Luggage fixing device

Abstract

The utility model discloses a luggage fixing device. The luggage fixing device comprises a first movable part, a second movable part, a linkage part, an operating part and a base, the second movable part, the first movable part and the linkage part are all arranged on the base, the operation part is connected with the linkage part, and at least parts of the first movable part and the second movable part are located at the bottom of the base. The linkage piece drives the first movable piece to move close to or away from the second movable piece when a user operates the operation piece. Therefore, after the luggage fixing device with the luggage is placed on the goods shelf and the first movable part and the second movable part which protrude out of the bottom of the base penetrate through the goods shelf, the first movable part and the second movable part can clamp the goods shelf or apply outward acting force to the goods shelf by operating the operating part, so that the luggage is mounted on the goods shelf, and the mounting mode is simple to operate and high in practicability. And moreover, by means of the relative movement between the first movable part and the second movable part, the goods shelf fixing device can be suitable for goods shelves of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of bag fixing, in particular to a bag fixing device. Background Art

[0002] In the past, most of the bags on the rear seat rack of bicycles were fixed with straps, but this method is inconvenient for subsequent users to take the items. For this reason, the cargo boxes installed on the rear seats of bicycles currently on the market are generally fixed with two iron sheets in combination with screws and nuts. Specifically, one iron sheet is located inside the cargo box, and the other iron sheet is located at the bottom of the rear seat rack. Then, the screws are passed from the inside of the cargo box through one iron sheet, the bottom of the cargo box, the shelf, and the other iron sheet, and then tightened with nuts to fix the cargo box. However, this cargo box fixing method is cumbersome to operate and requires a screwdriver. The installation is time-consuming and labor-intensive, and cannot meet the needs of users. Utility Model Content

[0003] The main purpose of the utility model is to provide a bag fixing device, which is used to solve the problem of complicated operation of installing bags on the rear seat of the existing bicycle.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0005] A bag fixing device comprises a first movable member, a second movable member, a linkage member, an operating member and a base for fixing on the bag;

[0006] The second movable member is arranged on the base, the first movable member and the linkage member are both movably arranged on the base, the operating member is connected to the linkage member, and the first movable member and the second movable member are at least partially located at the bottom of the base;

[0007] When the user operates the operating member, the linkage member drives the first movable member to move in a direction close to the second movable member or in a direction away from the second movable member, so that the first movable member and the second movable member clamp the shelf or the first movable member and the second movable member press the shelf with a reverse force.

[0008] Furthermore, the second movable member is movably arranged on the base, and the second movable member is connected to the linkage member;

[0009] When the user operates the operating member, the linkage member also drives the second movable member to move in a direction approaching the first movable member or in a direction away from the first movable member.

[0010] Furthermore, the linkage member is a shaft rod, the shaft rod passes through the first movable member and the second movable member, the first movable member is connected to the shaft rod by a thread, and the second movable member is connected to the shaft rod by a thread;

[0011] The linkage member rotates when the user operates the operating member to drive the first movable member and the second movable member to move toward or in opposite directions.

[0012] Furthermore, the shaft rod is provided with a first section of thread and a second section of thread, the first movable part is provided with a first hole, a first nut is provided in the first hole, the second movable part is provided with a second hole, a second nut is provided in the second hole; the shaft rod passes through the first hole and the second hole, the first nut and the second nut are sleeved on the outer side wall of the shaft rod, the thread on the first nut is adapted to the first section of thread, and the nut on the second nut is adapted to the second section of thread; the first section of thread and the second section of thread are respectively positive thread and negative thread.

[0013] Furthermore, an active cavity is provided in the base, and a first limiting hole and a second limiting hole communicating with the active cavity are provided at the bottom of the base;

[0014] The first movable member includes a first movable block and a first clamping member arranged below the first movable block, and the second movable member includes a second movable block and a second clamping member arranged below the second movable block; the first movable block and the second movable block are both located in the movable cavity, the first clamping member passes through the first limiting hole, and the second clamping member passes through the second limiting hole.

