal rod is locked, while the left side is unlocked, resulting in poor stability and security when the headrest is locked. Utility Model Content

[0005] The present invention aims to provide a seat headrest locking device to change the direction of button unlocking, making it easier for manual operation of the button and improving operational convenience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a seat headrest locking device, comprising a housing, the housing having a vertical rod hole, a movable part being slidably connected laterally inside the housing, one end of the movable part having an inclined surface, and the other end of the movable part having a locking part for locking into a locking groove of a metal rod;

[0007] The housing contains a spring for providing force to the moving part to slide in the direction of the rod hole;

[0008] The top of the housing is equipped with a vertically pressable button, and a pressing part is fixed on the button. The bottom end of the pressing part slides in conjunction with the inclined surface. The high end of the inclined surface is away from the rod hole, and the low end of the inclined surface is close to the rod hole.

[0009] The principle and advantages of this solution are as follows: The rod hole allows the metal rod of the headrest to be vertically inserted into the seat back. Once the metal rod is inserted into the rod hole, the moving part slides towards the rod hole under the action of a spring, and the locking part engages with the locking groove of the metal rod, thus locking the metal rod and preventing headrest height adjustment. When unlocking is required, pressing the button downwards moves the pressing part downwards, pressing it against the inclined surface. Since the high end of the inclined surface is away from the rod hole and the low end is close to the rod hole, the pressing part pushes the inclined surface, thereby pushing the moving part away from the rod hole. The locking part moves away from the locking groove and is no longer engaged, the metal rod is no longer locked, and it can move vertically, allowing headrest height adjustment.

[0010] Therefore, the solution of this application changes the pressing direction of the button from the horizontal pressing direction of the button in the prior art to the vertical pressing direction. When unlocking the metal rod, the button can be pressed down from the top of the seat back. Compared with pressing the button horizontally, the operation space is larger, and the finger can contact and press the button with the front, which is convenient for manual pressing of the button and improves the convenience of operation.

[0011] Preferably, as an improvement, there are two moving parts and two rod holes, with the two moving parts located between the two rod holes; the ends of the two moving parts with inclined surfaces are close to each other, and the ends of the two moving parts with locking parts are far apart; the pressing part of the button acts on both inclined surfaces simultaneously.

[0012] Therefore, the locking parts of the two moving parts respectively engage with the locking grooves of the two metal rods, allowing both metal rods to lock simultaneously. Compared to existing technologies where only one metal rod is locked, this significantly improves the stability and security of the metal rod locking. When unlocking is required, pressing the button downwards moves the pressing part downwards, which simultaneously acts on the two inclined surfaces, causing both moving parts to move simultaneously and move away from their respective rod holes. The locking parts on the two moving parts are no longer engaged in the locking grooves of their respective metal rods, thus achieving simultaneous unlocking of both metal rods. This solution requires only pressing one button to unlock both metal rods simultaneously, eliminating the need for separate unlocking operations for each metal rod, making the operation simple and convenient.

[0013] Preferably, as an improvement, the housing is internally fixedly connected with limiting parts, which are located on both sides of the moving member, and the moving member is laterally slidably connected between the limiting parts on both sides of the moving member.

[0014] Therefore, the limiting part plays a role in limiting and guiding the lateral movement of the moving part, and preventing the moving part from deviating.

[0015] Preferably, as an improvement, the spring is a compression spring, and a spring connecting part is fixedly connected inside the housing, with the compression spring connected between the spring connecting part and the moving part.

[0016] Therefore, the spring connecting part serves to connect to the end of the compression spring. Normally, the compression spring applies pressure to the moving part, and the locking part is stably locked into the locking groove. When unlocking, the moving part moves away from the rod hole, and the moving part compresses the compression spring, which stores force; when the button is released, the moving part moves in the opposite direction under the pressure of the compression spring and returns to its original position.

[0017] Preferably, as an improvement, the housing includes a top cover and a base, the base having a cavity, the top cover covering the cavity of the base, and a button located on the top cover; the movable part is located in the cavity.

