Front and rear cover buckling device for seat backrest cover

Abstract

The utility model discloses a front cover and rear cover buckling device for a seat backrest cover, which comprises a positioning mechanism and a fixing mechanism, the positioning mechanism comprises a lower die holder and an upper die holder, the upper surface of the lower die holder is provided with a first cavity for placing a rear cover, the upper die holder is arranged right above the lower die holder and can move up and down, and the lower die holder is provided with a second cavity for placing the rear cover. A second cavity for placing a front cover is formed in the lower surface of the upper die holder; the fixing mechanism is arranged on the upper die base and comprises a fixing piece and a driving piece. The buckling device has the beneficial effects that the buckling device is suitable for buckling the backrest front cover and the backrest rear cover of the structure, so that the problems that the buckling is not in place and repeated buckling is needed when two persons respectively hold the front cover or the rear cover to manually buckle the front cover or the rear cover are solved; by the adoption of the buckling device, buckling of the front cover and the rear cover can be achieved at a time, and the machining efficiency of the backrest cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft seat processing, in particular to a front and rear cover buckling device for a seat back cover. Background Art

[0002] The aircraft seat back cover is one of the important components of the aircraft seat. The front back cover and the rear back cover are used together to enclose a closed cavity to accommodate the backrest. Figure 1 As shown, the backrest cover 100 includes a front cover 110, a rear cover 120 and a plurality of mounting pieces 130. A through slot 111 is provided on the back plate of the front cover 110. The rear cover 120 and the front cover 110 are used to form a cavity. A mounting hole 131 is provided on each of the mounting pieces 130. Each of the mounting pieces 130 is respectively fixed on the outer side walls of the corresponding front cover 110 and the rear cover 120. When the front cover 110 and the rear cover 120 are buckled together, the mounting holes 131 on the mounting pieces 130 on the front cover 110 and the mounting holes 131 on the mounting pieces 130 on the rear cover 120 are arranged one by one.

[0003] After the front cover and the back cover of the aircraft seat backrest are made by the hot pressing process, the front cover and the back cover are buckled and connected by screws to form a whole. The existing buckling device (such as the buckling device disclosed in the application No. 201921032035.8) is not suitable for buckling the front cover and the back cover of the backrest of this structure. If the front cover and the back cover are manually buckled, two people are required to hold the front cover or the back cover respectively, which is easy to buckle in place and needs to be buckled repeatedly, resulting in low processing efficiency of the backrest cover. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and propose a front and rear cover buckling device for a seat back cover, so as to solve the technical problem that the buckling device in the prior art is not suitable for buckling the front cover and the rear cover of the backrest of the present structure, and the front cover and the rear cover are manually buckled, which is prone to the situation of not buckling in place, and repeated buckling will reduce the processing efficiency of the backrest cover.

[0005] In order to achieve the above technical purpose, the technical solution of the utility model provides a front and rear cover buckling device for a seat back cover, comprising:

[0006] The positioning mechanism comprises a lower die seat and an upper die seat, wherein the upper surface of the lower die seat is provided with a first cavity for placing the rear cover, the upper die seat is arranged directly above the lower die seat and can move up and down, and the lower surface of the upper die seat is provided with a second cavity for placing the front cover;

[0007] The fixing mechanism is arranged on the upper die base, and comprises a fixing part and a driving part. The fixing part is rotatably mounted on the upper die base, and the driving part is connected to one end of the fixing part and is used to drive the other end of the fixing part to tighten or loosen the front cover.

[0008] Furthermore, the positioning mechanism also includes at least two guide rods, each of which is vertically arranged, and the lower end of each of the guide rods is fixed on the lower mold base, and the upper mold base is slidably sleeved on each of the guide rods.

[0009] Furthermore, the positioning mechanism also includes at least two positioning rods, the upper end of each of the positioning rods is hinged to the upper die base, and the lower end of each of the positioning rods is used to abut against the upper surface of the lower die base.

[0010] Furthermore, the positioning mechanism also includes at least two positioning seats, each of which is fixed on the outer side wall of the lower mold base and corresponds to each of the positioning rods one by one. The upper surface of the positioning seat is provided with a positioning groove for the lower end of the positioning rod to be inserted into.

[0011] Furthermore, a receiving groove is provided on the upper mold base, and the receiving groove is communicated with the second cavity. When the front cover is placed in the second cavity, the through groove on the front cover corresponds to the receiving groove.