[0015] Furthermore, the first pressing member and the second pressing member are both provided with pressing openings for use with the shelf, and the pressing openings are provided with rubber pads for increasing friction.

[0016] Further, the operating member is located on the outer side of the base; the operating member is provided with a first groove on a side away from the first movable member, a through hole penetrating the operating member is provided at the bottom of the first groove, and the operating member is provided with a card slot on the peripheral side of the through hole, and the card slot is located on a side of the through hole away from the first groove;

[0017] A ratchet is provided on the outer wall of the shaft rod near the end, and a latch tooth is provided on the ratchet. One end of the shaft rod is placed in the first groove after passing through the through hole. A limiting piece is provided at one end of the shaft rod near the first groove. The outer contour of the limiting piece is larger than the outer contour of the through hole, and the outer contour of the limiting piece is smaller than the outer contour of the first groove. An elastic piece is provided between the limiting piece and the bottom surface of the first groove, and the latch tooth is placed in the slot.

[0018] Furthermore, the shaft rod is provided with a second groove at one end away from the operating member for use with an external tool.

[0019] Furthermore, a plurality of bearings are arranged on the outer wall of the shaft rod at positions avoiding the first movable member and the second movable member, and a cavity adapted for the bearings is provided in the base;

[0020] The number of the bearings is two, one of the bearings is located on a side of the first movable member away from the second movable member, and the other of the bearings is located on a side of the second movable member away from the first movable member.

[0021] Furthermore, the base includes a surface shell and a bottom shell connected to the surface shell to form an active cavity;

[0022] At least one guide hole is formed on each of the first movable member and the second movable member, and a guide column adapted for use with the guide hole is provided on the movable cavity, the guide column is placed in the guide hole, and the guide column is provided on the bottom shell and / or the surface shell;

[0023] A limiting protrusion is arranged in the middle of the movable cavity, and the first movable member and the second movable member are located on both sides of the limiting protrusion.

[0024] The utility model has the following beneficial effects: compared with the prior art, the utility model is configured with a base fixedly connected to the bag, and an operating member, a linkage member, a first movable member, and a second movable member are configured on the base, so that when the user operates the operating member, the linkage member can drive the first movable member to approach the second movable member or move away from the second movable member. Thus, the bag fixing device is placed on a shelf, and after the first movable member and the second movable member protruding from the bottom of the base pass through the shelf, the operating member can be operated to move the first movable member closer to or away from the second movable member, so that the first movable member and the second movable member can clamp the shelf or give the shelf an outward force, thereby fixing the base on the shelf. The installation method of this bag is simple to operate, saves time and effort, and does not require the use of tools. In addition, the relative movement between the first movable member and the second movable member can be used to adapt to shelves of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the utility model used with bags but disassembled from the shelf;

[0027] Figure 2 This is a schematic diagram of the utility model being fixed on a shelf with luggage;

[0028] Figure 3 It is a three-dimensional diagram of the utility model;

[0029] Figure 4A three-dimensional diagram of another viewing angle of the present invention;

[0030] Figure 5 It is an exploded view of the utility model;

[0031] Figure 6 This is a schematic diagram of the utility model with the face shell removed;

[0032] Figure 7 This is a schematic diagram of another viewing angle of the utility model with the cover removed;

[0033] Figure 8 This is an exploded view of the operating member, ratchet, elastic member, and limiting member of the utility model;

[0034] Fig. 9 This is an exploded view of the operating member, ratchet, elastic member, and limiting member of the utility model from another perspective;

[0035] Fig.10 It is a cross-sectional view of the operating member, ratchet, elastic member, limit member and shaft along the central axis of the shaft of the utility model. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See attached Figure 1-10 , a luggage fixing device in an embodiment of the utility model.

