Seat back support fixture

Abstract

The application discloses a seat back support testing fixture, which comprises a bottom plate, a supporting assembly and a testing assembly arranged at the top end of the bottom plate. The supporting assembly is configured to support the back support and fix the back support and the bottom plate relative to each other. The testing assembly comprises four positioning members, which are configured to abut the four back frame connecting portions of the back support respectively. The testing assembly further comprises a testing member transversely connected to the positioning members. The testing member is configured to pass through the mounting holes of the back frame connecting portions to test whether the shape and size of the back support meet the standards. The seat back support testing fixture provided by the application can test whether the shape and size of the back support meet the standards by the four positioning members abutting the four side back frame connecting portions and the testing member passing through the mounting holes. The position of the testing member on the four positioning members is consistent with the position of the mounting holes when the shape and size of the back support meet the standards, so that the staff can conveniently screen the back supports with nonstandard shape and size, and the quality of the products is ensured.

Description

Technical Field

[0001] This utility model relates to the field of inspection tool technology, specifically to a seat back support inspection tool. Background Technology

[0002] The backrest is a crucial component of a chair that supports the user's back. It typically includes a back frame covered with mesh fabric, a back support bracket to support the back frame, and a backrest support piece that connects the back support bracket to the seat base. During production, the various components of the backrest are manufactured separately to facilitate subsequent packaging and transportation.

[0003] Among them, as attached Figure 9 As shown, the back support 8 includes four back frame connecting parts 810 extending forward. These four connecting parts 810 are respectively used to connect to the four opposite corners of the back frame. Mounting holes 811 are formed along the left and right sides of the upper edge of each connecting part 810, and the connecting parts 810 are connected to the back frame via these mounting holes 811 and screws. The back support 8 also includes a lower plate-shaped sliding part 820. The back support 8 is slidably connected to the backrest support member in the vertical direction via the sliding part 820, thereby driving the back frame to rise and fall relative to the seat, providing a high degree of adjustment freedom.

[0004] Backrest supports are usually manufactured by injection molding. Injection molded parts are prone to thermal shrinkage when cooling, which can cause deformation and warping of the back frame connection after cooling. As a result, when assembling the backrest support, the mounting holes on the back frame connection cannot be aligned with the empty space on the back frame, and the backrest cannot be assembled smoothly, resulting in a defective product.

[0005] To ensure product yield, workers on the production line typically randomly inspect several back supports and use fixtures to check their shape and dimensions to ensure they meet standards. However, there is currently a lack of suitable fixtures for this type of back support on the market. Therefore, designing a fixture suitable for this back support has become a major problem that needs to be solved. Summary of the Invention

[0006] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a seat back support inspection tool. The tool uses four positioning members to fit the back frame connection parts on the four sides, and uses the detection members on the positioning members to pass through the mounting holes to detect whether the shape and size of the back support meets the standards. The position of the detection members on the four positioning members is consistent with the position of the mounting holes when the shape and size of the back support meets the standards, thereby facilitating the staff to screen back supports that do not meet the standards and ensuring product quality.

[0007] The effect of this utility model is achieved as follows: This application provides a seat back support inspection tool, including a base plate and a support assembly and a detection assembly disposed on the top of the base plate. The support assembly is configured to support the back support and fix the back support and the base plate relatively. The detection assembly includes four positioning members, which are respectively configured to abut against the four back frame connecting parts of the back support. The detection assembly also includes detection members that are laterally connected to the positioning members. The detection members are configured to pass through the mounting holes of the back frame connecting parts to detect whether the shape and size of the back support meet the standards.

[0008] Furthermore, the positioning component has detection holes cut out along its left and right sides. The detection component slides laterally to the positioning component through the detection holes, and the detection holes are aligned with the mounting holes on the back frame connection part. This makes the detection operation simpler.

[0009] Furthermore, the supporting component includes a first supporting platform and a limiting platform. The first supporting platform is configured to support the sliding part, and the limiting platform is located behind the first supporting platform and extends vertically beyond the first supporting platform. The limiting platform is configured to stop the rear end of the sliding part. This provides good stability and simplifies installation and positioning.

[0010] Furthermore, the top of the limiting platform bends forward to form a limiting part, which is configured to stop the top of the sliding part. This ensures that after the back support is installed into the fixture, the top of the sliding part is stopped by the limiting part, making it less likely to detach from the first support platform. This results in a stronger and more stable connection between the back support and the fixture. It also facilitates the installation and positioning of the back support, makes the test results more accurate, and ensures product quality.