[0018] Therefore, the chamber is used to house the moving parts, springs, and other structures. After the moving parts are installed in the chamber of the base, the top cover is closed on the base, and the moving parts and springs are not exposed.

[0019] Preferably, as an improvement, the top cover and the base are snap-fitted together.

[0020] Preferably, as an improvement, a limiting cover is detachably connected to the back of the top cover, the button is located between the limiting cover and the top cover, the limiting cover has space for the button to move vertically, the limiting cover has a through hole for the pressing part to pass through, and an elastic element connects the button and the limiting cover.

[0021] Thus, the button is mounted on the top cover, positioned between the top cover and the limiting cover, thereby securing the button to the top cover. A through hole allows the pressing part on the button to pass through and engage with the inclined surface. The elastic element serves to reset the button; when pressed, the button moves downwards; when released, the button moves upwards to reset under the action of the elastic element.

[0022] Preferably, as an improvement, the limiting cover and the top cover are detachably connected by screws or bolts.

[0023] Preferably, as an improvement, a limiting protrusion is fixedly connected to the button, and the limiting protrusion abuts against the back of the top cover. Thus, by providing the limiting protrusion, which abuts against the back of the top cover, the button is prevented from falling out from the front of the top cover.

[0024] Preferably, as an improvement, the base is provided with a locking part, which is located on the side of the rod hole away from the moving part. Attached Figure Description

[0025] Figure 1 A perspective view of the headrest locking device.

[0026] Figure 2 This is a three-dimensional view of the seat and its internal structure.

[0027] Figure 3 This is a 3D view of the top cover.

[0028] Figure 4 This is an exploded view of the top cover. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The reference numerals in the accompanying drawings include: base 1, top cover 2, button 3, metal rod 4, inclined surface 5, moving part 6, spring connecting part 7, snap-fit ​​end 8, limiting part 9, spring 10, snap hole 11, limiting cover 12, pressing part 13, screw 14, elastic element 15, through hole 16, screw hole 17.

[0031] The basic implementation examples are as follows: Figures 1-4 The image shows a headrest locking device, comprising a housing, a seat body 1, and a top cover 2. The seat body 1 has two rod holes for two metal rods 4 of the headrest to pass through. The bottom of the seat body 1 has a guide tube (which can be integrally fixed or snap-fitted in place), communicating with the rod holes. The metal rods 4 pass through the rod holes in the seat body 1 and are inserted downwards into the guide tube. In this embodiment, the top cover 2 covers the seat body 1 and also has two rod holes. The two rod holes on the top cover 2 are opposite to the two rod holes on the seat body 1, allowing the metal rods 4 to pass through both the rod holes on the top cover 2 and the rod holes on the seat body 1.

[0032] In this embodiment, the base 1 has a chamber, and a movable component 6 is laterally slidably connected in the chamber. In this embodiment, there are two movable components 6, which are located between two rod holes and are arranged opposite to each other. Of course, in other embodiments, only one movable component 6 may be provided.

[0033] In this embodiment, both movable parts 6 have inclined surfaces 5 at their close ends, and the other end of each movable part 6 is a snap-fit ​​end 8. The snap-fit ​​end 8 has a snap-fit ​​part for snapping into the locking groove of the metal rod 4, specifically a snap-fit ​​strip. In this embodiment, the two metal rods 4 have locking grooves on their opposite sides.

[0034] In this embodiment, the high ends of the two inclined planes 5 are close to each other, and the low ends of the two inclined planes 5 are far apart from each other. That is, the high end of the left inclined plane 5 is far away from the left rod hole, and the low end of the left inclined plane 5 is close to the left rod hole. The high end of the right inclined plane 5 is far away from the right rod hole, and the low end of the right inclined plane 5 is close to the right rod hole.

