Spring bolt assembly and pull ring positioning structure for box body

Abstract

The utility model relates to the field of lock tongues, aims to solve the problem of poorer fixing effect of a clasp nail in the prior art, and provides a lock tongue assembly for a box body, which comprises a first elastic piece, a lock tongue and a pull ring, the spring bolt is connected with the first elastic piece, and the end, away from the first elastic piece, of the spring bolt at least comprises a first cambered surface wall and a second cambered surface wall. The pull ring comprises a base and a clamping cylinder; the clamping cylinder is used for inserting the spring bolt, the clamping cylinder is connected with the bottom wall of the base, the inner wall of the clamping cylinder is provided with inclined walls corresponding to the first cambered surface wall and the second cambered surface wall respectively, and the outer side wall of the end, away from the base, of the clamping cylinder is provided with a baffle ring. According to the utility model, the lock tongue pops up and enters the clamping cylinder, so that the box cover can be fixed and limited; the first cambered surface wall and the second cambered surface wall are arranged on the spring bolt, the clamping barrel is provided with the inclined wall, when the box cover is lifted upwards, the inclined wall extrudes the cambered surface walls, the spring bolt is subjected to component force away from the clamping barrel, the spring is compressed, and then the box cover is taken down.

Description

Technical Field

[0001] The utility model relates to the field of lock tongues, and more specifically, to a lock tongue assembly for a box body and a pull ring positioning structure. Background Art

[0002] The anti-counterfeiting of packaging boxes is one of the safeguards for the interests of both buyers and sellers. Currently, one of the anti-counterfeiting methods for packaging boxes lies in the opening structure of the packaging box, such that the opening of the packaging box requires destroying some irreparable structures, thereby determining whether the packaging box has been prematurely opened by whether a specific structure has been damaged.

[0003] The patent with the publication number CN109866971A discloses a rotary snap fastener, which improves the opening method from the traditional outward pulling of the snap fastener to rotary opening, avoiding the disadvantages such as the generation of burrs on the packaging, the uneven edges of the packaging lock holes affecting the aesthetics of the packaging, and being prone to cutting the user and affecting the user experience. However, after the snap fastener is assembled, there is a certain degree of mobility between the box cover and the base, and the fixing effect is poor. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a lock tongue assembly for a box body to solve the problem of poor fixing effect of the snap fastener in the prior art.

[0005] Another purpose of the present embodiment of the utility model is to provide a pull ring positioning structure to achieve the locking and unlocking of the lock tongue.

[0006] The embodiments of the present utility model are achieved through the following technical solutions:

[0007] A lock tongue assembly for a box body includes: a first elastic member, a lock tongue, and a pull ring; the lock tongue is connected to the first elastic member, and one end of the lock tongue away from the first elastic member at least includes a first arc-shaped wall and a second arc-shaped wall, the first arc-shaped wall and the second arc-shaped wall are opposite in the width direction of the lock tongue, and during the process of extending away from the first elastic member, the first arc-shaped wall and the second arc-shaped wall gradually converge inward; the pull ring includes: a base and a cartridge; the cartridge is for the lock tongue to be inserted, the cartridge is connected to the bottom wall of the base, and the inner wall of the cartridge is provided with inclined walls corresponding to the first arc-shaped wall and the second arc-shaped wall respectively, and a retaining ring is provided on the outer side wall of one end of the cartridge away from the base.

[0008] Preferably, a card slot is provided on the side wall of one end of the lock tongue away from the spring, and at least a part of the slot opening of the card slot faces downward; when the pull ring is assembled on the box cover and the box cover and the base are in contact, the maximum distance between the inner wall of the cartridge and the side wall of one end of the lock tongue away from the first elastic member is greater than the depth of the card slot.

[0009] Preferably, at least one inclined wall and one horizontal wall are included on the side wall of the lock tongue. The horizontal wall is connected to one end of the inclined wall away from the cartridge. One end of the inclined wall close to the horizontal wall is higher than the other end of the inclined wall. A horizontal portion matching with the horizontal wall is provided on the inner wall of the cartridge.

[0010] Preferably, the pull ring further includes: a clamping piece. The bottom wall of the base is connected to the clamping piece. The clamping piece is provided with a hook with a free end facing the cartridge.

[0011] Preferably, a contact wall for abutting against the outer side wall of the box cover is left between the side wall of the base and the clamping piece.