[0011] Furthermore, a first positioning groove is recessed at the top of the first support platform, and the sliding part is engaged with the first support platform through the first positioning groove. This makes the sliding part and the first support platform relatively fixed in the left-right direction, resulting in higher connection strength and better stability.

[0012] Furthermore, the base plate has several horizontally extending grooves, and the positioning element includes a movable part protruding from its bottom end. The movable part is slidably connected to the base plate through the grooves, allowing the positioning element to slide left and right relative to the base plate. This makes the fixture applicable to various types of back supports, thus increasing its versatility.

[0013] Furthermore, the two adjacent positioning components are connected by a sliding adjustment mechanism, which includes a positive and negative threaded rod. A transverse rotating support hole is formed in the part of the base plate opposite the sliding groove. The positive and negative threaded rod passes through the rotating support hole and can rotate circumferentially. The positive and negative threaded rod has two symmetrical external threads. The left and right sides of the positive and negative threaded rod are threaded to the left and right movable parts respectively, and the movable parts and the base plate are relatively fixed in the circumferential direction. This allows the movable parts on both sides to move closer or further apart as the positive and negative threaded rod rotates circumferentially. By screwing the positive and negative threaded rods together and connecting the movable parts on both sides in series, not only is the connection strength high and the stability good, but the movable parts on both sides are also synchronously moved closer or further apart by the positive and negative threaded rods, making the adjustment of the positioning component spacing much simpler.

[0014] Furthermore, the base plate has a split structure, including a first base plate and a second base plate that are spliced ​​together front and rear, with two adjacent positioning components respectively set on the first and second base plates; the first base plate can slide back and forth relative to the second base plate. This allows the fixture to be used with various types of back supports, further improving its versatility.

[0015] Furthermore, the first base plate extends rearward to form a first connecting part, and the second base plate extends forward to form a second connecting part. The first connecting part and the second connecting part are connected vertically and vertically, and are connected by screws. The first connecting part has a hollowed-out adjustment groove extending in the front-back direction. The screw passes through the adjustment groove and is screwed into the second connecting part, so that the first connecting part can slide back and forth relative to the second connecting part with the help of the adjustment groove. The adjustment groove not only limits the front-back sliding range of the first base plate and improves stability, but also makes the front-back adjustment operation of the first base plate more convenient.

[0016] The seat back support inspection fixture provided in this application uses four positioning members to fit the four sides of the back frame connection. The fixture uses detection members on the positioning members to pass through the mounting holes to check whether the shape and size of the back support meet the standards. The positions of the detection members on the four positioning members are consistent with the positions of the mounting holes when the shape and size of the back support meet the standards. This ensures that when any part of the back support is bent or deformed, the detection members on the positioning members will not be able to align and pass through the mounting holes at least once. This makes it easier for staff to screen back supports that do not meet the shape and size standards and ensures product quality. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A three-dimensional structural schematic diagram of the seat back support inspection fixture provided in the embodiments of this application; Figure 2This is a schematic diagram of the connection structure between the testing piece and the inspection tool provided in the embodiments of this application; Figure 3 This is a schematic diagram of the connection structure between the back support and the inspection tool provided in an embodiment of this application; Figure 4 A cross-sectional structural diagram of the inspection fixture provided in the embodiments of this application; Figure 5 This is a schematic diagram illustrating the state changes of the test specimen during the testing process provided in the embodiments of this application; Figure 6 A three-dimensional structural diagram of the fixture when the positioning element provided in the embodiment of this application slides to its widest position; Figure 7 A three-dimensional structural diagram of the fixture when the positioning element provided in the embodiment of this application slides to its narrowest position; Figure 8 A schematic diagram of the connection structure between the first base plate and the second base plate provided in an embodiment of this application; Figure 9 This is a three-dimensional structural diagram of the back support provided in an embodiment of this application.

[0018] The reference numerals in the attached drawings are as follows: 1-base plate, 1a-first base plate, 1b-second base plate, 101-slide groove, 102-rotation support hole, 110-first connecting part, 111-adjusting groove, 120-second connecting part, 2-positioning component, 201-detection hole, 210-moving part, 3-detection component, 4-first support platform, 401-first positioning groove, 5-limiting platform, 510-limiting part, 6-second support platform, 601-second positioning groove, 7-positive and negative threaded rod, 710-knob, 8-back bracket, 810-back frame connecting part, 811-mounting hole, 820-sliding part. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0020] Please refer to the attached document. Figure 1-9 This application provides a seat back support inspection tool, including a base plate 1 and a support component and a detection component disposed on the top of the base plate 1. The support component is configured to support the back support 8 and fix the back support 8 and the base plate 1 relatively. The detection component includes four positioning members 2, which are respectively configured to abut against the four back frame connecting parts 810 of the back support 8. The detection component also includes a detection member 3 that is laterally connected to the positioning members 2. The detection member 3 is configured to pass through the mounting hole 811 of the back frame connecting part 810 to detect whether the shape and size of the back support 8 meet the standards.