[0035] A spring 10 is provided inside the housing cavity to provide force for the sliding member 6 towards the rod hole. In this embodiment, the spring 10 is a compression spring. A spring connecting part 7 is integrally fixedly connected inside the housing. The spring connecting part 7 is close to the end of the moving member 6 away from the rod hole. The moving member 6 has a notch, and the compression spring is located at the notch. One end of the compression spring is connected to the spring connecting part 7, and the other end of the compression spring is connected to the side wall of the notch. Thus, when the metal rod 4 is inserted into the rod hole, the moving member 6 moves closer to the metal rod 4 under the elastic force of the compression spring, and the locking part of the moving member 6 is locked into the locking groove of the metal rod 4.

[0036] In this embodiment, both the spring connecting part 7 and the side wall of the notch are integrally provided with limiting posts. The two ends of the compression spring are sleeved on the limiting posts, thereby realizing the limiting of the compression spring. The compression spring is not easy to fall off the spring connecting part 7 and the moving part 6, and the compression spring is more stable between the moving part 6 and the spring connecting part 7.

[0037] Of course, in other embodiments, the spring 10 can also be a tension spring, in which case the tension spring applies a pulling force to the moving member 6, so that the moving member 6 has a force that moves closer to the metal rod 4.

[0038] In order to make the lateral movement of the moving part 6 smoother and to prevent the moving part 6 from deviating, in this embodiment, a limiting part 9 is integrally fixed inside the cavity of the seat body 1. The limiting part 9 is located on both sides of the moving part 6. In this embodiment, the limiting part 9 is a limiting block. Thus, by setting the limiting part 9, the limiting part 9 limits the moving part 6. The moving part 6 slides between the two limiting parts 9 and the moving part 6 will not deviate.

[0039] In addition, in some embodiments, the top of the limiting part 9 may extend above the moving part 6 to limit the upper side wall of the moving part 6, prevent the moving part 6 from moving upward and disengaging, and ensure that the moving part 6 slides at the bottom of the chamber.

[0040] Combination Figure 3 and Figure 4 As shown, in this embodiment, the upper cover 2 has a button hole in the middle, and a button 3 is installed in the button hole. A limiting cover 12 is provided on the back of the upper cover 2. A limiting protrusion is integrally formed on the edge of the button 3. Thus, the button 3 is inserted from the back of the upper cover 2 into the button hole. The limiting protrusion abuts against the back of the upper cover 2, preventing the button 3 from falling off from the front of the upper cover 2. Then, the limiting cover 12 is fixed to the back of the upper cover 2, with the button 3 located between the limiting cover 12 and the upper cover 2, achieving a fixed installation of the button 3 on the upper cover 2. In this embodiment, the specific connection method between the limiting cover 12 and the upper cover 2 is as follows: the back of the upper cover 2 has two screw holes 17, located on both sides of the button hole. Screw holes are also provided at both ends of the limiting cover 12. Thus, the screw 14 passes through both the screw holes of the limiting cover 12 and the screw holes 17 on the back of the upper cover 2, thereby achieving the fixation of the limiting cover 12 and the upper cover 2. Of course, in other embodiments, screws can be replaced with bolts for fixing.

[0041] In this embodiment, the limiting cover 12 is provided with a through hole 16, and the pressing part 13 on the back of the button 3 is specifically two pressing rods, which pass through the through hole 16 respectively. The limiting cover 12 is installed on the back of the upper cover 2, and there is a space between the limiting cover 12 and the upper cover 2 for the button 3 to move. In this embodiment, an elastic element 15 is provided between the limiting cover 12 and the button 3, and the elastic element 15 is specifically a compression spring.

[0042] Thus, after the upper cover 2, button 3 and limit cover 12 are assembled, the upper cover 2 is placed on the base 1, and the two pressing rods and the inclined surfaces 5 on the two moving parts 6 abut against each other, and the two pressing rods and the two inclined surfaces 5 slide together.