[0012] Furthermore, there are several fixing parts, one end of each of the fixing parts is arranged in the receiving groove, the other end of each of the fixing parts extends into the second cavity, and the driving part is connected to one end of each of the fixing parts to drive the other end of each of the fixing parts to tighten or loosen the inner side wall of the back plate of the front cover.

[0013] Furthermore, the fixing member includes a mounting rod, a clamping rod and a connecting rod, the mounting rod is arranged in the receiving groove, one end of the mounting rod is rotatably mounted on the upper mold base via a rotating shaft, one end of the clamping rod is fixedly connected to the middle position of the mounting rod, the other end of the clamping rod extends into the second cavity, and is used to clamp or loosen the inner side wall of the back plate of the front cover, the connecting rod is arranged in the receiving groove, one end of the connecting rod is hinged to the other end of the mounting rod, and the driving member is connected to the other end of each of the connecting rods, and is used to drive each of the connecting rods to move in the horizontal direction.

[0014] Furthermore, a slide groove and a screw hole are provided on the upper mold base. The slide groove has a first end with an opening and a second end with a sealing arrangement, and is connected to the receiving groove via the first end. One end of the screw hole is connected to the second end of the slide groove.

[0015] Furthermore, the driving member includes a moving seat, a docking column and a screw rod, one end of the moving seat is slidably set in the slide groove, the other end of the connecting rod is hinged to the other end of the moving seat, and a docking cavity with a columnar structure extending along the length direction of the slide groove is opened in the moving seat, the docking column is rotatably set in the docking cavity, one end of the screw rod is set on the outside of the upper mold seat, the other end of the screw rod passes through the screw hole, and rotates through the moving seat to extend into the docking cavity to be fixedly connected to the docking column, and the screw rod is screwed to the screw hole.

[0016] Furthermore, the diameter of the docking column is greater than the diameter of the screw rod.

[0017] Compared with the prior art, the beneficial effects of the utility model include: when in use, the rear cover is placed in the first cavity, and the front cover is placed in the second cavity. By operating the driving member, the driving member can drive the other end of the fixing member to press against the front cover, so that the front cover can be fixed on the upper mold base, and then the upper mold base is moved downward so that the upper mold base and the lower mold base are buckled, so that the front cover and the rear cover can be buckled. After the front cover and the rear cover are buckled, the front cover and the rear cover are connected by screws. The buckling device is suitable for buckling the front cover and the rear cover of the backrest of the structure, avoiding the problem of poor buckling and the need for repeated buckling when two people hold the front cover or the rear cover manually. The buckling device can be used to buckle the front cover and the rear cover at one time, thereby improving the processing efficiency of the backrest cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an existing backrest cover;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of a front and rear cover buckling device for a seat back cover provided by the utility model;

[0020] Figure 3 yes Figure 2 A cross-sectional view of a front and rear cover fastening device for a seat back cover;

[0021] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of a front and rear cover fastening device for a seat back cover omitting the front cover;

[0022] Figure 5 yes Figure 4 A schematic diagram of the three-dimensional structure of a front and rear cover fastening device for a seat back cover when the abutting rod is in a state of abutting the front cover;

[0023] Figure 6 yes Figure 5A schematic diagram of a three-dimensional structure of a front and rear cover fastening device for a seat back cover at another viewing angle;

[0024] Figure 7 yes Figure 5 A three-dimensional structural schematic diagram of a front and rear cover buckling device fixing mechanism for a seat back cover;

[0025] In the figure: 100 - backrest cover, 110 - front cover, 111 - through groove, 120 - rear cover, 130 - mounting plate, 131 - mounting hole, 200 - positioning mechanism, 210 - lower die seat, 211 - first cavity, 212 - first mounting groove, 220 - upper die seat, 221 - second cavity, 222 - receiving groove, 223 - slide groove, 224 - screw hole, 225 - second mounting groove, 230 - guide rod, 240 - positioning rod, 250 - positioning seat, 251 - positioning groove, 300 - fixing mechanism, 310 - fixing member, 311 - mounting rod, 312 - tightening rod, 313 - connecting rod, 320 - driving member, 321 - moving seat, 3211 - docking cavity, 322 - docking column, 323 - screw rod. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The utility model provides a front and rear cover buckling device for a seat back cover, the structure of which is as follows Figure 2 - Figure 5 As shown, it includes a positioning mechanism 200 and a fixing mechanism 300, the positioning mechanism 200 includes a lower die base 210 and an upper die base 220, the upper surface of the lower die base 210 is provided with a first cavity 211 for placing the rear cover 120, the upper die base 220 is arranged directly above the lower die base 210 and can move up and down, and the lower surface of the upper die base 220 is provided with a second cavity 221 for placing the front cover 110; the fixing mechanism 300 is arranged on the upper die base 220, and includes a fixing member 310 and a driving member 320, the fixing member 310 is rotatably installed on the upper die base 220, and the driving member 320 is connected to one end of the fixing member 310, and is used to drive the other end of the fixing member 310 to press against or release the front cover 110.

