Detection device

Abstract

The utility model relates to the technical field of special-shaped end face filter stick detection, and provides a detection device, basic blocks and adjusting blocks are distributed at intervals around the axis of an insertion through hole to form a containing space used for clamping a special-shaped end face filter stick, the basic blocks are fixedly connected with a shell, and the adjusting blocks and the shell are arranged at intervals; the adjusting assembly is arranged between the adjusting block and the shell, the adjusting assembly comprises an elastic piece and a rigid piece, the elastic piece is connected with the adjusting block and the shell, so that the adjusting block always tends to be away from the side where the axis of the insertion through hole is located, and the rigid piece can drive the adjusting block to move towards the side where the axis of the insertion through hole is located; the measuring plate is installed on the end face of one axial side of the insertion through hole, scales and patterns are marked on the measuring plate, and the measuring plate is used for measuring the coaxiality and the pattern coincidence degree of the filter stick with the special-shaped end face. By changing the distance between the adjusting block and the side wall of the insertion through hole, the size of the accommodating space is adjusted to adapt to special-shaped end surface filter sticks with different thicknesses and shapes, so that the applicability of the detection equipment is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of detecting filter rods with special-shaped end surfaces, in particular to a detecting device. Background Art

[0002] The end faces of filter rods with special-shaped ends are designed into different shapes according to customer needs, such as round, star, hexagon, heart, etc. From the cross-section, filter rods with special-shaped ends are two coaxial filter rods. In the actual production process, the inner core pattern may be deformed or not centered due to the displacement of the forming paper and uneven filling of the tow, which affects the appearance quality of the filter rod.

[0003] At present, most filter rod manufacturers develop filter rod end face visual inspection devices to detect the contour, size (hollow area) and position (concentricity or centering) of the inner hole shape at one end of the special-shaped end face filter rod, and form inspection indicators by comparing the pictures with the standard graphics. However, visual inspection equipment has problems such as long design and development cycle, delayed application, and difficulty in collecting complex graphics dimensions.

[0004] Moreover, the error rate of the visual inspection device is extremely high when it is in use. The reason is that the end face of the special-shaped filter rod is not parallel to the camera, and the angle deviation causes the visual inspection device to always make mistakes when acquiring images and subsequent comparisons.

[0005] Some existing manufacturers set up a tubular space, insert the special-shaped end face filter rod into the tubular space, and use abutments to support the special-shaped end face filter rod along the radial direction of the tubular space to keep it stable, thereby making the end face of the special-shaped end face filter rod parallel to the camera. However, with such a setting, the cross-sectional shape of the tubular space is fixed, which makes it difficult to cope with special-shaped end face filter rods of different shapes or sizes.

[0006] Therefore, a detection device is urgently needed to solve the above technical problems. Utility Model Content

[0007] The utility model aims to provide a detection device which can adapt to filter rods with special-shaped end surfaces of different thicknesses and shapes, so as to make the applicability of the detection device wider.

[0008] To achieve this purpose, the utility model adopts the following technical solutions:

[0009] A detection device is used to detect the coaxiality and pattern coincidence of the end face shape of the filter rod with a special-shaped end face, and the above detection device includes:

[0010] A housing, wherein the housing is provided with a plug-in through hole along a first direction;

[0011] A cushion block, the cushion block is installed in the plug-in through hole, the cushion block includes a base block and an adjustment block, the base block and the adjustment block are spaced around the axis of the plug-in through hole to form an accommodation space for clamping the filter rod with the special-shaped end face, the base block is fixedly connected to the housing, and the adjustment block is spaced from the housing;

[0012] An adjustment component, the adjustment component is arranged between the adjustment block and the housing, the adjustment component comprises an elastic member and a rigid member, the elastic member connects the adjustment block and the housing, so that the adjustment block always has a tendency to move away from the side where the axis of the plug-in through hole is located, and the rigid member can drive the adjustment block to move toward the side where the axis of the plug-in through hole is located;

[0013] A measuring plate is installed on one end face of the axial direction of the plug-in through hole, and a scale is marked on the measuring plate for measuring the coaxiality and pattern overlap of the filter rod with the special-shaped end face.

[0014] As a preferred technical solution for the above-mentioned detection device, the side of the above-mentioned plug-in through hole axially facing away from the above-mentioned measuring plate is a plug-in interface, and the end of the above-mentioned adjustment block adjacent to the above-mentioned plug-in interface forms a guide surface, and the above-mentioned special-shaped end face filter rod can enter the above-mentioned accommodating space along the above-mentioned guide surface.

