A measuring device for a headrest guide sleeve

Abstract

The utility model discloses a kind of headrest guide sleeve measuring devices, belong to the technical field of automobile seat accessory detection, including base;Positioning mechanism, set on base, for fixed seat back, seat back has two headrest guide sleeves arranged along first direction;First measuring mechanism, located in one end of positioning mechanism, first measuring mechanism includes first lever, first lever is movably arranged on base along first direction, can be set in two headrest guide sleeves;Second measuring mechanism, located in the other end of positioning mechanism, second measuring mechanism includes second lever, second lever is movably arranged on base along first direction, can be set in two headrest guide sleeves;The movement axis of first lever located in two headrest guide sleeves and the movement axis of second lever located in two headrest guide sleeves at least part can coincide together, that is: positioning mechanism restricts first lever, second lever respectively along its movement axis movement.

Description

[0001] This utility model relates to the technical field of automotive seat component testing, and in particular to a measuring device for a headrest guide sleeve. Background Technology

[0002] The installation of headrest covers plays an important role in driving comfort, reducing pressure when the head comes into contact with the headrest, and ensuring that the headrest can effectively protect the neck from injury in the event of a collision.

[0003] The coaxiality of car seat headrest guide sleeves needs to be tested. In related technologies, the test is carried out by simulating the insertion of a test rod into the headrest guide sleeve. In reality, the relative torsional deformation between the two headrest guide sleeves is tiny. The simulated test can only detect the straightness of the through hole and is not very sensitive to the tiny relative torsional deformation between the two headrest guide sleeves, making it difficult to meet the high-standard measurement requirements. Summary of the Invention

[0004] To overcome the technical problem in existing technologies that are insensitive to minute relative torsional deformations between two headrest guide sleeves, making it difficult to achieve high-standard measurement requirements, this utility model provides a headrest guide sleeve measuring device, including a base; a positioning mechanism disposed on the base for fixing a seat back, wherein the seat back has a first headrest guide sleeve and a second headrest guide sleeve arranged along a first direction; a first measuring mechanism located at one end of the positioning mechanism, the first measuring mechanism including a first lever, the first lever being movably disposed on the base along the first direction and capable of sequentially passing through the first headrest guide sleeve and the second headrest guide sleeve; a second measuring mechanism located at the other end of the positioning mechanism, the second measuring mechanism including a second lever, the second lever being movably disposed on the base along the first direction and capable of sequentially passing through the second headrest guide sleeve and the first headrest guide sleeve; the axis of motion of the first lever located in the first headrest guide sleeve and the second headrest guide sleeve and the axis of motion of the second lever located in the second headrest guide sleeve and the first headrest guide sleeve are at least partially coincident.

[0005] Furthermore, the positioning mechanism includes a positioning pin, the inner cavity of which is provided with an inner pin along a first direction, the inner pin having a first side wall and a second side wall, the first side wall and the second side wall being disposed opposite each other in a second direction; the first side wall and the second side wall are movable relative to the axis of the positioning pin and have an unfolded state and a retracted state; the first side wall and the second side wall in the retracted state are separated from the first lever and the second lever so that the first headrest guide sleeve and the second headrest guide sleeve can be inserted into the first lever and the second lever; the first side wall and the second side wall in the unfolded state are engaged with the first lever and the second lever so as to fix the first headrest guide sleeve and the second headrest guide sleeve in the first lever and the second lever.

[0006] Furthermore, it also includes a drive mechanism, which includes a fixed seat having a through hole, the fixed seat being fixed on the base; a drive shaft, one end of which passes through the through hole and is connected to the second lever; and an operating end, the other end of which extends out of the through hole and is connected to the operating end, the operating end being used to drive the drive shaft to move along a first direction so that the second lever is connected to the second side wall.

[0007] Furthermore, the second measuring mechanism also includes a detection mechanism, which is provided between the driving mechanism and the positioning mechanism. The detection mechanism is fixed on the base and is used to detect the motion axes of the first lever and the second lever.