[0028] When in use, the rear cover 120 is placed in the first cavity 211, and the front cover 110 is placed in the second cavity 221. By operating the driving member 320, the driving member 320 can drive the other end of the fixing member 310 to press against the front cover 110, so that the front cover 110 can be fixed on the upper die base 220, and then the upper die base 220 is moved downward so that the upper die base 220 is buckled with the lower die base 210, so that the front cover 110 and the rear cover 120 can be buckled. After the front cover 110 and the rear cover 120 are buckled, the front cover 110 and the rear cover 120 are connected by screws. After the front cover 110 and the rear cover 120 are connected, the driving member 320 is operated. 0, so that the driving member 320 can drive the other end of the fixing member 310 to release the front cover 110, so that the front cover 110 can be separated from the upper mold base 220, and then the upper mold base 220 is moved upward to separate the upper mold base 220 from the lower mold base 210, and the backrest cover 100 can be taken out. The present fastening device is suitable for fastening the front cover 110 and the rear cover 120 of the backrest of the present structure, so as to avoid the problem of inadequate fastening and the need for repeated fastening when two people hold the front cover 110 or the rear cover 120 for manual fastening respectively. The present fastening device can realize the fastening of the front cover 110 and the rear cover 120 at one time, thereby improving the processing efficiency of the backrest cover 100.

[0029] As a preferred embodiment, please refer to Figure 2 and Figure 3 The positioning mechanism 200 also includes at least two guide rods 230, each of which is vertically arranged, and the lower end of each of the guide rods 230 is fixed on the lower mold base 210. The upper mold base 220 is slidably sleeved on each of the guide rods 230. The upper mold base 220 can be guided to move up and down through each of the guide rods 230, thereby improving the accuracy and stability of the upper mold base 220's up and down movement and avoiding the problem of the upper mold base 220 being offset.

[0030] As a preferred embodiment, please refer to Figure 2 and Figure 3 The positioning mechanism 200 also includes at least two positioning rods 240, the upper end of each positioning rod 240 is hinged on the upper mold base 220, and the lower end of each positioning rod 240 is used to abut against the upper surface of the lower mold base 210. When the upper mold base 220 moves upward for a certain distance, the positioning rods 240 are rotated so that the lower end of each positioning rod 240 abuts against the upper surface of the lower mold base 210, thereby supporting the upper mold base 220, so that the upper mold base 220 can be maintained at a relative height, which is convenient for placing the front cover 110 into the second cavity 221.

[0031] As a preferred embodiment, please refer to Figure 2 and Figure 3 The positioning mechanism 200 also includes at least two positioning seats 250, each of which is fixed on the outer side wall of the lower mold base 210 and corresponds to each of the positioning rods 240. The upper surface of the positioning seat 250 is provided with a positioning groove 251 for the lower end of the positioning rod 240 to be inserted into. The lower end of each positioning rod 240 is respectively inserted into the corresponding positioning groove 251, which can avoid the positioning rod 240 from moving when supporting the upper mold base 220, and improve the stability of the positioning rod 240 when supporting. When the lower end of the positioning rod 240 needs to be taken out of the positioning groove 251, the upper mold base 220 is moved upward so that each of the positioning rods 240 can be moved out of the corresponding positioning groove 251, and then each of the positioning rods 240 is rotated sideways to a certain angle.

[0032] As a preferred embodiment, please refer to Figure 5 and Figure 6 A receiving groove 222 is provided on the upper mold base 220, and the receiving groove 222 is communicated with the second cavity 221. When the front cover 110 is placed in the second cavity 221, the through groove 111 on the front cover 110 corresponds to the receiving groove 222, so that the fixing member 310 is conveniently arranged in the receiving groove 222.