[0015] As a preferred technical solution of the above-mentioned detection device, the above-mentioned adjustment component also includes a guide column, the above-mentioned elastic member is a spring, the above-mentioned elastic member is sleeved on the outer peripheral side of the above-mentioned guide column, one axial end of the above-mentioned guide column is fixed to the above-mentioned adjustment block, and the other end is inserted into the inner peripheral wall of the above-mentioned plug-in through hole and can slide relative to the above-mentioned shell.

[0016] As a preferred technical solution of the above-mentioned detection device, there are two above-mentioned plug-in through holes, which are arranged in parallel in the second direction, and the above-mentioned measuring plate is marked with two correction scales arranged in a mirror image, which respectively correspond to the two above-mentioned plug-in through holes; the above-mentioned first direction is perpendicular to the above-mentioned second direction.

[0017] As a preferred technical solution of the above-mentioned detection device, a threaded through hole is provided on the peripheral side wall of the above-mentioned plug-in through hole, and the above-mentioned rigid member includes a threaded rod, and the above-mentioned threaded rod is threadedly connected to the above-mentioned shell.

[0018] As a preferred technical solution of the above-mentioned detection device, the above-mentioned shell is provided with n above-mentioned threaded through holes along the above-mentioned first direction, and the above-mentioned threaded rod includes m rigid parts, satisfying n≥m≥1.

[0019] As a preferred technical solution of the above-mentioned detection device, the above-mentioned rigid part also includes two optical axes and a connecting rod, the two optical axes are symmetrically arranged on opposite sides of the above-mentioned threaded rod in the above-mentioned first direction, the two optical axes and the above-mentioned threaded rod are connected by the above-mentioned connecting rod and the above-mentioned threaded rod can rotate relative to the above-mentioned connecting rod, and the above-mentioned optical axis can pass through the peripheral side wall of the above-mentioned plug-in through hole and abut against the above-mentioned adjustment block.

[0020] As a preferred technical solution of the detection device, the housing is provided with two slide grooves symmetrically in the third direction, the extension direction of the slide grooves is parallel to the second direction, and the measuring plate can be slidably inserted in the two slide grooves;

[0021] The first direction, the second direction and the third direction are perpendicular to each other.

[0022] As a preferred technical solution of the above-mentioned detection device, a limit block is provided at one end of the above-mentioned slide slot, and the above-mentioned limit block can abut against the above-mentioned measurement plate along the above-mentioned second direction.

[0023] As a preferred technical solution of the above-mentioned detection device, one of the above-mentioned adjustment blocks is configured with a plurality of elastic members, and the plurality of the above-mentioned elastic members are arranged in sequence along the above-mentioned first direction.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a detection device for detecting the coaxiality and pattern overlap of the end face shape of a filter rod with a special-shaped end face. The detection device includes a shell, a cushion block, an adjustment component and a measuring plate. The shell is provided with a plug-in through hole along a first direction; the cushion block is installed in the plug-in through hole, the cushion block includes a base block and an adjustment block, the base block and the adjustment block are spaced around the axis of the plug-in through hole to form a containing space for clamping the filter rod with a special-shaped end face, the base block is fixedly connected to the shell, and the adjustment block is spaced from the shell; the adjustment component is arranged between the adjustment block and the shell, the adjustment component includes an elastic member and a rigid member, the elastic member connects the adjustment block and the shell, so that the adjustment block always has a tendency to move away from the side where the axis of the plug-in through hole is located, and the rigid member can drive the adjustment block to move to the side where the axis of the plug-in through hole is located; the measuring plate is installed on one end face of the axial side of the plug-in through hole, and the measuring plate is marked with scales for measuring the coaxiality and pattern overlap of the filter rod with a special-shaped end face.

[0026] Specifically, when in use, the special-shaped end face filter rod to be detected is inserted into the housing from the side of the plug-in through hole facing away from the measuring plate. In the initial state, the elastic member pulls the adjustment block close to the side wall of the plug-in through hole. At this time, the accommodating space is relatively large. The special-shaped end face filter rod is inserted into the accommodating space, and the axial end face of the special-shaped end face filter rod is adjacent to the measuring plate. The rigid member can move toward the special-shaped end face filter rod against the adjustment block on the side of the adjustment block facing away from the accommodating space, and then fix the special-shaped end face filter rod with other adjustment blocks and the base block. At this time, the elastic member is in a stretched state, and the coaxiality and pattern coincidence of the axial end face of the special-shaped end face filter rod are detected by the scale of the measuring plate. When the special-shaped end face filter rod needs to be replaced, the rigid member is retracted toward the side wall of the plug-in through hole, and the elastic member recovers its deformation, and then the adjustment block is pulled to move toward the side wall of the plug-in through hole, so that the special-shaped end face filter rod can withdraw from the accommodating space.