[0008] Furthermore, the second lever is detachably connected to the drive shaft, which passes through the inner cavity of the positioning pin and is connected to the inner pin. The rotation axes of the drive shaft, the second lever, and the positioning pin in the first direction are collinear.

[0009] Furthermore, the positioning mechanism also includes a positioning seat, which is fixed on the base, and the end of the positioning seat away from the base is engaged with the positioning pin.

[0010] Furthermore, the first measuring mechanism also includes a sliding plate movably mounted on a slide rail of the base; a mounting block, one end of which is fixed to the sliding plate, and the other end of the mounting block has a first limiting hole, through which the first lever is detachably connected to the positioning pin; the positioning pin and the first lever are arranged collinearly on the rotation axes in the first direction.

[0011] Furthermore, the first measuring mechanism also includes a first measuring part, which is fixedly connected to the sliding plate. The first measuring part includes a first detection shaft, which is always in contact with the first lever in the second direction, and is used to measure the position of the first lever in the second direction.

[0012] Furthermore, the second measuring mechanism also includes a second measuring part, which is fixedly mounted on the side of the base on which the fixed seat is installed; the second measuring part includes a second detection shaft, which is always in contact with the second lever in the second direction, and is used to measure the position of the second lever in the second direction.

[0013] Furthermore, the positioning mechanism also includes a positioning measuring unit, which is fixedly mounted on the base in the second direction; the positioning measuring unit includes a positioning detection shaft, which is always in contact with the positioning pin in the second direction, and is used to measure the position of the second lever in the second direction. Beneficial effects

[0014] The beneficial effects of adopting the technical solution of this utility model are as follows: 1) The positioning mechanism constrains the first lever to move along its axis of motion, and at the same time constrains the second lever to move along its axis of motion. The two axes of motion can intersect and coincide in the positioning mechanism.

[0015] If the first and second headrest guide sleeves are coaxial and aligned with the two axes of motion, the first and second levers can smoothly and almost simultaneously complete the entire insertion detection process without any collision or scraping. However, if there is any deviation between the first and second headrest guide sleeves—for example, if the second headrest guide sleeve is offset downwards or upwards relative to the first headrest guide sleeve—then after the first lever passes through the first headrest guide sleeve, the front end of the first lever will not be able to align with the entrance of the second headrest guide sleeve, causing jamming. The same applies to the second lever. Because of this deviation, the two axes of motion cannot coincide, which greatly amplifies the effect of the deviation, making the detection results unreliable and accurate, and requiring consistent measurement requirements.

[0016] 2) The positioning pin achieves a rigid connection with the first lever and the second lever without gap through the inner pin set in the inner cavity. When the first lever passes through the first headrest guide sleeve and the second headrest guide sleeve, and the second lever passes through the second headrest guide sleeve and the second headrest guide sleeve, the gap between them will be affected by the slight movement of the positioning pin when it is under force, which will affect the accuracy. The inner pin (expansion pin) can eliminate this gap and can also sensitively detect the slight relative torsional deformation between the two headrest guide sleeves.

[0017] When the first and second sidewalls are in the contracted state, they are separated from the first and second levers, and the positioning mechanism can install the first and second headrest guide sleeves.

[0018] When the first and second side walls are in the unfolded state, the positioning mechanism can fix the first and second headrest guide sleeves, which facilitates measurement and avoids poor measurement results due to external factors. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a measuring device for a headrest guide sleeve according to this utility model; Figure 2 This is a utility model Figure 1 Schematic diagram of the structure in the AA direction; Figure 3 This is a schematic diagram showing the connection of the drive shaft, first lever, inner pin, and second lever of the measuring device for a headrest guide sleeve according to this utility model.