[0033] As a preferred embodiment, please refer to Figure 5 and Figure 6 There are several fixing members 310, one end of each fixing member 310 is arranged in the receiving groove 222, and the other end of each fixing member 310 extends into the second cavity 221. The driving member 320 is connected to one end of each fixing member 310 to drive the other end of each fixing member 310 to tighten or loosen the inner side wall of the back plate of the front cover 110. Arranging multiple fixing members 310 can improve the fixing effect of the front cover 110.

[0034] As a preferred embodiment, please refer to Figure 6 and Figure 7The fixing member 310 includes a mounting rod 311, a clamping rod 312 and a connecting rod 313. The mounting rod 311 is arranged in the receiving groove 222. One end of the mounting rod 311 is rotatably mounted on the upper mold base 220 via a rotating shaft. One end of the clamping rod 312 is fixedly connected to the middle position of the mounting rod 311. The other end of the clamping rod 312 extends into the second mold cavity 221 and is used to clamp or loosen the inner side wall of the back plate of the front cover 110. The connecting rod 313 is arranged in the receiving groove 222. In the receiving groove 222, one end of the connecting rod 313 is hinged to the other end of the mounting rod 311, and the driving member 320 is connected to the other end of each connecting rod 313, and is used to drive each connecting rod 313 to move in the horizontal direction. When the driving member 320 drives each connecting rod 313 to move in the horizontal direction, the connecting rod 313 will push the mounting rod 311 to rotate around its rotating axis, thereby driving the clamping rod 312 to clamp or loosen the inner side wall of the back plate of the front cover 110.

[0035] As a preferred embodiment, please refer to Figure 6 The upper mold base 220 is also provided with a slide groove 223 and a screw hole 224. The slide groove 223 has a first end with an opening and a second end with a sealing, and is connected to the receiving groove 222 via the first end. One end of the screw hole 224 is connected to the second end of the slide groove 223. The slide groove 223 can guide the movement of the movable seat 321.

[0036] As a preferred embodiment, please refer to Figure 6 and Figure 7 The driving member 320 includes a moving seat 321, a docking column 322 and a screw rod 323. One end of the moving seat 321 is slidably arranged in the slide groove 223. The other end of the connecting rod 313 is hinged to the other end of the moving seat 321. A docking cavity 3211 of a columnar structure extending along the length direction of the slide groove 223 is provided in the moving seat 321. The docking column 322 is rotatably arranged in the docking cavity 3211. One end of the screw rod 323 is arranged outside the upper mold seat 220. The other end of the screw rod 323 passes through the screw hole 224 and rotates through the moving seat 32 1 extends into the docking cavity 3211 to be fixedly connected with the docking column 322, and the screw rod 323 is screwed with the screw hole 224. By rotating the screw rod 323 forward or reversely, since the screw rod 323 is screwed with the screw hole 224, when the screw rod 323 is rotating, the screw rod 323 moves along the length direction of the slide slot 223, and the docking column 322 is rotated and engaged with the docking cavity 3211, so as to drive the moving seat 321 to move along the length direction of the slide slot 223, and further drive each of the connecting rods 313 to move forward or backward along the length direction of the slide slot 223.

[0037] As a preferred embodiment, please refer to Figure 7 The diameter of the docking column 322 is greater than the diameter of the screw rod 323 , so that the screw rod 323 and the moving seat 321 can be rotated and connected through the docking column 322 .

[0038] As a preferred embodiment, please refer to Figure 2 A plurality of first mounting grooves 212 are also provided on the outer side wall of the lower mold base 210. When the rear cover 120 is placed in the first cavity 211, each mounting piece 130 on the rear cover 120 corresponds to each of the first mounting grooves 212 one by one, so that each mounting piece 130 on the rear cover 120 can be located outside the lower mold base 210.

[0039] As a preferred embodiment, please refer to Figure 2 A plurality of second mounting grooves 225 are also provided on the outer side wall of the upper mold base 220. When the front cover 110 is placed in the second cavity 221, each mounting piece 130 on the front cover 110 corresponds to each of the second mounting grooves 225 one by one, so that each mounting piece 130 on the front cover 110 can be located outside the upper mold base 220, so that screws can be passed through the corresponding upper and lower mounting holes 131 to realize the connection between the front cover 110 and the rear cover 120.