[0027] In this way, by changing the distance between the adjusting block and the side wall of the plug-in through hole, the size of the accommodating space is adjusted to accommodate filter rods with special-shaped end faces of different thicknesses and shapes, thereby making the applicability of the detection device wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. 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 the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the detection device provided by the embodiment of the utility model;

[0030] Figure 2 It is a top view of the detection device provided by an embodiment of the utility model.

[0031] In the figure:

[0032] X, first direction; Y, second direction; Z, third direction;

[0033] 10. housing; 11. plug-in through hole;

[0034] 20. pad block; 201. guide surface; 21. base block; 22. adjustment block;

[0035] 31. Elastic parts. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figure 1 and Figure 2As shown, the utility model provides a detection device for detecting the coaxiality and pattern coincidence of the end face shape of a filter rod with a special-shaped end face. The detection device includes a housing 10, a cushion block 20, an adjustment component and a measuring plate. Among them, the shell 10 is provided with a plug-in through hole 11 along the first direction X; the cushion block 20 is installed in the plug-in through hole 11, the cushion block 20 includes a basic block 21 and an adjusting block 22, the basic block 21 and the adjusting block 22 are spaced around the axis of the plug-in through hole 11 to form a accommodating space for clamping the special-shaped end face filter rod, the basic block 21 is fixedly connected to the shell 10, and the adjusting block 22 is spaced from the shell 10; the adjusting assembly is arranged between the adjusting block 22 and the shell 10, the adjusting assembly includes an elastic member 31 and a rigid member, the elastic member 31 connects the adjusting block 22 and the shell 10, so that the adjusting block 22 always has a tendency to move away from the side where the axis of the plug-in through hole 11 is located, and the rigid member can drive the adjusting block 22 to move to the side where the axis of the plug-in through hole 11 is located; the measuring plate is installed on one side end face of the axial direction of the plug-in through hole 11, and the measuring plate is marked with scales for measuring the coaxiality and pattern overlap of the special-shaped end face filter rod.

[0041] Specifically, when in use, the filter rod with the special-shaped end face to be detected is inserted into the shell 10 from the side of the plug-in hole 11 facing away from the measuring plate. In the initial state, the elastic member 31 pulls the adjusting block 22 close to the side wall of the plug-in hole 11. At this time, the accommodating space is relatively large. The filter rod with the special-shaped end face is inserted into the accommodating space, and the axial end face of the filter rod with the special-shaped end face is adjacent to the measuring plate and aligned with the corresponding scale. The rigid member can move toward the filter rod with the special-shaped end face against the adjusting block 22 on the side of the adjusting block 22 facing away from the accommodating space, and then fix the filter rod with the special-shaped end face together with other adjusting blocks 22 and the base block 21. At this time, the elastic member 31 is in a stretched state, and the coaxiality and pattern coincidence of the axial end face of the filter rod with the special-shaped end face are detected by the scale of the measuring plate. When the filter rod with the special-shaped end face needs to be replaced, the rigid part is retracted toward the side wall of the plug-in hole 11, and the elastic part 31 recovers its deformation, pulling the adjustment block 22 toward the side wall of the plug-in hole 11, so that the filter rod with the special-shaped end face can be withdrawn from the accommodating space.

[0042] In this way, by changing the distance between the adjusting block 22 and the side wall of the plug-in through hole 11, the size of the accommodating space is adjusted to accommodate filter rods with different thicknesses and shapes of special-shaped end faces, making the applicability of the detection device wider.

[0043] It should be noted that the filter rod with a special-shaped end surface in this embodiment is a hollow core or a coaxial core filter rod.

[0044] Optionally, the side of the plug-in through hole 11 facing away from the measuring plate in the axial direction is a plug-in interface, and the end of the adjustment block 22 adjacent to the plug-in interface forms a guide surface 201, and the filter rod with a special-shaped end face can enter the accommodating space along the guide surface 201. In this way, by providing the guide surface 201, the filter rod with a special-shaped end face can be more easily inserted into the accommodating space.

[0045] Optionally, the adjustment assembly further includes a guide column, the elastic member 31 is a spring, the elastic member 31 is sleeved on the outer peripheral side of the guide column, one axial end of the guide column is fixed to the adjustment block 22, and the other end is inserted into the inner peripheral wall of the plug-in through hole 11 and can slide relative to the housing 10. In this way, the guide rod can limit the deformation direction of the elastic member 31, and reduce the axial displacement of the adjustment block 22 along the plug-in through hole 11 when replacing the filter rod with a special-shaped end face.