[0021] Explanation of the reference numerals in the figure: 1. Base; 101. Guide rail; 2. Positioning mechanism; 21. Positioning pin; 211. Inner pin; 2111. First side wall; 2112. Second side wall; 22. Positioning seat; 23. Positioning measuring part; 231. Positioning detection shaft; 3. First measuring mechanism; 31. First lever; 32. Sliding plate; 33. Mounting block; 34. First measuring part; 341. First detection shaft; 4. Second measuring mechanism; 41. Second lever; 42. Detection mechanism; 43. Second measuring part; 431. Second detection shaft; 5. Drive mechanism; 51. Fixed seat; 52. Drive shaft; 53. Operating end. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] Please refer to Figures 1 to 3 A measuring device for a headrest guide sleeve includes a base 1; a positioning mechanism 2, disposed on the base 1, for fixing a seat back, wherein the seat back has a first headrest guide sleeve and a second headrest guide sleeve arranged along a first direction; a first measuring mechanism 3, located at one end of the positioning mechanism 2, the first measuring mechanism 3 including a first lever 31, the first lever 31 being movably disposed on the base 1 along the first direction and capable of sequentially passing through the first headrest guide sleeve and the second headrest guide sleeve; a second measuring mechanism 4, located at the other end of the positioning mechanism 2, the second measuring mechanism 4 including a second lever 41, the second lever 41 being movably disposed on the base 1 along the first direction and capable of sequentially passing through the second headrest guide sleeve and the first headrest guide sleeve; the axis of motion of the first lever 31 located in the first headrest guide sleeve and the axis of motion of the second lever 41 located in the second headrest guide sleeve and the first headrest guide sleeve are at least partially coincident.

[0024] In this technical solution, the positioning mechanism 2 is used to fix the first headrest guide sleeve and the second headrest guide sleeve on the seat back. The first headrest guide sleeve and the second headrest guide sleeve are arranged along a first direction. The first measuring mechanism 3 is located at one end of the positioning mechanism 2, corresponding to the first headrest guide sleeve, and the second measuring mechanism 4 is located at the other end of the positioning mechanism 2, corresponding to the second headrest guide sleeve. The first lever 31 of the first measuring mechanism 3 moves toward the positioning mechanism 2, first passing through the first headrest guide sleeve, and then continuing to move forward, passing through the second headrest guide sleeve. Almost simultaneously, the second lever 41 of the second measuring mechanism 4 also moves toward the positioning mechanism 2, first passing through the second headrest guide sleeve, and then continuing to move forward, passing through the first headrest guide sleeve.

[0025] The positioning mechanism 2 constrains the first lever 31 to move along its axis of motion, and at the same time constrains the second lever 41 to move along its axis of motion. The two axes of motion can intersect and coincide in the positioning mechanism 2.

[0026] If the first and second headrest guide sleeves are coaxial and aligned with the two axes of motion, the first lever 31 and the second lever 41 can smoothly and almost simultaneously complete the entire insertion detection process without any collision or scraping. However, if there is any deviation between the first and second headrest guide sleeves—for example, if the second headrest guide sleeve is offset downwards or upwards relative to the first headrest guide sleeve—then after the first lever 31 passes through the first headrest guide sleeve, the front end of the first lever 31 will not be able to align with the entrance of the second headrest guide sleeve, causing jamming. Similarly, the second lever 41 will also experience this issue. Because of the deviation, the two axes of motion cannot coincide, which greatly amplifies the effect of the deviation, making the detection results unreliable and accurate, and requiring consistent measurement requirements.

[0027] The positioning mechanism 2 includes a positioning pin 21. An inner pin 211 is provided within the inner cavity of the positioning pin 21 along a first direction. The inner pin 211 has a first side wall 2111 and a second side wall 2112, which are arranged opposite to each other in a second direction. The first side wall 2111 and the second side wall 2112 are movable relative to the axis of the positioning pin 21 and have an extended state and a retracted state. In the retracted state, the first side wall 2111 and the second side wall 2112 are separated from the first lever 31 and the second lever 41, so that the first headrest guide sleeve and the second headrest guide sleeve can be inserted into the first lever 31 and the second lever 41. In the extended state, the first side wall 2111 and the second side wall 2112 are engaged with the first lever 31 and the second lever 41, so that the first headrest guide sleeve and the second headrest guide sleeve are fixed in the first lever 31 and the second lever 41.