[0038] The bag fixing device comprises a first movable member 3, a second movable member 4, a linkage member 5, an operating member 2, and a base 1 for fixing on a bag 50. The second movable member 4 is arranged on the base 1, the first movable member 3 and the linkage member 5 are both movably arranged on the base 1, the operating member 2 is connected to the linkage member 5, and the first movable member 3 and the second movable member 4 are at least partially located at the bottom of the base 1. When the user operates the operating member 2, the linkage member 5 drives the first movable member 3 to move in a direction close to the second movable member 4 or in a direction away from the second movable member 4, so that the first movable member 3 and the second movable member 4 clamp the shelf 00 or the first movable member 3 and the second movable member 4 press the shelf 00 by a reverse force.

[0039] The utility model is configured with a base 1 fixedly connected with a bag 50, and an operating member 2, a linkage member 5, a first movable member 3, and a second movable member 4 are configured on the base 1, so that when a user operates the operating member 2, the linkage member 5 can drive the first movable member 3 to approach the second movable member 4 or move away from the second movable member 4. Thus, the bag fixing device with the bag is placed on the shelf 00, and after the first movable member 3 and the second movable member 4 protruding from the bottom of the base 1 pass through the shelf 00, the operating member 2 can be operated to move the first movable member 3 to approach or move away from the second movable member 4, so that the first movable member 3 and the second movable member 4 can clamp the shelf 00 or give the shelf 00 an outward force, thereby fixing the base 1 on the shelf 00, so that the bag 50 is installed on the shelf 00. This installation method is simple to operate, saves time and effort, and does not require the use of tools. It utilizes the relative movement between the first movable member 3 and the second movable member 4, and can be adapted to shelves 00 of different sizes.

[0040] Specifically, the base 1 can be fixedly connected to the bag 50 by means of screws. Of course, it can also be fixed to the bag 50 by means of buckles, straps, adhesion, etc. The bag fixing device of this embodiment can be adapted for use on shelves such as bicycles, electric vehicles, and motorcycles.

[0041] In one embodiment, the second movable member 4 is immovably fixed on the base 1 .

[0042] In one embodiment, the second movable member 4 is movably disposed on the base 1, and the second movable member 4 is connected to the linkage member 5. When the user operates the operating member 2, the linkage member 5 also drives the second movable member 4 to move in a direction close to the first movable member 3 or in a direction away from the first movable member 3. The first movable member 3 and the second movable member 4 are both movable, and the distance between the first movable member 3 and the second movable member 4 can be increased to adapt to the use of a larger size of the shelf 00, and the first movable member 3 and the second movable member 4 can more quickly apply a force to the shelf 00, so that the bag 50 fixing device of this embodiment can be fixed on the shelf 00 more quickly.

[0043] In one embodiment, the linkage member 5 is a shaft rod, which passes through the first movable member 3 and the second movable member 4. The first movable member 3 is connected to the shaft rod by a thread, and the second movable member 4 is connected to the shaft rod by a thread. Therefore, when the user rotates the operating member 2, the linkage member 5 can be driven to rotate, so that the first movable member 3 and the second movable member 4 move toward or in the opposite direction, so that when used in conjunction with the shelf 00, a force can be applied to the shelf 00, and the luggage fixing device of this embodiment can be fixed on the shelf 00. In addition, the structure is simple and convenient for production and manufacturing.

[0044] Specifically, the shaft is provided with a first thread (not shown in the figure) and a second thread (not shown in the figure), the first movable member 3 is provided with a first hole 33, the second movable member 4 is provided with a second hole 44, the shaft passes through the first hole 33 and the second hole 44, and the shaft is provided with a thread adapted for use, the first thread and the second thread are respectively positive and negative threads. Thus, when the shaft rotates, the first movable member 3 and the second movable member 4 can be driven to move toward or in the opposite direction.

[0045] In one embodiment, a first nut 31 is provided in the first hole 33, and a second nut 43 is provided in the second hole 44, that is, the first nut 31 is embedded in the first movable part 3, and the second nut 43 is embedded in the second movable part 4. The first nut 31 and the second nut 43 are sleeved on the outer wall of the shaft, and the thread on the first nut 31 is adapted to the first section of the thread, and the nut on the second nut 43 is adapted to the second section of the thread. In this way, it is prevented from directly setting the thread on the first movable part 3 and the second movable part 4. Since, when the first movable part 3 and the second movable part 4 are made of plastic material, the thread is easy to wear or deform. The shaft is connected to the first movable part 3 and the second movable part 4 respectively by using the first nut 31 and the second nut 43, which can improve the service life of the product. Specifically, the first nut 31 and the second nut 43 can be nuts made of metal materials such as copper and steel.