[0046] Optionally, two plug-in through holes 11 are provided, and the two plug-in through holes 11 are arranged in parallel in the second direction Y. Two calibration scales arranged in mirror image are marked on the measuring plate, corresponding to the two plug-in through holes 11 respectively; the first direction X is perpendicular to the second direction Y. In this way, the two plug-in through holes 11 can be used to detect the filter rods with mirror image-arranged special-shaped end faces at both ends.

[0047] Optionally, a threaded through hole is provided on the peripheral side wall of the insertion through hole 11, and the rigid member includes a threaded rod, which is threadedly connected to the housing 10. In this way, the structure is simple and easy to operate, and the feeding amount of the threaded rod can be adjusted by screwing the threaded rod by means of the threaded connection, and the threaded connection has an anti-retraction self-locking function, which can stably support the adjustment block 22 to abut against the filter rod with a special-shaped end surface.

[0048] In other embodiments, the rigid member may be a structure such as a telescopic rod that can achieve linear feeding and locking.

[0049] Optionally, the housing 10 is provided with n threaded through holes along the first direction X, and the threaded rod includes m rigid parts, satisfying n≥m≥1.

[0050] If n>m≥1 is satisfied, the threaded rod can be inserted into an empty threaded through hole, and the supporting position of the threaded rod on the adjusting block 22 can be adjusted according to the contact position between the cushion block 20 and the filter rod with the special-shaped end face.

[0051] If n=m>1 is satisfied, it means that the adjustment block 22 can be supported by a plurality of threaded rods arranged along the first direction X, so that it can clamp the filter rod with a special-shaped end face more stably and apply a more uniform force to the filter rod with a special-shaped end face.

[0052] Furthermore, if multiple threaded rods are provided to support the same adjustment block 22, the operation is relatively cumbersome during installation, slowing down the detection progress, and it is difficult to ensure the feeding length of each threaded rod, which causes the filter rod with the special-shaped end face to be tilted, resulting in a measurement error. Therefore, the rigid member further includes two optical axes and a connecting rod, the two optical axes are symmetrically arranged on opposite sides of the threaded rod in the first direction X, the two optical axes and the threaded rod are connected by the connecting rod, and the threaded rod can rotate relative to the connecting rod, and the optical axis can penetrate the peripheral side wall of the plug-in through hole 11 and abut against the adjustment block 22. Specifically, a threaded hole is provided in the middle of the shell 10 in the first direction X, and light holes are provided at both ends, and the axis of the light hole is parallel to the axis of the threaded hole; the optical axis and the threaded rod are arranged in parallel, and the connecting rod is perpendicular to the optical axis and the threaded rod, and is connected in a mountain shape, wherein one end of the optical axis is fixedly connected to the connecting rod, and the other end can be inserted into the light hole and abut against the adjustment block 22 on the side of the adjustment block 22 facing away from the accommodating space; in this embodiment, the threaded rod includes an abutting portion and an inserting portion, and the inserting portion includes an optical axis section and a threaded section along the axial direction, the abutting portion is located on the side of the optical axis section facing away from the threaded section, and the abutting portion is located on the side of the connecting rod facing away from the shell 10, the optical axis section of the inserting portion is inserted into the connecting rod and can rotate relative to the connecting rod, and the threaded portion of the inserting portion can be inserted into the threaded hole and threadedly connected to the shell 10. In this way, as the threaded rod is turned, the abutment portion can abut against the connecting rod, thereby driving the optical axis to be inserted into the optical hole and abut against the adjustment block 22, thereby straightening the adjustment block 22, and the abutment portion can limit the optical axis from withdrawing from the optical hole. When it is necessary to release the abutment of the optical axis against the adjustment block 22, the threaded rod is rotated in the opposite direction so that the abutment portion releases the abutment against the connecting rod.

[0053] In other embodiments, a threaded hole is provided in the connecting rod, one end of the threaded rod is threadedly connected to the connecting rod, and the other end is threadedly connected to the housing 10. When in use, the optical axis is first inserted into the optical hole and abutted against the adjustment block 22, and then the threaded rod is used to connect the connecting rod and the housing 10 for locking.

[0054] Optionally, the housing 10 is provided with two slide grooves symmetrically in the third direction Z, the extension direction of the slide grooves is parallel to the second direction Y, and the measuring board can be slidably inserted in the two slide grooves; the first direction X, the second direction Y and the third direction Z are perpendicular to each other. In this way, the assembly between the measuring board and the housing 10 is completed by sliding connection, the structure is relatively simple, and it is convenient to replace the measuring board.