[0021] In this embodiment, the inspection tool uses four positioning members 2 to fit against the four sides of the back frame connecting part 810, and uses the detection members 3 on the positioning members 2 to pass through the mounting holes 811 to detect whether the shape and size of the back bracket 8 meets the standard. The position of the detection members 3 on the four positioning members 2 is consistent with the position of the mounting holes 811 when the shape and size of the back bracket 8 meets the standard. This ensures that when any part of the back bracket 8 is bent or deformed, the detection members 3 on the positioning members 2 will not be able to align and pass through the mounting holes 811 at least once. This makes it easier for staff to screen back brackets 8 that do not meet the shape and size standards and ensures the quality of the product.

[0022] Please refer to the attached document. Figure 2 and attached Figure 5 In some embodiments of this application, the positioning member 2 has a detection hole 201 formed on the left and right sides, and the detection member 3 is laterally slidably connected to the positioning member 2 through the detection hole 201, and the detection hole 201 is aligned with the mounting hole 811 on the back frame connecting part 810.

[0023] In this embodiment, the detection element 3 is movably connected to the positioning element 2. Please refer to the attached document. Figure 5 When performing the test, simply insert the test piece 3 into the test hole 201 and observe whether the test piece 3 passes through the mounting hole 811 to determine whether it meets the standard. Furthermore, four positioning pieces 2 can share one test piece 3. After the staff has finished testing one of the back frame connecting parts 810, they can pull out the test piece 3 for the positioning piece 2 on the next side, making the test operation more convenient.

[0024] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the supporting component includes a first supporting platform 4 and a limiting platform 5. The first supporting platform 4 is configured to support the sliding part 820. The limiting platform 5 is disposed on the rear side of the first supporting platform 4 and extends beyond the first supporting platform 4 in the vertical direction. The limiting platform 5 is configured to block the rear end of the sliding part 820.

[0025] In this embodiment, when the back support 8 is installed into the fixture, the sliding part 820 can be placed on the first support platform 4 first, and then the back support 8 can be pushed from front to back until the rear end of the sliding part 820 abuts against the limiting platform 5, thus completing the installation and positioning operation of the back support 8. The stability is good and the installation and positioning operation is relatively simple.

[0026] Please refer to the attached document. Figure 2-4 In some embodiments of this application, the top of the limiting platform 5 is bent forward to form a limiting part 510, which is configured to stop the top of the sliding part 820. This ensures that after the back support 8 is inserted into the fixture, the top of the sliding part 820 is stopped by the limiting part 510, making it less likely to detach from the first support platform 4, thus increasing the connection strength and stability between the back support 8 and the fixture.

[0027] Please refer to the attached document. Figure 2-4 In some embodiments of this application, the vertical distance between the limiting part 510 and the first support platform 4 is close to the thickness of the sliding part 820. This allows the back bracket 8 to be stably placed on the inspection fixture when the sliding part 820 is engaged between the limiting part 510 and the first support platform 4, making the installation and positioning of the back bracket 8 more convenient. Furthermore, if the sliding part 820 bends or deforms, it will not be able to engage smoothly between the limiting part 510 and the first support platform 4, resulting in more accurate inspection results and ensuring product quality.

[0028] Please refer to the attached document. Figure 3 In some embodiments of this application, a first positioning groove 401 is recessed at the top of the first support platform 4, and the sliding part 820 is engaged with the first support platform 4 through the first positioning groove 401. This makes the sliding part 820 and the first support platform 4 relatively fixed in the left-right direction, resulting in higher connection strength and better stability.

[0029] Please refer to the appendix. Figure 3 The support assembly also includes a second support platform 6, which is configured to support the upper half of the back support 8. The second support platform 6 has a recessed second positioning groove 601 that fits the shape of the upper half of the back support 8, thereby further improving the connection strength between the inspection tool and the back support 8 and improving stability.

