Mobile phone case size detection device

Abstract

The present invention discloses a mobile phone case size detection device, wherein a slide is movably arranged in the middle of a base, a turntable is rotatably arranged at the bottom of the slide, the turntable is linked with the slide, and a calibration block is arranged on the slide; a gantry frame includes longitudinal brackets arranged on the top of the base in a vertical direction and respectively located on both sides of the moving track of the slide, a crossbeam is connected between the tops of the longitudinal brackets, the extension direction of the crossbeam is perpendicular to the moving direction of the slide, a horizontal guide rail is arranged below the crossbeam, and the two ends of the horizontal guide rail are movably connected to the longitudinal bracket; a left fixed frame and a right fixed frame are movably arranged on the horizontal guide rail along the extension direction thereof, and a rotating block is rotatably arranged on the left fixed frame and the right fixed frame respectively, and the extension direction of the rotation axis of the rotating block is consistent with the moving direction of the slide. The mobile phone case size detection device can accurately and efficiently perform size detection on mobile phone case products.

Description

Technical Field

[0001] The invention relates to the technical field of mobile phone shell processing and manufacturing supporting equipment, and in particular to a mobile phone shell size detection device. Background Art

[0002] The back shell (or frame, hereinafter referred to as the phone case) of common high-end smartphones is generally made of metal, and the processing method is relatively complicated. One of the important processing steps in the processing is machine tool machining. If the precision of the machining is not up to standard, it will affect the assembly gap between the phone case and the glass screen, so the size of the processed phone case must be checked.

[0003] Traditional mobile phone case size inspection and detection methods in this field are usually contact or laser measurement methods. The inspection process requires a series of complex processes such as calibration, positioning, and data reading. The inspection process is relatively cumbersome, inefficient, and very time-consuming and labor-intensive. It is difficult to complete the measurement of all products. Therefore, in the actual production process, many manufacturers adopt random inspections to detect the size of mobile phone case products. However, the random inspection method cannot guarantee that the size specifications of all products meet the product production requirements. Therefore, it is very easy to cause a very high product defective rate in the subsequent component assembly process, resulting in a waste of raw materials and production capacity, and also has an adverse impact on the overall processing and manufacturing process of related mobile phone products.

[0004] Therefore, how to provide a mobile phone case size detection device that can accurately and efficiently perform size detection on mobile phone case products is an important technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a mobile phone shell size detection device, which can accurately and efficiently perform size detection on mobile phone shell products.

[0006] In order to solve the above technical problems, the present invention provides a mobile phone case size detection device, comprising a housing and an operation panel, wherein a base and a gantry frame arranged on the top of the base are arranged in the housing, a slide is arranged in the middle of the base so as to be movable in the horizontal direction, a turntable is arranged at the bottom of the slide so as to be rotatable about a fixed axis, the turntable is linked with the slide, and calibration blocks respectively adapted to the sides of the mobile phone case are arranged on the slide;

[0007] The gantry comprises longitudinal brackets arranged on the top of the base in the vertical direction and respectively located on both sides of the moving track of the slide, a horizontal beam extending in the horizontal direction is connected between the tops of the longitudinal brackets, the extension direction of the horizontal beam is perpendicular to the moving direction of the slide, a horizontal guide rail is arranged below the horizontal beam and parallel to the horizontal beam, and both ends of the horizontal guide rail are respectively connected to the longitudinal brackets so as to be movably connected in the vertical direction;

[0008] A left fixing frame and a right fixing frame are movably provided on the horizontal guide rail along its extension direction, and a rotating block connected to the camera is respectively rotatably provided on the left fixing frame and the right fixing frame, and the extension direction of the rotation axis of the rotating block is consistent with the moving direction of the slide.

[0009] Preferably, the base comprises a top plate and a bottom plate extending in a horizontal direction and arranged in sequence from top to bottom, and the middle portion of the top plate has a slide groove extending in a moving direction of the slide;

[0010] The bottom plate is provided with a horizontal linear module capable of driving the slide and the turntable to move, and the turntable is connected with a rotary motor capable of driving the turntable to rotate on a fixed axis.