[0055] Optionally, a limit block is provided at one end of the slide slot, and the limit block can abut against the measuring plate along the second direction Y. Specifically, when the measuring plate slides in the slide slot along the second direction Y, when one end of the measuring plate abuts against the limit block in the second direction Y, the scale on the measuring plate faces the plug-in through hole 11, and it is considered that the assembly of the measuring plate and the housing 10 is completed.

[0056] Optionally, one adjustment block 22 is provided with a plurality of elastic members 31, and the plurality of elastic members 31 are sequentially arranged along the first direction X. In this way, by using a plurality of elastic members 31 to support the same adjustment block 22, a plurality of support points are formed in the first direction X, so that the adjustment block 22 is subjected to the same force in the first direction X, and a uniformly distributed force in the first direction X can be applied to the filter rod with the special-shaped end face.

[0057] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A detection device for detecting the coaxiality and pattern coincidence of the end face shape of a filter rod with a special-shaped end face, characterized in that: The detection device comprises: A housing (10), wherein the housing (10) is provided with an inserting through hole (11) along a first direction (X); A cushion block (20), the cushion block (20) being installed in the plug-in through hole (11), the cushion block (20) comprising a base block (21) and an adjustment block (22), the base block (21) and the adjustment block (22) being spaced apart around the axis of the plug-in through hole (11) to form an accommodating space for clamping the filter rod with the special-shaped end face, the base block (21) being fixedly connected to the housing (10), and the adjustment block (22) being spaced apart from the housing (10); an adjustment component, the adjustment component being arranged between the adjustment block (22) and the housing (10), the adjustment component comprising an elastic member (31) and a rigid member, the elastic member (31) connecting the adjustment block (22) and the housing (10) so that the adjustment block (22) always has a tendency to move away from the side where the axis of the plug-in through hole (11) is located, and the rigid member can drive the adjustment block (22) to move toward the side where the axis of the plug-in through hole (11) is located; A measuring plate is installed on one axial end face of the plug-in through hole (11), and is marked with scales and patterns for measuring the coaxiality and pattern overlap of the filter rod with the special-shaped end face.

2. The detection device according to claim 1, characterized in that: The side of the plug-in through hole (11) axially facing away from the measuring plate is a plug-in interface, and the end of the adjustment block (22) adjacent to the plug-in interface forms a guide surface (201), and the filter rod with the special-shaped end surface can enter the accommodating space along the guide surface (201).

3. The detection device according to claim 1, characterized in that: The adjustment assembly also includes a guide column, the elastic member (31) is a spring, and the elastic member (31) is sleeved on the outer peripheral side of the guide column. One axial end of the guide column is fixed to the adjustment block (22), and the other end is inserted into the inner peripheral wall of the plug-in through hole (11) and can slide relative to the housing (10).

4. The detection device according to claim 1, characterized in that: Two plug-in through holes (11) are provided, and the two plug-in through holes (11) are arranged in parallel in the second direction (Y); two correction scales arranged in a mirror image are marked on the measuring plate, respectively corresponding to the two plug-in through holes (11); and the first direction (X) is perpendicular to the second direction (Y).

5. The detection device according to claim 1, characterized in that: A threaded through hole is provided on the peripheral side wall of the plug-in through hole (11), and the rigid member comprises a threaded rod, which is threadedly connected to the housing (10).

6. The detection device according to claim 5, characterized in that: The housing (10) is provided with n threaded through holes along the first direction (X), and the threaded rod includes m rigid parts, satisfying n≥m≥1.

7. The detection device according to claim 5, characterized in that: The rigid component also includes two optical axes and a connecting rod. The two optical axes are symmetrically arranged on opposite sides of the threaded rod in the first direction (X). The two optical axes and the threaded rod are connected by the connecting rod and the threaded rod can rotate relative to the connecting rod. The optical axis can pass through the peripheral side wall of the plug-in through hole (11) and abut against the adjustment block (22).

8. The detection device according to claim 1, characterized in that: The housing (10) is provided with two slide grooves symmetrically in the third direction (Z), the extension direction of the slide grooves is parallel to the second direction (Y), and the measuring plate can be slidably inserted in the two slide grooves; The first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

9. The detection device according to claim 8, characterized in that: A limit block is disposed at one end of the slide slot, and the limit block can abut against the measuring plate along the second direction (Y).

10. The detection device according to claim 1, characterized in that: One of the adjustment blocks (22) is provided with a plurality of elastic members (31), and the plurality of elastic members (31) are arranged in sequence along the first direction (X).

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