[0030] Please refer to the attached document. Figure 6-8 In some embodiments of this application, the base plate 1 is provided with a plurality of horizontally extending grooves 101, and the positioning member 2 includes a movable part 210 formed by a protrusion at the bottom end. The movable part 210 is slidably connected to the base plate 1 through the grooves 101, so that the positioning member 2 can slide left and right relative to the base plate 1.

[0031] In this embodiment, for different models of back supports 8, there are differences in the spacing between the left and right back frame connecting parts 810. If the position of the positioning member 2 on the base plate 1 is fixed, it may not be able to adapt to various models of back supports 8. Therefore, by opening a sliding groove 101 on the base plate 1, the positioning member 2 can be adjusted left and right along the sliding groove 101 by means of the movable part 210. The operator can adjust the position of the positioning member 2 according to the size of the back support 8 to be inspected, so that the inspection tool can be applied to various models of back supports 8, making it more versatile.

[0032] Please refer to the attached document. Figure 6-8In some embodiments of this application, two adjacent positioning members 2 are connected by a sliding adjustment mechanism. The sliding adjustment mechanism includes a positive and negative threaded rod 7. A transverse rotation support hole 102 is formed on the part of the base plate 1 facing the slide groove 101. The positive and negative threaded rod 7 passes through the rotation support hole 102 and can rotate around its own circumference. The positive and negative threaded rod 7 is provided with two symmetrical external threads. The left and right sides of the positive and negative threaded rod 7 are respectively threaded to the movable parts 210 on the left and right sides. The movable parts 210 and the base plate 1 are relatively fixed in the circumferential direction, so that when the positive and negative threaded rod 7 rotates around its own circumference, the movable parts 210 on the left and right sides are driven by the positive and negative threaded rod 7 to move closer or further away from each other.

[0033] In this embodiment, the movable parts 210 on both sides are connected and connected in series by the positive and negative threaded rods 7. This not only results in a high connection strength and good stability, but also allows the movable parts 210 on both sides to move closer or further away synchronously by the positive and negative threaded rods 7, making the spacing adjustment operation of the positioning member 2 more convenient.

[0034] The left and right ends of the positive and negative threaded rod 7 are detachably connected to knobs 710. Operators can rotate the positive and negative threaded rod 7 by turning the knobs 710, which in turn drives the positioning parts 2 on both sides to slide, making the operation more convenient.

[0035] The base plate 1 has inwardly recessed grooves 101 on both sides, allowing the threaded rods 7 and the movable part 210 to be inserted into the opening on one side of the grooves 101, making installation more convenient. Furthermore, the size of the movable part 210 fits snugly against the grooves 101, preventing it from rotating circumferentially within the grooves 101. That is, when the threaded rods 7 rotate, the movable part 210 cannot rotate with them and is forced to move along the length of the threaded rods 7.

[0036] Please refer to the attached document. Figure 6-8 In some embodiments of this application, the base plate 1 is a split structure, including a first base plate 1a and a second base plate 1b spliced ​​together, and two adjacent positioning members 2 are respectively disposed on the first base plate 1a and the second base plate 1b; the first base plate 1a can slide back and forth relative to the second base plate 1b.

[0037] In this embodiment, the spacing between the front and rear back frame connecting parts 810 will vary for different models of back brackets 8. Therefore, by setting the base plate 1 as two parts, a first base plate 1a and a second base plate 1b, when the first base plate 1a slides back and forth relative to the second base plate 1b, the positioning parts 2 on the front and rear sides can be moved to adjust the spacing, so that the fixture can be applied to various models of back brackets 8, further improving the versatility of the fixture.

[0038] Please refer to the attached document. Figure 6-8In some embodiments of this application, a first base plate 1a extends rearward to form a first connecting portion 110, and a second base plate 1b extends forward to form a second connecting portion 120. The first connecting portion 110 and the second connecting portion 120 are connected vertically and vertically by screws. An adjustment groove 111 extending in the front-back direction is provided on the first connecting portion 110. A screw passes through the adjustment groove 111 and is screwed onto the second connecting portion 120, so that the first connecting portion 110 can slide back and forth relative to the second connecting portion 120 by means of the adjustment groove 111. In this embodiment, the first connecting part 110 and the second connecting part 120 are connected by screws, which provides high connection strength and convenient assembly and disassembly. The adjusting groove 111 not only limits the forward and backward sliding range of the first base plate 1a, resulting in better stability, but also allows the first connecting part 110 to slide back and forth relative to the second connecting part 120 again when the first base plate 1a needs to be slidably adjusted; when the first base plate 1a needs to be fixed, the screws only need to be tightened, so that the first connecting part 110 can be pressed tightly against the second connecting part 120 again under the pressure of the screws, making the forward and backward adjustment operation of the first base plate 1a relatively simple.

