Plastic headrest guide pipe

Abstract

The utility model relates to a plastic headrest guide pipe which comprises a guide pipe body, an unlocking button, a blocking piece and a compression spring, and the unlocking button comprises a pressing head and a sliding block which are integrally formed. A guide channel is arranged in the catheter body, a blind hole and a sliding through hole which are oppositely arranged are formed in the upper portion of the catheter body, an opening in the upper end of the guide channel is located between the blind hole and the sliding through hole, the sliding block sequentially transversely penetrates through the sliding through hole, the guide channel and the blind hole, the inner end of the sliding block is connected with the blind hole through the compression spring, and the pressing head is located on the outer side of the sliding through hole. A vertically-through guide hole is formed in the sliding block, the blocking piece is installed on the sliding block and covers part of the outline of the guide hole, and the diameter of the remaining outline of the guide hole is larger than or equal to the inner diameter of the guide channel. The inner wall of the upper portion of the guide channel is provided with two first protruding blocks protruding inwards, the two first protruding blocks are arranged side by side and located below the sliding block, the inner wall of the lower portion of the guide channel is provided with a second protruding block protruding inwards, and the second protruding block and the two first protruding blocks are oppositely arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a plastic headrest conduit. Background Art

[0002] In the manufacturing of car seats, there are many parts and components required for car seats, among which the headrest provides head support for passengers and ensures riding comfort.

[0003] Typically, the lower end of a car headrest is equipped with two parallel headrest rods, each mounted on the car seat via a corresponding headrest rod guide. However, current headrest rods are not straight but rather have a certain curvature. This makes it difficult to smoothly insert the headrest rod into the headrest rod guide. The insertion and extraction force between the curved headrest rod and the inner wall of the headrest rod guide is too high, affecting the consistency of assembly and disassembly between the headrest rod and the headrest rod guide. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a plastic headrest conduit, which can reduce the insertion and removal force of the headrest rod and improve the convenience of installing and disassembling the headrest rod.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] The lock member is a pair of locks, each of which is connected to the other end of the lock member, and the lock member is connected to the other end of the lock member by a screw thread, and the lock member is locked.

[0007] When the compression spring is in normal state, the baffle covers a part of the guide channel. When the headrest rod is to be inserted into the headrest rod guide tube, the button is pressed to compress the compression spring, and the slider drives the baffle to move in the direction of the blind hole, so that the guide channel is fully opened (not blocked by the baffle). Then the headrest rod is passed through the remaining contour of the guide hole and the guide channel from top to bottom. At this time, the two first protrusions on the upper inner wall of the guide channel press against the upper part of the headrest rod, and the second protrusion on the lower inner wall of the guide channel presses against the lower part of the headrest rod on the opposite side, so that the gap between the outer wall of the headrest rod and the inner wall of the guide channel becomes larger, reducing the gap between the outer wall of the headrest rod and the guide channel. The friction between the inner walls of the channel causes the curved headrest rod to slowly transition between the upper and lower cooperation of the first protrusion and the second protrusion. The headrest rod can gradually adjust its position during the insertion process, reducing the resistance during insertion and effectively reducing the insertion and extraction force between the headrest rod and the inner wall of the headrest rod guide tube, ensuring that the headrest rod is smoothly inserted into the headrest rod guide tube, and improving the convenience of installation and disassembly of the headrest rod; finally, release the pressing force of the button, compress the spring to return, and cause the slider to drive the baffle to move in the direction of the sliding through hole, thereby making the baffle engage with the notch on the headrest rod.

[0008] In a preferred embodiment, the second protrusion and the two first protrusions are reflected in a triangle on a plane perpendicular to the axial direction of the guide channel. The triangular design further reduces the contact area between the headrest rod and the inner wall of the guide tube, thereby further reducing friction and making the insertion and removal of the headrest rod smoother.

[0009] In a further preferred embodiment, the reflections of the second protrusion and the two first protrusions on a plane perpendicular to the axial direction of the guide channel are isosceles triangles.