[0011] Preferably, the horizontal linear module is located below the top plate.

[0012] Preferably, an adjusting screw is provided at the end of the cross beam parallel to the longitudinal bracket, the adjusting screw passes through the end of the horizontal guide rail in the vertical direction and is threadedly engaged with the end of the horizontal guide rail, and a rotating wheel coaxially linked to the top protruding end of the adjusting screw is provided on the cross beam.

[0013] Preferably, a handle is provided on the rotating wheel.

[0014] Preferably, there are four longitudinal brackets, and two brackets are arranged in a group on both sides of the moving track of the slide, and the adjusting screw is located between the two longitudinal brackets on the same side.

[0015] Preferably, a mounting base plate is provided below the cross beam, and the horizontal guide rail is specifically located on the mounting base plate.

[0016] Preferably, a left cylinder for driving the left fixing frame to move and a right cylinder for driving the right fixing frame to move are respectively provided at both ends of the mounting base plate.

[0017] Preferably, the left fixing frame and the right fixing frame are respectively provided with an angle adjustment motor capable of driving the rotating block to rotate on a fixed axis.

[0018] Compared with the above-mentioned background technology, the mobile phone case size detection device provided by the present invention places the mobile phone case to be detected on the slide during its operation, and makes each calibration block align and fit with the corresponding side edge of the mobile phone case, and at the same time adjusts the matching position of the horizontal guide rail and the longitudinal bracket in the vertical direction so that the horizontal guide rail and its related camera and other components are at an appropriate height, and adjusts the left fixed frame and the right fixed frame to move appropriately along the extension direction of the horizontal guide rail so that the distance between the camera on the left fixed frame and the camera on the right fixed frame can be adapted to the corresponding side length of the mobile phone case to be detected at this time, and appropriately adjusts each rotating block to rotate a certain angle so that each camera has an appropriate shooting positioning angle, and then controls the slide to move from one end of the base to the other end in the horizontal direction, at which time the cameras on the left and right fixed frames respectively shoot and obtain the size specifications and structural features of the two sides of the mobile phone case, and at the same time obtain the structural features of the calibration blocks corresponding to the corresponding sides, and accordingly obtain the spacing size parameters of the corresponding opposite sides of the mobile phone case, and compare the size parameters with The spacing parameters of the corresponding calibration blocks are used as reference comparison to obtain the accurate spacing size of the opposite sides of the mobile phone case; then the turntable is controlled to rotate 90°, and the camera spacing on the left and right fixed frames is adjusted according to the adjustment method described above to adapt to the other set of opposite sides of the mobile phone case to be tested and the corresponding calibration block position, and then the slide is controlled to move in the opposite direction to the initial position in the horizontal direction. At this time, the cameras on the left and right fixed frames respectively shoot and obtain the size specifications and structural characteristics of the current two sides of the mobile phone case, and at the same time obtain the structural characteristics of the calibration blocks corresponding to the corresponding sides, and accordingly obtain the spacing size parameters of the current corresponding opposite sides of the mobile phone case, and compare the size parameters with the spacing parameters of the corresponding calibration blocks for reference comparison to obtain the accurate spacing size of the other set of opposite sides of the mobile phone case. After completing the above-mentioned size detection, the two sets of opposite side size parameters obtained are integrated to obtain the overall structural size parameters of the current mobile phone case to be tested, so as to complete the accurate measurement of the length and width of the corresponding mobile phone case. The entire working process of the mobile phone case size detection equipment is fast and efficient, and the detection data is accurate and reliable, which can effectively guarantee the production and assembly efficiency and product qualification rate of the corresponding mobile phone case.