[0039] Preferably, the first connecting part 110 is provided with two symmetrical adjustment grooves 111, which limit the first connecting part 110 to rotate relative to the second connecting part 120 by two sets of screws, thereby making the sliding adjustment operation of the first base plate 1a more stable and smooth.

[0040] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0041] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A seat back support inspection fixture, characterized in that, The device includes a base plate (1) and a support assembly and a detection assembly disposed on the top of the base plate (1). The support assembly is configured to support the back support (8) and fix the back support (8) and the base plate (1) relatively. The detection assembly includes four positioning members (2), which are configured to abut against the four back frame connecting parts (810) of the back support (8). The detection assembly also includes a detection member (3) that is laterally connected to the positioning members (2). The detection member (3) is configured to pass through the mounting hole (811) of the back frame connecting part (810) to detect whether the shape and size of the back support (8) meet the standards.

2. The seat back support inspection fixture according to claim 1, characterized in that, The positioning component (2) has a detection hole (201) formed by hollowing out the left and right sides. The detection component (3) is slidably connected to the positioning component (2) through the detection hole (201), and the detection hole (201) is aligned with the mounting hole (811) on the back frame connecting part (810).

3. The seat back support inspection fixture according to claim 1, characterized in that, The supporting component includes a first supporting platform (4) and a limiting platform (5). The first supporting platform (4) is configured to support the sliding part (820). The limiting platform (5) is located behind the first supporting platform (4) and extends beyond the first supporting platform (4) in the vertical direction. The limiting platform (5) is configured to stop the rear end of the sliding part (820).

4. The seat back support inspection fixture according to claim 3, characterized in that, The top of the limiting platform (5) is bent forward to form a limiting part (510), which is configured to stop at the top of the sliding part (820).

5. The seat back support inspection fixture according to claim 4, characterized in that, The vertical distance between the limiting part (510) and the first support platform (4) is close to the thickness of the sliding part (820).

6. The seat back support inspection fixture according to claim 3, characterized in that, The top of the first support platform (4) is recessed and provided with a first positioning groove (401), and the sliding part (820) is engaged with the first support platform (4) through the first positioning groove (401).

7. The seat back support inspection fixture according to claim 1, characterized in that, The base plate (1) has several horizontally extending grooves (101) and the positioning member (2) includes a movable part (210) protruding from the bottom end. The movable part (210) is slidably connected to the base plate (1) through the grooves (101), so that the positioning member (2) can slide left and right relative to the base plate (1).

8. The seat back support inspection fixture according to claim 7, characterized in that, The two adjacent positioning members (2) are connected by a sliding adjustment mechanism. The sliding adjustment mechanism includes a positive and negative threaded rod (7). A transverse rotation support hole (102) is formed on the part of the base plate (1) facing the slide groove (101). The positive and negative threaded rod (7) passes through the rotation support hole (102) and can rotate around its own circumference. The positive and negative threaded rod (7) is provided with two symmetrical external threads. The left and right sides of the positive and negative threaded rod (7) are respectively threaded to the movable parts (210) on the left and right sides. The movable parts (210) and the base plate (1) are relatively fixed in the circumferential direction, so that when the positive and negative threaded rod (7) rotates around its own circumference, the movable parts (210) on the left and right sides are driven by the positive and negative threaded rod (7) to move closer or further away from each other.

9. The seat back support inspection fixture according to claim 1, characterized in that, The base plate (1) is a split structure, including a first base plate (1a) and a second base plate (1b) spliced ​​together. Two adjacent positioning members (2) are respectively disposed on the first base plate (1a) and the second base plate (1b). The first base plate (1a) can slide back and forth relative to the second base plate (1b).

10. The seat back support inspection fixture according to claim 9, characterized in that, The first base plate (1a) extends rearward to form a first connecting part (110), and the second base plate (1b) extends forward to form a second connecting part (120). The first connecting part (110) and the second connecting part (120) are connected vertically and vertically, and are connected by screws. The first connecting part (110) is provided with an adjustment groove (111) extending in the front-back direction. The screw passes through the adjustment groove (111) and is screwed to the second connecting part (120), so that the first connecting part (110) can slide back and forth relative to the second connecting part (120) with the help of the adjustment groove (111).

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