[0028] It is worth noting that the positioning pin 21 has a size of 14.2-14.4cm, suitable for conventional headrest guide sleeve length measurement. The inner cavity of the positioning pin 21 has an inner pin 211, with the central axis of the inner pin 211 0.2mm from the wall of the inner cavity. The first lever 31 passes through the first and second headrest guide sleeves, while the second lever 41 passes through the second and first headrest guide sleeves. This allows for fine-tuning of the positioning pin 21, ensuring that the first lever 31 and the second lever 41 smoothly enter both headrest guide sleeves simultaneously, achieving a coaxiality deviation of 0.2mm between the first and second headrest guide sleeves. The inner pin 211 is an expansion pin. The relevant technology of the expansion pin is described in patent authorization announcement number CN106662133B and will not be elaborated upon here.

[0029] The positioning pin 21 achieves a rigid connection with the first lever 31 and the second lever 41 without gap through the inner pin 211 set in the inner cavity. When the first lever 31 passes through the first headrest guide sleeve and the second headrest guide sleeve, and the second lever 41 passes through the second headrest guide sleeve and the second headrest guide sleeve, the gap between them will cause slight movement due to the positioning pin 21 under force, affecting the accuracy. The inner pin 211 (expansion pin) can eliminate this gap and can also sensitively detect the slight relative torsional deformation between the two headrest guide sleeves.

[0030] The first side wall 2111 can be connected to the first lever 31, and the second side wall 2112 can be connected to the second lever 41. The first side wall 2111 and the second side wall 2112 form two claws of an expansion pin. Due to its structure, the claws at both ends of the expansion pin have a retracted state and an extended state. When the first sidewall 2111 and the second sidewall 2112 are in the contracted state, they are separated from the first lever 31 and the second lever 41, and the positioning mechanism 2 can install the first headrest guide sleeve and the second headrest guide sleeve.

[0031] When the first side wall 2111 and the second side wall 2112 are in the unfolded state, the positioning mechanism 2 can fix the first headrest guide sleeve and the second headrest guide sleeve, which facilitates measurement and avoids poor measurement results due to external factors during measurement.

[0032] The connection between the second lever 41 and the positioning pin 21 is made by Figure 2 and Figure 3 As shown, it also includes a drive mechanism 5, which includes a fixed base 51 with a through hole, the fixed base 51 being fixed on the base 1; a drive shaft 52, one end of which passes through the through hole and is connected to the second lever 41; and an operating end 53, the other end of which extends out of the through hole and is connected to the operating end 53. The operating end 53 is used to drive the drive shaft 52 to move along a first direction so that the second lever 41 is connected to the second side wall 2112. It should be noted that the second lever 41 is detachably connected to the drive shaft 52, specifically by bolts. The drive shaft 52 passes through the inner cavity of the positioning pin 21 and is connected to the inner pin 211. The rotation axes of the drive shaft 52, the second lever 41, and the positioning pin 21 in the first direction are collinear, ensuring that when the drive shaft 51 drives the second lever 41 to move, the motion transmission path of the second lever 41 is directly concentric with the positioning pin 21, resulting in smooth transmission and reducing the offset of the motion axis position in the vibration path during motion transmission.

[0033] Depend on Figure 2As shown, the second measuring mechanism 4 also includes a detection mechanism 42. The detection mechanism 42 is provided between the driving mechanism 5 and the positioning mechanism 2. The detection mechanism 5 is fixed on the base 1 and is used to detect whether the motion axes of the first lever 31 and the second lever 41 coincide and how much they differ.