[0019] In another preferred embodiment of the present invention, the base comprises a top plate and a bottom plate extending in the horizontal direction and arranged in sequence from top to bottom, the middle part of the top plate has a slide groove extending in the moving direction of the slide; the bottom plate is provided with a horizontal linear module that can drive the slide and the turntable to move, and the turntable is connected to a rotary motor that can drive the turntable to rotate on a fixed axis. The slide groove can implement a certain limit and guide effect on the movement process of the slide to ensure that the movement trajectory of the slide is stable and controllable. At the same time, the double-layer structure composed of the top plate and the bottom plate helps to further optimize the internal structure of the base and avoid structural interference between the main component structures such as the horizontal linear module and the slide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the external structure of a mobile phone case size detection device provided by a specific embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0023] Figure 3 for Figure 2 Schematic diagram of the local structure of the middle gantry;

[0024] Figure 4 for Figure 3 Schematic diagram of the assembly of components of the middle horizontal rail section;

[0025] Figure 5 for Figure 2 Schematic diagram of the local structure of the middle base part;

[0026] Figure 6 for Figure 5 Structural solid diagram of the midsole plate and its mating parts. DETAILED DESCRIPTION

[0027] The core of the present invention is to provide a mobile phone shell size detection device, which can accurately and efficiently perform size detection on mobile phone shell products.

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of the external structure of a mobile phone case size detection device provided by a specific embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the internal structure; Figure 3 for Figure 2 Schematic diagram of the local structure of the middle gantry; Figure 4 for Figure 3 Schematic diagram of the assembly of components of the middle horizontal rail section; Figure 5 for Figure 2 Schematic diagram of the local structure of the middle base part; Figure 6 for Figure 5Structural solid diagram of the midsole plate and its mating parts.

[0030] In a specific embodiment, the mobile phone case size detection device provided by the present invention includes a shell 10 and an operating panel 20, wherein a base 200 and a gantry 100 arranged on the top of the base 200 are arranged in the shell 10, a slide 21 is arranged in the middle of the base 200 so as to be movable in the horizontal direction, a turntable 23 is arranged on the bottom of the slide 21 so as to be rotatable on a fixed axis, the turntable 23 is linked with the slide 21, and calibration blocks 211 respectively adapted to the sides of the mobile phone case 30 are arranged on the slide 21; the gantry 100 includes a longitudinal bracket 11 arranged on the top of the base 200 in the vertical direction and respectively located on both sides of the moving track of the slide 21, and the longitudinal bracket A crossbeam 12 extending in a horizontal direction is connected between the tops of 11, and the extending direction of the crossbeam 12 is perpendicular to the moving direction of the slide 21. A horizontal guide rail 13 is arranged below the crossbeam 12 and parallel to the crossbeam 12, and both ends of the horizontal guide rail 13 are respectively connected to the longitudinal bracket 11 movably along the vertical direction; a left fixed frame 131 and a right fixed frame 132 are movably arranged on the horizontal guide rail 13 along its extending direction, and a rotating block 133 connected to the camera 40 is respectively rotatably arranged on the left fixed frame 131 and the right fixed frame 132, and the extending direction of the rotating axis of the rotating block 133 is consistent with the moving direction of the slide 21.