[0046] In other embodiments, the first movable member 3 and the second movable member 4 may not be provided with the first nut 31 and the second nut 43, and the first movable member 3 and the second movable member 4 may be driven to move toward or in opposite directions when the shaft rotates.

[0047] In other embodiments, the linkage member 5 can also be two shaft rods, and the number of the operating members 2 is also two, that is, the first movable member 3 and the second movable member 4 are each configured with a shaft rod and an operating member 2, so that the first movable member 3 and the second movable member 4 can move independently, and the distance between the first movable member 3 and the second movable member 4 can also be achieved to be closer or farther.

[0048] In other embodiments, the operating part 2 can be a motor, a cylinder, and the linkage part 5 can be a belt drive, a connecting rod, a gear or a rack, etc., so that the distance between the first movable part 3 and the second movable part 4 can be closer or farther, etc. Here, the structure of the operating part 2 and the linkage part 5 is not limited.

[0049] In one embodiment, an active cavity 13 is provided in the base 1, and a first limiting hole 16 and a second limiting hole 14 communicating with the active cavity 13 are provided at the bottom of the base 1. The first movable member 3 includes a first movable block 30 and a first clamping member 32 provided below the first movable block 30, and the second movable member 4 includes a second movable block 40 and a second clamping member 42 provided below the second movable block 40. The first movable block 30 and the second movable block 40 are both located in the active cavity 13, the first clamping member 32 passes through the first limiting hole 16, and the second clamping member 42 passes through the second limiting hole 14. The active cavity 13 is used to limit the first movable member 3 and the second movable member 4, so that the first movable member 3 and the second movable member 4 can move stably. The active cavity 13 and the first limiting hole 16 can be used to limit the movement stroke of the first movable member 3, and the active cavity 13 and the second limiting hole 14 can be used to limit the movement of the second movable member 4.

[0050] In one embodiment, the first pressing member 32 and the second pressing member 42 are both provided with a pressing opening 10 for use with the shelf 00. By using the side wall of the pressing opening 10, the luggage fixing device of this embodiment can be stably installed on the shelf 00 by the interaction force between the first movable member 3 and the second movable member 4, so as to prevent the luggage fixing device from being separated from the shelf 00 when the user or others lift or push the luggage 50 with force. Specifically, the cross-section of the pressing opening 10 can be V-shaped, U-shaped, etc.

[0051] In one embodiment, in order to increase the friction between the first pressing member 32, the second pressing member 42 and the shelf 00, a rubber pad 20 is provided on the pressing port 10. The rubber pad 20 can increase the friction between the first pressing member 32, the second pressing member 42 and the shelf 00, so that the bag fixing device can be stably fixed on the shelf 00 to prevent slipping and shaking. The rubber pad 20 can also play a buffering role, effectively reducing the scratching between the shelf 00 and the first pressing member 32, the second pressing member 42, and preventing scratches.

[0052] In the above embodiment, the operating member 2 is located outside the base 1 for easy operation by the user.