[0034] In this embodiment, the detection mechanism 42 is a go / no-go gauge, used to quickly and accurately check whether the first lever 31 and the second lever 41 can simultaneously pass through the first headrest guide sleeve and the second headrest guide sleeve. The relevant technology of the go / no-go gauge is described in detail in the patent authorization announcement number: CN105627877B, and will not be elaborated upon here.

[0035] In order to stably fix the positioning pin 21, by Figure 2 As shown, the positioning mechanism 2 also includes a positioning seat 22, which is fixed on the base 1. The end of the positioning seat 22 away from the base 1 is engaged with the positioning pin 21, resulting in a stable structure and a fixed position, thus avoiding deviation.

[0036] Depend on Figure 1 As shown, the first measuring mechanism 3 also includes a sliding plate 32, which is movably mounted on the slide rail 101 of the base 1; a mounting block 33, one end of which is fixed on the sliding plate 32, and the other end of the mounting block 33 has a first limiting hole, through which the first lever 31 passes and is detachably connected to the positioning pin 21; the positioning pin 21 and the first lever 31 are arranged collinearly on the rotation axis in the first direction, ensuring that the motion transmission path of the first lever 31 is directly concentric with the positioning pin 21, the transmission is smooth, and the position offset of the motion axis in the vibration channel is reduced during the motion transmission process.

[0037] Furthermore, the first measuring mechanism 3 also includes a first measuring part 34, which is fixedly connected to the sliding plate 32. The first measuring part 34 includes a first detection shaft 341, which is always in contact with the first lever 31 in the second direction and is used to measure the position of the first lever 31 in the second direction.

[0038] The second measuring mechanism 4 further includes a second measuring part 43, which is fixedly mounted on the side of the base 1 where the fixed seat 51 is installed; the second measuring part 43 includes a second detection shaft 431, which is always in contact with the second lever 41 in the second direction, and is used to measure the position of the second lever 41 in the second direction.

[0039] The positioning mechanism 2 further includes a positioning measuring part 23, which is fixedly mounted on the base 1 in the second direction; the positioning measuring part 23 includes a positioning detection shaft 231, which is always in contact with the positioning pin 21 in the second direction, and is used to measure the position of the second lever 41 in the second direction.

[0040] It should be noted that in this technical solution, the first measuring unit 34, the second measuring unit 43, and the positioning measuring unit 23 are all dial indicators. When the first lever 31 and the second lever 41 move within the first headrest guide sleeve and the second headrest guide sleeve, they can promptly display the linear distance between the first lever 31 and the second lever 41, amplifying minute changes between them. The relevant technology of dial indicators is described in detail in patent publication number CN103808217A, and will not be elaborated upon here.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A measuring device for a headrest guide sleeve, characterized in that, include: Base (1); Positioning mechanism (2) is provided on the base (1) for fixing the seat back, wherein the seat back has a first headrest guide sleeve and a second headrest guide sleeve arranged in a first direction; The first measuring mechanism (3) is located at one end of the positioning mechanism (2). The first measuring mechanism (3) includes a first lever (31). The first lever (31) is movably disposed on the base (1) along a first direction and can be sequentially inserted into the first headrest guide sleeve and the second headrest guide sleeve. The second measuring mechanism (4) is located at the other end of the positioning mechanism (2). The second measuring mechanism (4) includes a second lever (41). The second lever (41) is movably disposed on the base (1) along the first direction and can be sequentially inserted into the second headrest guide sleeve and the first headrest guide sleeve. The axis of motion of the first lever (31) located in the first headrest guide sleeve and the second headrest guide sleeve and the axis of motion of the second lever (41) located in the second headrest guide sleeve and the first headrest guide sleeve can at least partially coincide.