[0040] In order to better understand the present invention, the following Figure 1 - Figure 7 The working principle of the technical solution of the utility model is described in detail:

[0041] When in use, the upper mold base 220 is moved upward by a certain distance, and each of the positioning rods 240 is rotated so that the lower ends of each of the positioning rods 240 are respectively inserted into the corresponding positioning grooves 251, so that the upper mold base 220 can be supported by each of the positioning rods 240, so that the upper mold base 220 can be maintained at a relative height, and then the rear cover 120 is placed in the first cavity 211, and the front cover 110 is placed in the second cavity 221, and the screw rod 323 is rotated forward. Since the screw rod 323 is screwed with the screw hole 224, when the screw rod 323 is in the process of forward rotation, the screw rod 323 will move along the length direction of the slide groove 223, and connect with the connecting column 322 through the connecting column 322. The rotation of the docking cavity 3211 drives the moving seat 321 to move forward along the length direction of the slide slot 223, and then drives each of the connecting rods 313 to move forward along the length direction of the slide slot 223. The connecting rod 313 pushes the mounting rod 311 to rotate around its rotating axis, thereby driving the pressing rod 312 to press against the inner side wall of the back plate of the front cover 110, so that the front cover 110 can be fixed on the upper mold base 220, and then the upper mold base 220 is moved upward, so that each of the positioning rods 240 can be moved out of the corresponding positioning groove 251, and each of the positioning rods 240 is rotated sideways to a certain angle, so that the support of each of the positioning rods 240 on the upper mold base 220 can be released, and the upper mold base 220 can be fixed. 0 moves downward, so that the upper die seat 220 is buckled with the lower die seat 210, so that the front cover 110 and the rear cover 120 can be buckled, and then the front cover 110 and the rear cover 120 are connected by screws. After the front cover 110 and the rear cover 120 are connected, the screw rod 323 is reversed. When the screw rod 323 is in the process of reversing, the screw rod 323 will retreat along the length direction of the slide groove 223, and through the rotation card connection of the docking column 322 and the docking cavity 3211, the moving seat 321 is driven to move backward along the length direction of the slide groove 223, and then the connecting rods 313 are driven to retreat along the length direction of the slide groove 223. The connecting rods 313 will drive The mounting rod 311 rotates around its rotating axis, thereby driving the clamping rod 312 to loosen the inner side wall of the back plate of the front cover 110, so that the front cover 110 can be separated from the upper mold base 220, and then the upper mold base 220 is moved upward to separate the upper mold base 220 from the lower mold base 210, and the backrest cover 100 can be taken out. The present snap-fitting device is suitable for snapping the front cover 110 and the rear cover 120 of the backrest of the present structure, avoiding the problem of poor snapping and the need for repeated snapping when two people hold the front cover 110 or the rear cover 120 manually. The present snap-fitting device can be used to snap the front cover 110 and the rear cover 120 at one time, thereby improving the processing efficiency of the backrest cover 100.

[0042] The utility model provides a front and rear cover buckling device for a seat back cover, which has the following beneficial effects:

[0043] (1) The lower ends of the positioning rods 240 are respectively inserted into the corresponding positioning grooves 251, so that the upper mold base 220 can be supported by the positioning rods 240, and the positioning rods 240 can be prevented from moving when supporting the upper mold base 220, thereby improving the stability of the positioning rods 240 when supporting. When the lower ends of the positioning rods 240 need to be taken out of the positioning grooves 251, the upper mold base 220 is moved upward so that the positioning rods 240 can be moved out of the corresponding positioning grooves 251, and then the positioning rods 240 are rotated sideways to a certain angle;

[0044] (2) By rotating the screw rod 323 forward or reversely, since the screw rod 323 is threadedly connected to the screw hole 224, when the screw rod 323 is rotating, the screw rod 323 will move along the length direction of the slide groove 223, and the docking column 322 will be rotated and engaged with the docking cavity 3211, thereby driving the moving seat 321 to move along the length direction of the slide groove 223, and then driving each of the connecting rods 313 to move forward or backward along the length direction of the slide groove 223, and the connecting rod 313 will push the installation rod 311 to rotate around its rotation axis, thereby driving the clamping rod 312 to clamp or loosen the inner side wall of the back plate of the front cover 110;

[0045] (3) The present fastening device is suitable for fastening the front cover 110 and the rear cover 120 of the backrest of the present structure, thereby avoiding the problem of improper fastening and the need for repeated fastening that may occur when two people hold the front cover 110 or the rear cover 120 manually to fasten them. The present fastening device can fasten the front cover 110 and the rear cover 120 in one time, thereby improving the processing efficiency of the backrest cover 100.