[0031] During the working process, the mobile phone case 30 to be tested is placed on the slide 21, and each calibration block 211 is aligned and matched with the corresponding side edge of the mobile phone case 30, and the matching position of the horizontal guide rail 13 and the longitudinal bracket 11 is adjusted in the vertical direction so that the horizontal guide rail 13 and its related camera 40 and other components are at an appropriate height, and the left fixing frame 131 and the right fixing frame 132 are adjusted to move appropriately along the extension direction of the horizontal guide rail 13 so that the distance between the camera on the left fixing frame 131 and the camera on the right fixing frame 132 can be aligned with the corresponding side edge of the mobile phone case 30 to be tested at this time. The side length is adapted, and each rotating block 133 is appropriately adjusted to rotate a certain angle so that each camera 40 has an appropriate shooting positioning angle, and then the slide 21 is controlled to move horizontally from one end of the base 200 to the other end. At this time, the cameras on the left fixing frame 131 and the right fixing frame 132 respectively shoot and obtain the size specifications and structural features of the two sides of the mobile phone case 40, and at the same time obtain the structural features of the calibration block 211 corresponding to the corresponding side, and accordingly obtain the spacing size parameters of the corresponding opposite sides of the mobile phone case 40, and compare the size parameters with the corresponding calibration block 211. The spacing parameters are used as a reference for comparison to obtain the accurate spacing size of the two sides of the mobile phone case; then the turntable 23 is controlled to rotate 90° on a fixed axis, and the spacing between the cameras 30 on the left fixing frame 131 and the right fixing frame 132 is adjusted according to the adjustment method described above to adapt to the other set of pairs of sides of the mobile phone case 40 being measured and the corresponding position of the calibration block 211, and then the slide 21 is controlled to move in the opposite direction in the horizontal direction to the initial position. At this time, the cameras 211 on the left fixing frame 131 and the right fixing frame 132 respectively shoot and obtain the current sizes of the two sides of the mobile phone case 40. The size specifications and structural features of the mobile phone case 40 are obtained, and the structural features of the calibration block 211 corresponding to the corresponding side are obtained at the same time, and the spacing size parameters of the current corresponding opposite side of the mobile phone case 40 are obtained accordingly, and the size parameters are compared with the spacing parameters of the corresponding calibration block 211 for reference, so as to obtain the accurate spacing size of another group of opposite side of the mobile phone case 40. After completing the above-mentioned size detection, the two groups of opposite side size parameters obtained are integrated to obtain the overall structural size parameters of the current mobile phone case 40 being tested, so as to complete the accurate measurement of the length and width of the corresponding mobile phone case 40. The entire working process of the mobile phone case size detection equipment is fast and efficient, and the detection data is accurate and reliable, which can effectively guarantee the production and assembly efficiency and product qualification rate of the corresponding mobile phone case.

[0032] Furthermore, the base 200 includes a top plate 201 and a bottom plate 202 extending in the horizontal direction and arranged in sequence from top to bottom, and the middle part of the top plate 201 has a slide groove 203 extending in the moving direction of the slide 21; the bottom plate 202 is provided with a horizontal linear module 22 that can drive the slide 21 and the turntable 23 to move, and the turntable 23 is connected with a rotary motor 231 that can drive the turntable 23 to rotate on a fixed axis. The slide groove 21 can implement a certain limit and guide effect on the moving process of the slide 23 to ensure that the moving trajectory of the slide 21 is stable and controllable. At the same time, the double-layer structure formed by the top plate 201 and the bottom plate 202 is helpful to further optimize the internal structure of the base 200 and avoid structural interference between the main component structures such as the horizontal linear module 22 and the slide groove 203.

[0033] More specifically, the horizontal linear module 22 is located below the top plate 201. Placing the horizontal linear module 22 below the top plate 201 helps to further avoid structural interference between the horizontal linear module 22 and the components on the top of the top plate 201, and fully utilizes the remaining space between the top plate 201 and the bottom plate 202.

[0034] On the other hand, an adjusting screw 14 is provided at the end of the crossbeam 12 in parallel with the longitudinal bracket 11. The adjusting screw 14 passes through the end of the horizontal guide rail 13 in the vertical direction and is threadedly matched with the end of the horizontal guide rail 13. A rotating wheel 141 is provided on the crossbeam 12 and is coaxially linked with the top protruding end of the adjusting screw 14. Through the coordinated cooperation between the adjusting screw 14 and the horizontal guide rail 13, the vertical position of the camera 40 can be adjusted accurately and efficiently.

[0035] In addition, a handle 142 is provided on the rotating wheel 141. The handle 142 can further improve the operating convenience of the rotating wheel 141 and the adjusting screw 14, so as to further improve the adjustment efficiency of the vertical position of the relevant components.

[0036] Furthermore, there are four longitudinal brackets 11, and two are arranged in a group on both sides of the moving track of the slide 21, and the adjusting screw 14 is located between the two longitudinal brackets 11 on the same side. The longitudinal brackets 11 arranged in pairs of two can further optimize the stress distribution and structural reliability between them and the crossbeam 12.

[0037] In addition, a mounting base plate 15 is provided below the crossbeam 12, and the horizontal guide rail 13 is specifically located on the mounting base plate 15. The mounting base plate 15 can provide sufficient structural support for the horizontal guide rail 13 and other related components, and avoid structural interference with the main working components such as the horizontal guide rail 13.