2. The measuring device for a headrest guide sleeve according to claim 1, characterized in that, The positioning mechanism (2) includes a positioning pin (21), and the inner cavity of the positioning pin (21) is provided with an inner pin (211) along a first direction. The inner pin (211) has a first side wall surface (2111) and a second side wall surface (2112), and the first side wall surface (2111) and the second side wall surface (2112) are arranged opposite to each other in a second direction. The first sidewall (2111) and the second sidewall (2112) are movable relative to the axis of the positioning pin (21) and have an extended state and a retracted state; The first sidewall (2111) and the second sidewall (2112) in the contracted state are separated from the first lever (31) and the second lever (41) so that the first headrest guide sleeve and the second headrest guide sleeve can be inserted into the first lever (31) and the second lever (41); The first sidewall (2111) and the second sidewall (2112) in the unfolded state are engaged with the first lever (31) and the second lever (41) to fix the first headrest guide sleeve and the second headrest guide sleeve in the first lever (31) and the second lever (41).

3. The measuring device for a headrest guide sleeve according to claim 2, characterized in that, It also includes a drive mechanism (5), which comprises: The fixing seat (51) has a through hole and is fixed on the base (1); A drive shaft (52) has one end passing through the through hole and connected to the second lever (41). The operating end (53) is connected to the other end of the drive shaft (52) extending out of the through hole. The operating end (53) is used to drive the drive shaft (52) to move along a first direction so that the second lever (41) is connected to the second side wall (2112).

4. The measuring device for a headrest guide sleeve according to claim 3, characterized in that, The second measuring mechanism (4) further includes a detection mechanism (42), which is provided between the driving mechanism (5) and the positioning mechanism (2). The detection mechanism (42) is fixed on the base (1) and is used to detect the motion axis of the first lever (31) and the second lever (41).

5. The measuring device for a headrest guide sleeve according to claim 3, characterized in that, The second lever (41) is detachably connected to the drive shaft (52), which passes through the inner cavity of the positioning pin (21) and is connected to the inner pin (211). The drive shaft (52), the second lever (41) and the positioning pin (21) are arranged collinearly on the rotation axis in the first direction.

6. The measuring device for a headrest guide sleeve according to claim 2, characterized in that, The positioning mechanism (2) further includes a positioning seat (22), which is fixed on the base (1), and the end of the positioning seat (22) away from the base (1) is engaged with the positioning pin (21).

7. The measuring device for a headrest guide sleeve according to claim 2, characterized in that, The first measuring mechanism (3) further includes: The sliding plate (32) is movably mounted on the slide rail (101) of the base (1); The mounting block (33) has one end fixed on the sliding plate (32) and the other end of the mounting block (33) has a limiting hole. The first lever (31) passes through the limiting hole and is detachably connected to the positioning pin (21). The positioning pin (21) and the first lever (31) are arranged collinearly on the rotation axis in the first direction.

8. The measuring device for a headrest guide sleeve according to claim 7, characterized in that, The first measuring mechanism (3) further includes a first measuring part (34), which is fixedly connected to the sliding plate (32). The first measuring part (34) includes a first detection shaft (341), which is always in contact with the first lever (31) in the second direction and is used to measure the position of the first lever (31) in the second direction.

9. The measuring device for a headrest guide sleeve according to claim 4, characterized in that, The second measuring mechanism (4) further includes a second measuring part (43), which is fixed on the side of the base (1) where the fixed seat (51) is installed; the second measuring part (43) includes a second detection shaft (431), which is in constant contact with the second lever (41) in the second direction, and is used to measure the position of the second lever (41) in the second direction.

10. The measuring device for a headrest guide sleeve according to claim 5, characterized in that, The positioning mechanism (2) further includes a positioning measuring part (23), which is fixedly mounted on the base (1) in the second direction; the positioning measuring part (23) includes a positioning detection shaft (231), which is always in contact with the positioning pin (21) in the second direction, and is used to measure the position of the second lever (41) in the second direction.

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