[0046] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A front and rear cover fastening device for a seat back cover, characterized in that: include: The positioning mechanism comprises a lower die seat and an upper die seat, wherein the upper surface of the lower die seat is provided with a first cavity for placing the rear cover, the upper die seat is arranged directly above the lower die seat and can move up and down, and the lower surface of the upper die seat is provided with a second cavity for placing the front cover; The fixing mechanism is arranged on the upper die base, and comprises a fixing part and a driving part. The fixing part is rotatably mounted on the upper die base, and the driving part is connected to one end of the fixing part and is used to drive the other end of the fixing part to tighten or loosen the front cover.

2. The front and rear cover fastening device for a seat back cover according to claim 1, characterized in that: The positioning mechanism also includes at least two guide rods, each of which is vertically arranged, and the lower end of each of the guide rods is fixed on the lower die seat, and the upper die seat is slidably sleeved on each of the guide rods.

3. The front and rear cover fastening device for a seat back cover according to claim 1, characterized in that: The positioning mechanism further comprises at least two positioning rods, the upper end of each of the positioning rods is hinged to the upper die base, and the lower end of each of the positioning rods is used to abut against the upper surface of the lower die base.

4. The front and rear cover fastening device for a seat back cover according to claim 3, characterized in that: The positioning mechanism also includes at least two positioning seats, each of which is fixed on the outer side wall of the lower mold base and corresponds to each of the positioning rods. The upper surface of the positioning seat is provided with a positioning groove for the lower end of the positioning rod to be inserted into.

5. The front and rear cover fastening device for a seat back cover according to claim 1, characterized in that: The upper die seat is provided with a receiving groove, which is communicated with the second cavity. When the front cover is placed in the second cavity, the through groove on the front cover corresponds to the receiving groove.

6. The front and rear cover fastening device for a seat back cover according to claim 5, characterized in that: There are a plurality of fixing members, one end of each of which is arranged in the receiving groove, and the other end of each of which extends into the second cavity, and the driving member is connected to one end of each of the fixing members to drive the other end of each of the fixing members to tighten or loosen the inner side wall of the back plate of the front cover.

7. The front and rear cover fastening device for a seat back cover according to claim 6, characterized in that: The fixing member includes a mounting rod, a clamping rod and a connecting rod, the mounting rod is arranged in the receiving groove, one end of the mounting rod is rotatably mounted on the upper mold base via a rotating shaft, one end of the clamping rod is fixedly connected to the middle position of the mounting rod, the other end of the clamping rod extends into the second cavity, and is used to clamp or loosen the inner side wall of the back plate of the front cover, the connecting rod is arranged in the receiving groove, one end of the connecting rod is hinged to the other end of the mounting rod, and the driving member is connected to the other end of each of the connecting rods, and is used to drive each of the connecting rods to move in the horizontal direction.

8. The front and rear cover fastening device for a seat back cover according to claim 7, characterized in that: The upper die base is also provided with a slide groove and a screw hole. The slide groove has a first end with an opening and a second end with a sealing, and is connected to the receiving groove via the first end. One end of the screw hole is connected to the second end of the slide groove.

9. The front and rear cover fastening device for a seat back cover according to claim 8, characterized in that: The driving member includes a moving seat, a docking column and a screw rod. One end of the moving seat is slidably arranged in the slide groove, and the other end of the connecting rod is hinged to the other end of the moving seat. A docking cavity with a columnar structure extending along the length direction of the slide groove is provided in the moving seat. The docking column is rotatably arranged in the docking cavity. One end of the screw rod is arranged on the outside of the upper mold seat, and the other end of the screw rod passes through the screw hole and rotates through the moving seat to extend into the docking cavity to be fixedly connected to the docking column. The screw rod is screwed to the screw hole.

10. The front and rear cover fastening device for a seat back cover according to claim 9, characterized in that: The diameter of the docking column is greater than the diameter of the screw rod.

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