[0038] More specifically, the two ends of the mounting base 15 are respectively provided with a left cylinder 134 for driving the left fixing frame 131 to move and a right cylinder 135 for driving the right fixing frame 132 to move. The operation process of such cylinders is continuous and stable, and can fully ensure the horizontal adjustment efficiency and adjustment accuracy of each fixing frame.

[0039] In addition, the left fixing frame 131 and the right fixing frame 132 are respectively provided with an angle adjustment motor (not shown in the figure) which can drive the rotating block 133 to rotate on a fixed axis. The working efficiency of the motor is relatively high, and the use of the angle adjustment motor can further improve the accuracy and efficiency of the shooting angle adjustment of each fixing frame and the camera 40, thereby ensuring the shooting effect of the camera 40 on the mobile phone case 30.

[0040] In summary, the mobile phone case size detection device provided in the present invention places the mobile phone case to be detected on the slide during its operation, and makes each calibration block align and fit with the corresponding side edge of the mobile phone case, and at the same time adjusts the matching position of the horizontal guide rail and the longitudinal bracket in the vertical direction so that the horizontal guide rail and its related camera and other components are at an appropriate height, and adjusts the left and right fixed frames to move appropriately along the extension direction of the horizontal guide rail so that the distance between the camera on the left fixed frame and the camera on the right fixed frame can be adapted to the corresponding side length of the mobile phone case to be detected at this time, and appropriately adjusts each rotating block to rotate a certain angle so that each camera has an appropriate shooting positioning angle, and then controls the slide to move from one end of the base to the other end in the horizontal direction, at which time the cameras on the left and right fixed frames respectively shoot and obtain the size specifications and structural features of the two sides of the mobile phone case, and at the same time obtain the structural features of the calibration blocks corresponding to the corresponding sides, and accordingly obtain the spacing size parameters of the corresponding opposite sides of the mobile phone case, and compare the size parameters with the corresponding The spacing parameters of the calibration block are used as a reference for comparison to obtain the accurate spacing size of the opposite sides of the mobile phone case; then the turntable is controlled to rotate 90°, and the camera spacing on the left and right fixed frames is adjusted according to the adjustment method described above to adapt to the other set of opposite sides of the mobile phone case to be tested and the corresponding calibration block position, and then the slide is controlled to move in the opposite direction to the initial position in the horizontal direction. At this time, the cameras on the left and right fixed frames respectively shoot and obtain the size specifications and structural features of the current two sides of the mobile phone case, and at the same time obtain the structural features of the calibration block corresponding to the corresponding side, and obtain the spacing size parameters of the current corresponding opposite sides of the mobile phone case, and compare the size parameters with the spacing parameters of the corresponding calibration block for reference to obtain the accurate spacing size of the other set of opposite sides of the mobile phone case. After completing the above-mentioned size detection, the two sets of opposite side size parameters obtained are integrated to obtain the overall structural size parameters of the current mobile phone case to be tested, so as to complete the accurate measurement of the length and width of the corresponding mobile phone case. The entire working process of the mobile phone case size detection equipment is fast and efficient, and the detection data is accurate and reliable, which can effectively guarantee the production and assembly efficiency and product qualification rate of the corresponding mobile phone case.