[0053] In one embodiment, the operating member 2 is provided with a first groove 21 on a side away from the first movable member 3, a through hole 24 penetrating the operating member 2 is provided at the bottom of the first groove 21, and a clamping groove 25 is provided on the peripheral side of the through hole 24 of the operating member 2, and the clamping groove 25 is located on the side of the through hole 24 away from the first groove 21. A ratchet 51 is provided on the outer wall of the shaft near the end, and a clamping tooth 54 is provided on the ratchet 51. One end of the shaft passes through the through hole 24 and is placed in the first groove 21. A limiting member 23 is provided at one end of the shaft near the first groove 21, and the outer contour of the limiting member 23 is larger than the outer contour of the through hole 24, and the outer contour of the limiting member 23 is smaller than the outer contour of the first groove 21. An elastic member 22 is provided between the limiting member 23 and the bottom surface of the first groove 21, and the clamping tooth 54 is placed in the clamping groove 25. In this way, after the first movable part 3 and the second movable part 4 press the shelf 00, when the user continues to rotate the operating part 2, the elastic part 22 is compressed, so that the protruding part of the latch tooth 54 leaves the latch groove 25, and the operating part 2 rotates and moves in a direction away from the shaft rod, which plays a role in protecting the operating part 2 and preventing the operating part 2 from being damaged by continuously turning the operating part 2 with force after the first movable part 3 and the second movable part 4 press the shelf 00. Of course, if the user needs to tighten it a little, the operating part 2 can be pressed and then rotated to prevent the operating part 2 from idling due to the pressure of the elastic part 22. Specifically, the elastic part 22 can be a spring or a spring sheet. The latch tooth 54 can be arranged in a circumferential shape, and the cross section can be in a wave shape, a triangle, a trapezoid, etc. The limiter 23 can be locked on the shaft rod by screws, or fixed on the shaft rod by bonding, interference fit, etc.

[0054] In an embodiment of a shaft, a second groove 53 adapted to be used with an external tool is provided at one end of the shaft away from the operating member 2, and a relief hole (not shown in the figure) is provided at the position corresponding to the second groove 53 on the base 1 to display the second groove 53. By using the second groove 53, after the operating member 2 is damaged, the user can use a tool to fit the second groove 53, and when the tool rotates, the shaft is driven to rotate, and the first movable member 3 and the second movable member 4 can also be moved closer or farther away.

[0055] Specifically, the second groove 53 can be a notch from the outer wall. Alternatively, the second groove 53 can be in a straight shape to fit a straight screwdriver; or the second groove 53 can be in a cross shape to fit a cross screwdriver; or the second groove 53 can be in a hexagonal shape to fit a hexagonal screwdriver. Of course, in other embodiments, the second groove 53 can also be in other polygonal or irregular shapes.

[0056] In one embodiment, the outer wall of the shaft is provided with a plurality of bearings 52 at a position avoiding the first movable member 3 and the second movable member 4, and a cavity (not shown in the figure) adapted to the bearings 52 is provided in the base 1 to allow the shaft to rotate more smoothly. Specifically, in this embodiment, the number of bearings 52 may be two, one bearing 52 is located on the side of the first movable member 3 away from the second movable member 4, and the other bearing 52 is located on the side of the second movable member 4 away from the first movable member 3. Of course, in other embodiments, the number of bearings 52 may also be one, three, etc., and the number of bearings 52 is not limited here.

[0057] In the above embodiment, the base 1 includes a surface shell 11 and a bottom shell 12 connected to the surface shell 11 to form an active cavity 13. Specifically, the bottom shell 12 and the surface shell 11 can be connected by screws, buckles, ultrasonic pressing, etc., and the first limiting hole 16 and the second limiting hole 14 are both located on the bottom shell 12.

[0058] In one embodiment, in order to allow the first movable member 3 and the second movable member 4 to move stably, at least one guide hole 41 is opened on the first movable member 3 and the second movable member 4, and a guide column 16 adapted for use with the guide hole 41 is provided on the movable cavity 13. The guide column 16 is placed in the guide hole 41, and the guide column 16 is set on the bottom shell 12 and / or the surface shell 11.

[0059] In one embodiment, in order to limit the movement stroke of the first movable member 3 and the second movable member 4 , a limiting protrusion 15 is provided in the middle of the movable cavity 13 , and the first movable member 3 and the second movable member 4 are located on both sides of the limiting protrusion 15 .