[0010] In a further preferred embodiment, the reflections of the second protrusion and the two first protrusions on a plane perpendicular to the axial direction of the guide channel are equilateral triangles.

[0011] In a preferred embodiment, the protruding thickness of the first and second protruding blocks is 0.1 mm to 0.5 mm. Designing the protruding thickness of the first and second protruding blocks to be moderate effectively reduces the contact area between the headrest rod and the inner wall of the conduit while preventing the headrest rod from getting stuck during insertion.

[0012] In a preferred embodiment, the inner surfaces of the first and second protrusions are both curved. The curved surface design can more smoothly guide the headrest rod to gradually adapt to the shape of the catheter during insertion, reducing resistance and friction during insertion and improving the smoothness of installation.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The headrest rod of the utility model slowly transitions between the upper and lower cooperation of the first protrusion and the second protrusion, which can gradually adjust the position of the headrest rod during the insertion process, reduce the resistance during insertion, effectively reduce the insertion and extraction force between the headrest rod and the inner wall of the headrest rod guide tube, ensure that the headrest rod is smoothly inserted into the headrest rod guide tube, and improve the convenience of installing and removing the headrest rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the catheter body in the utility model (looking from above);

[0017] Figure 3 It is a top view of the catheter body in the utility model;

[0018] Figure 4 yes Figure 1 Cross-section of the middle AA;

[0019] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle pressure button. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-5 As shown, the plastic headrest duct in this embodiment includes a duct body 1, an unlocking button 2, a baffle 3 and a compression spring 4. The unlocking button 2 includes an integrally formed push head 21 and a slider 22. A guide channel 11 is provided in the duct body 1, which passes through the duct body 1 from top to bottom. A blind hole 12 and a sliding through hole 13 are provided on the upper part of the duct body 1. The upper end opening of the guide channel 11 is located between the blind hole 12 and the sliding through hole 13. The slider 22 sequentially crosses the sliding through hole 13, the guide channel 11, and the blind hole 12. The inner end of the slider 22 is connected to the blind hole 12 through the compression spring 4. The push head 21 is located in the sliding through hole 13, a guide hole 23 is provided on the slider 22, which passes through the guide channel 11 from top to bottom. The diameter of the guide hole 23 is larger than the inner diameter of the guide channel 11. The baffle 3 is installed on the slider 22 and covers part of the outline of the guide hole 23. The remaining outline diameter of the guide hole 23 is greater than or equal to the inner diameter of the guide channel 11; two first protrusions 14 protruding inward are provided on the upper inner wall of the guide channel 11, and the two first protrusions 14 are arranged side by side and below the slider 22. A second protrusion 15 protruding inward is provided on the lower inner wall of the guide channel 11, and the second protrusion 15 is arranged opposite to the two first protrusions 14.

[0022] When the compression spring 4 is in a normal state, the baffle 3 covers a portion of the guide channel 11. When the headrest rod 5 is to be inserted into the headrest rod guide tube, the button 21 is pressed to compress the compression spring 4, and the slider 22 drives the baffle 3 to move in the direction of the blind hole 12, so that the guide channel 11 is fully opened (not blocked by the baffle 3). Then the headrest rod 5 is passed through the remaining contour of the guide hole 23 and the guide channel 11 from top to bottom. At this time, the two first protrusions 14 on the upper inner wall of the guide channel 11 press against the upper part of the headrest rod 5, and the second protrusion 15 on the lower inner wall of the guide channel 11 presses against the lower part of the opposite side of the headrest rod 5, so that the gap between the outer wall of the headrest rod 5 and the inner wall of the guide channel 11 becomes larger, reducing the headrest. The friction between the outer wall of the rod 5 and the inner wall of the guide channel 11 causes the curved headrest rod 5 to slowly transition between the upper and lower cooperation of the first protrusion 14 and the second protrusion 15. The headrest rod 5 can gradually adjust its position during the insertion process, reducing the resistance during insertion, and effectively reducing the insertion and extraction force between the headrest rod 5 and the inner wall of the headrest rod guide tube, ensuring that the headrest rod is smoothly inserted into the headrest rod guide tube, and improving the convenience of installation and disassembly of the headrest rod; finally, release the pressing force of the button 21, compress the spring 4 to return to its position, and make the slider 22 drive the baffle 3 to move in the direction of the sliding through hole 13, so that the baffle 3 is snap-fitted with the notch on the headrest rod.