[0041] The mobile phone case size detection device provided by the present invention is introduced in detail above. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A mobile phone case size detection device, characterized in that: The mobile phone case comprises a housing and an operation panel, wherein a base and a gantry frame arranged on the top of the base are arranged in the housing, a slide is arranged in the middle of the base so as to be movable in the horizontal direction, a turntable is arranged at the bottom of the slide so as to be rotatable about a fixed axis, the turntable is linked with the slide, and calibration blocks respectively adapted to the sides of the mobile phone case are arranged on the slide; The gantry comprises longitudinal brackets arranged on the top of the base in the vertical direction and respectively located on both sides of the moving track of the slide, a horizontal beam extending in the horizontal direction is connected between the tops of the longitudinal brackets, the extension direction of the horizontal beam is perpendicular to the moving direction of the slide, a horizontal guide rail is arranged below the horizontal beam and parallel to the horizontal beam, and both ends of the horizontal guide rail are respectively connected to the longitudinal brackets so as to be movably connected in the vertical direction; A left fixing frame and a right fixing frame are movably provided on the horizontal guide rail along the extension direction thereof, and a rotating block connected to the camera is rotatably provided on the left fixing frame and the right fixing frame respectively, and the extension direction of the rotation axis of the rotating block is consistent with the moving direction of the slide table; The mobile phone case to be tested is placed on the slide, and each calibration block is aligned with the corresponding side edge of the mobile phone case. At the same time, the matching position of the horizontal guide rail and the longitudinal bracket is adjusted in the vertical direction so that the horizontal guide rail and the camera are at an appropriate height, and the left and right fixed frames are adjusted to move appropriately along the extension direction of the horizontal guide rail so that the distance between the camera on the left fixed frame and the camera on the right fixed frame can be adapted to the corresponding side length of the mobile phone case to be tested at this time, and each rotating block is appropriately adjusted to rotate a certain angle so that each camera has an appropriate shooting positioning angle, and then the slide is controlled to move from one end of the base to the other end in the horizontal direction. At this time, the cameras on the left and right fixed frames respectively shoot and obtain the size specifications and structural features of the two sides of the mobile phone case, and at the same time obtain the structural features of the calibration blocks corresponding to the corresponding sides, and obtain the corresponding angles of the mobile phone case accordingly. The spacing dimension parameters of the opposite sides of the mobile phone case are measured, and the dimension parameters are compared with the spacing parameters of the corresponding calibration blocks for reference, so as to obtain the accurate spacing dimension of the opposite sides of the mobile phone case; then the turntable is controlled to rotate 90° on the fixed axis, and the camera spacing on the left and right fixed frames is adjusted to adapt to the other set of opposite sides of the mobile phone case under test and the corresponding calibration block positions, and then the slide is controlled to move in the opposite direction to the initial position in the horizontal direction. At this time, the cameras on the left and right fixed frames respectively shoot and obtain the size specifications and structural features of the current two sides of the mobile phone case, and simultaneously obtain the structural features of the calibration blocks corresponding to the corresponding sides, and accordingly obtain the spacing dimension parameters of the current corresponding opposite sides of the mobile phone case, and compare the dimension parameters with the spacing parameters of the corresponding calibration blocks for reference, so as to obtain the accurate spacing dimension of the other set of opposite sides of the mobile phone case; A mounting base plate is provided below the crossbeam, and the horizontal guide rail is specifically located on the mounting base plate; The left fixing frame and the right fixing frame are respectively provided with angle adjustment motors capable of driving the rotating block to rotate along a fixed axis.

2. The mobile phone case size detection device according to claim 1, characterized in that: The base comprises a top plate and a bottom plate extending in a horizontal direction and arranged in sequence from top to bottom, and a middle portion of the top plate has a slide groove extending in a moving direction of the slide; The bottom plate is provided with a horizontal linear module capable of driving the slide and the turntable to move, and the turntable is connected with a rotary motor capable of driving the turntable to rotate on a fixed axis.

3. The mobile phone case size detection device according to claim 2, characterized in that: The horizontal linear module is located below the top plate.

4. The mobile phone case size detection device according to claim 1, characterized in that: An adjusting screw is arranged at the end of the cross beam in parallel with the longitudinal bracket. The adjusting screw passes through the end of the horizontal guide rail in the vertical direction and is threadedly matched with the end of the horizontal guide rail. A rotating wheel coaxially linked with the top protruding end of the adjusting screw is arranged on the cross beam.

5. The mobile phone case size detection device according to claim 4, characterized in that: A handle is arranged on the rotating wheel.

6. The mobile phone case size detection device according to claim 4, characterized in that: There are four longitudinal brackets, and two brackets are arranged in a group on both sides of the moving track of the slide, and the adjusting screw is located between the two longitudinal brackets on the same side.

7. The mobile phone case size detection device according to claim 1, characterized in that: A left cylinder for driving the left fixing frame to move and a right cylinder for driving the right fixing frame to move are respectively arranged at two ends of the mounting base plate.

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