[0060] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0062] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A bag fixing device, characterized in that: It includes a first movable part, a second movable part, a linkage part, an operating part and a base for fixing on the bag; The second movable member is arranged on the base, the first movable member and the linkage member are both movably arranged on the base, the operating member is connected to the linkage member, and the first movable member and the second movable member are at least partially located at the bottom of the base; When the user operates the operating member, the linkage member drives the first movable member to move in a direction close to the second movable member or in a direction away from the second movable member, so that the first movable member and the second movable member clamp the shelf or the first movable member and the second movable member press the shelf with a reverse force.

2. The bag fixing device according to claim 1, characterized in that: The second movable member is movably arranged on the base, and the second movable member is connected to the linkage member; When the user operates the operating member, the linkage member also drives the second movable member to move in a direction approaching the first movable member or in a direction away from the first movable member.

3. The bag fixing device according to claim 2, characterized in that: The linkage member is a shaft rod, the shaft rod passes through the first movable member and the second movable member, the first movable member is connected to the shaft rod by a thread, and the second movable member is connected to the shaft rod by a thread; The linkage member rotates when the user operates the operating member to drive the first movable member and the second movable member to move toward or in opposite directions.

4. The bag fixing device according to claim 3, characterized in that: The shaft rod is provided with a first section of thread and a second section of thread, the first movable part is provided with a first hole, a first nut is provided in the first hole, the second movable part is provided with a second hole, a second nut is provided in the second hole; the shaft rod passes through the first hole and the second hole, the first nut and the second nut are sleeved on the outer side wall of the shaft rod, the thread on the first nut is adapted to the first section of thread, and the nut on the second nut is adapted to the second section of thread; the first section of thread and the second section of thread are respectively positive thread and negative thread.

5. The bag fixing device according to claim 3, characterized in that: An active cavity is arranged in the base, and a first limiting hole and a second limiting hole communicating with the active cavity are opened at the bottom of the base; The first movable member includes a first movable block and a first clamping member arranged below the first movable block, and the second movable member includes a second movable block and a second clamping member arranged below the second movable block; the first movable block and the second movable block are both located in the movable cavity, the first clamping member passes through the first limiting hole, and the second clamping member passes through the second limiting hole.

6. The bag fixing device according to claim 5, characterized in that: The first pressing member and the second pressing member are both provided with a pressing opening for use with the shelf, and the pressing opening is provided with a rubber pad for increasing friction.

7. The bag fixing device according to any one of claims 3 to 6, characterized in that: The operating member is located on the outer side of the base; the operating member is provided with a first groove on a side away from the first movable member, a through hole penetrating the operating member is provided at the bottom of the first groove, and the operating member is provided with a card slot on the peripheral side of the through hole, and the card slot is located on the side of the through hole away from the first groove; A ratchet is provided on the outer wall of the shaft rod near the end, and a latch tooth is provided on the ratchet. One end of the shaft rod is placed in the first groove after passing through the through hole. A limiting piece is provided at one end of the shaft rod near the first groove. The outer contour of the limiting piece is larger than the outer contour of the through hole, and the outer contour of the limiting piece is smaller than the outer contour of the first groove. An elastic piece is provided between the limiting piece and the bottom surface of the first groove, and the latch tooth is placed in the slot.

8. The bag fixing device according to claim 3, characterized in that: The shaft rod is provided with a second groove adapted for use with an external tool at one end away from the operating member.

9. The bag fixing device according to claim 5, characterized in that: The outer wall of the shaft rod is provided with a plurality of bearings at positions avoiding the first movable member and the second movable member, and the base is provided with a cavity adapted to the bearings; The number of the bearings is two, one of the bearings is located on a side of the first movable member away from the second movable member, and the other of the bearings is located on a side of the second movable member away from the first movable member.

10. The bag fixing device according to claim 5, characterized in that: The base comprises a surface shell and a bottom shell connected to the surface shell to form an activity cavity; At least one guide hole is formed on each of the first movable member and the second movable member, and a guide column adapted for use with the guide hole is provided on the movable cavity, the guide column is placed in the guide hole, and the guide column is provided on the bottom shell and / or the surface shell; A limiting protrusion is arranged in the middle of the movable cavity, and the first movable member and the second movable member are located on both sides of the limiting protrusion.

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