[0023] The second protrusion 15 and the two first protrusions 14 are reflected in an isosceles triangle on a plane perpendicular to the axial direction of the guide channel 11. The triangular design further reduces the contact area between the headrest rod and the inner wall of the guide tube, thereby further reducing friction and making the insertion and removal of the headrest rod smoother.

[0024] The protruding thickness of the first protrusion 14 and the protruding thickness of the second protrusion 15 are both 0.1mm-0.5mm. Designing the protruding thickness of the first protrusion 14 and the second protrusion 15 to be moderate can effectively reduce the contact area between the headrest rod and the inner wall of the catheter while preventing the headrest rod from getting stuck during insertion.

[0025] The inner surface of the first protrusion 14 and the inner surface of the second protrusion 15 are both curved surfaces. The curved surface design can more smoothly guide the headrest rod to gradually adapt to the shape of the catheter during insertion, reduce resistance and friction during insertion, and improve the smoothness of installation.

[0026] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different. Any equivalent or simple changes made based on the structure, features, and principles described in the concept of this utility model patent are included in the scope of protection of this utility model patent. Those skilled in the art of the technical field to which this utility model belongs may make various modifications or supplements to the specific embodiments described, or replace them with similar methods. As long as they do not deviate from the structure of this utility model or exceed the scope defined by this claim, they shall fall within the scope of protection of this utility model.

Claims

1. A plastic headrest duct, comprising a duct body, an unlocking button, a blocking piece, and a compression spring, wherein the unlocking button comprises an integrally formed push button and a slider; a guide channel extending vertically therethrough is provided in the duct body, a blind hole and a sliding through hole are provided on an upper portion of the duct body, the upper end opening of the guide channel is located between the blind hole and the sliding through hole, the slider sequentially passes through the sliding through hole, the guide channel, and the blind hole, the inner end of the slider being connected to the blind hole via a compression spring, the blocking piece being located outside the sliding through hole, the guide hole extending vertically therethrough is provided in the slider, the diameter of the guide hole being larger than the inner diameter of the guide channel, the blocking piece being mounted on the slider and covering a portion of the outline of the guide hole, the remaining outline diameter of the guide hole being greater than or equal to the inner diameter of the guide channel; and characterized in that: Two first protruding blocks protruding inward are provided on the upper inner wall of the guide channel. The two first protruding blocks are arranged side by side and below the slider. A second protruding block protruding inward is provided on the lower inner wall of the guide channel. The second protruding block is arranged opposite to the two first protruding blocks.

2. The plastic headrest conduit according to claim 1, characterized in that: The reflections of the second protrusion and the two first protrusions on a plane perpendicular to the axial direction of the guide channel are triangles.

3. The plastic headrest conduit according to claim 2, characterized in that: The reflections of the second protrusion and the two first protrusions on a plane perpendicular to the axial direction of the guide channel are isosceles triangles.

4. The plastic headrest conduit according to claim 3, characterized in that: The reflections of the second protrusion and the two first protrusions on a plane perpendicular to the axial direction of the guide channel are equilateral triangles.

5. The plastic headrest conduit according to claim 1, characterized in that: The protruding thickness of the first protrusion and the protruding thickness of the second protrusion are both 0.1 mm to 0.5 mm.

6. The plastic headrest conduit according to claim 1, characterized in that: The inner surface of the first convex block and the inner surface of the second convex block are both arc surfaces.

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