[0043] In this embodiment, the upper cover 2 is fitted onto the base 1, and the upper cover 2 and the base 1 are snapped together. Specifically, the base 1 has a snap-fit ​​part located on the side of the rod hole away from the moving part 6. The snap-fit ​​part is specifically a snap hole 11. Two snaps are integrally formed on the back of the upper cover 2, located at the ends of the upper cover 2. When the upper cover 2 is fitted onto the base 1, the snaps are inserted into the snap holes 11, and the snaps are engaged with the base 1, thus achieving the snap-fit ​​between the upper cover 2 and the base 1, making it difficult for the upper cover 2 and the base 1 to separate.

[0044] Specific usage is as follows: Combined Figure 2As shown, the metal rod 4 is inserted into the rod hole, and the locking parts on the two moving parts 6 respectively lock into the locking grooves of the two metal rods 4, thereby locking the two metal rods 4 and preventing the headrest from being height adjusted.

[0045] When unlocking is required, Figure 1 When button 3 is pressed down, it presses the elastic element 15, compressing it. Button 3 then moves the pressing part 13 downward, pressing the inclined surface 5. Since the high end of the inclined surface 5 is far from the rod hole and the low end is close to the rod hole, the pressing part 13 pushes the inclined surface 5, thereby pushing the moving part 6 to move away from the rod hole. At this time, the two moving parts 6 approach each other, and the locking parts on the two moving parts 6 no longer lock into the locking groove. The locking parts disengage from the locking groove, and the two metal rods 4 are no longer locked. The two metal rods 4 are unlocked at the same time, and the metal rods 4 can move vertically, thus allowing the headrest height to be adjusted.

[0046] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A seat headrest locking device, comprising a housing, the housing having a vertical rod hole, characterized in that: The housing is laterally slidably connected to a movable component. One end of the movable component is provided with an inclined surface, and the other end of the movable component is provided with a locking part for engaging with a locking groove in a metal rod. The housing is provided with a spring for providing force to the moving part to slide in the direction of the rod hole; The top of the housing is provided with a vertically pressable button, and a pressing part is fixedly provided on the button. The bottom end of the pressing part slides in conjunction with the inclined surface. The high end of the inclined surface is away from the rod hole, and the low end of the inclined surface is close to the rod hole.

2. The seat headrest locking device according to claim 1, characterized in that: The number of movable parts is two, the number of rod holes is two, and the two movable parts are located between the two rod holes; the ends of the two movable parts with inclined surfaces are close to each other, and the ends of the two movable parts with locking parts are far apart; the pressing part of the button acts on the two inclined surfaces simultaneously.

3. A seat headrest locking device according to claim 1 or 2, characterized in that: The housing is fixedly connected to a limiting part, which is located on both sides of the moving part. The moving part is laterally slidably connected between the limiting parts on both sides of the moving part.

4. A seat headrest locking device according to claim 1 or 2, characterized in that: The spring is a compression spring, and a spring connecting part is fixedly connected inside the housing. The compression spring is connected between the spring connecting part and the moving part.

5. A seat headrest locking device according to claim 1 or 2, characterized in that: The housing includes a top cover and a base, the base having a cavity, the top cover covering the cavity of the base, the button being located on the top cover; the movable component being located in the cavity.

6. A seat headrest locking device according to claim 5, characterized in that: The top cover and the base are snapped together.

7. A seat headrest locking device according to claim 5, characterized in that: A limiting cover is detachably connected to the back of the top cover. The button is located between the limiting cover and the top cover. The limiting cover has space for the button to move vertically. The limiting cover has a through hole for the pressing part to pass through. An elastic element connects the button and the limiting cover.

8. A seat headrest locking device according to claim 7, characterized in that: The limiting cover and the top cover are detachably connected by screws or bolts.

9. A seat headrest locking device according to claim 7, characterized in that: A limiting protrusion is fixedly connected to the button, and the limiting protrusion abuts against the back of the top cover.

10. A seat headrest locking device according to claim 5, characterized in that: The base is provided with a locking part, which is located on the side of the rod hole away from the moving part.

Images