[0012] A pull ring positioning structure includes: the lock tongue assembly for the box body, a vertical clamping plate and a horizontal plate. The vertical clamping plate is used for inserting into the card slot. One end of the horizontal plate is connected to the bottom end of the vertical plate. The top wall of the other end of the horizontal plate is used for abutting against the box cover. The horizontal plate is used for connecting to the base.

[0013] Preferably, the horizontal plate is connected to the base through a second elastic member.

[0014] Preferably, it includes: a base and a box cover. The base is provided with a cavity. The second elastic member, the vertical clamping plate and the horizontal plate are accommodated in the cavity. The base is provided with an opening. At least a part of the positive projection of the opening towards the horizontal plate falls on the horizontal plate. An insertion plate matching with the opening is provided on the bottom wall of the box cover.

[0015] Preferably, the box cover is provided with a through hole for the cartridge to pass through and an annular hole for the clamping piece to pass through. The through hole is located in the enclosed space of the annular hole.

[0016] Preferably, one wall of the hook facing the cartridge is a first side wall. The first side wall is inclined. The annular hole is provided with a second side wall matching with the first side wall.

[0017] The utility model has at least the following beneficial effects:

[0018] On the basis of the original pull ring, the utility model is provided with a cartridge, and then a lock tongue matching with the cartridge is provided. When the pull ring is assembled to the box cover and then the box cover and the base are assembled, the lock tongue pops out and enters the cartridge, so as to realize the fixation and limitation of the box cover. Since the box cover finally needs to be opened, in order to prevent the lock tongue from completely jamming the cartridge when the box cover is lifted, a first arc wall and a second arc wall are provided on the lock tongue, and an inclined wall is provided on the cartridge. When the box cover is lifted, the inclined wall presses the arc wall, and the lock tongue receives a component force in the direction away from the cartridge, and the spring is compressed, and then the box cover is removed. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the locking tongue assembly for the box body;

[0021] Figure 2 is Figure 1 a cross-sectional view of;

[0022] Figure 3 It is a cross-sectional view after the locking tongue assembly is assembled with the box body;

[0023] Figure 4 is Figure 3 a detailed view of part A in;

[0024] Icon: 1 - First elastic member, 2 - Locking tongue, 21 - First arc-shaped wall, 22 - Second arc-shaped wall, 23 - Card slot, 24 - Inclined wall, 25 - Horizontal wall, 3 - Pull ring, 31 - Base, 311 - Abutting wall, 32 - Cartridge, 321 - Inclined wall, 322 - Retaining ring, 33 - Clamping piece, 331 - Hook, 3311 - First side wall, 4 - Vertical clamping plate, 5 - Cross plate, 6 - Second elastic member, 7 - Base, 71 - Opening, 8 - Box cover, 81 - Insertion plate, 82 - Through hole, 83 - Annular hole, 831 - Second side wall. Specific embodiments

[0025] To make the purpose, method solutions and advantages of the embodiments of the present utility model clearer, the method solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] The anti-counterfeiting of the packaging box is one of the safeguards for the interests of both buyers and sellers. Currently, one of the anti-counterfeiting methods for the packaging box lies in the opening structure of the packaging box, such that the opening of the packaging box requires destroying some irreparable structures, thereby judging whether the packaging box has been opened in advance based on whether the specific structure has been damaged.

[0027] The applicant applied for a patent with the publication number CN109866971A and the patent name "A Rotary Button" on December 4, 2017. It improved the old-fashioned button that needed to be pulled outwards to be opened by rotation, avoiding the drawbacks such as the generation of burrs in the packaging, the uneven edges of the packaging lock holes, which affected the beauty of the packaging and were prone to cut the user, affecting the trial experience. However, after the button is assembled, there is a certain degree of mobility between the box cover and the base, and the fixing effect is poor. Therefore, the applicant considered further strengthening the assembly limit effect between the box cover and the base through the tongue structure. However, the purpose of the conventional tongue structure is to completely lock, making the locked object completely unable to be opened, while the box cover of the packaging box still needs to be opened eventually. Therefore, the tongue structure of the present utility model cannot be exactly the same as the existing tongue structure. While meeting certain fixing and limiting requirements, it also needs to meet a certain force. During the process of lifting the box cover, the tongue can automatically give way and withdraw from the barrel. Thus, the applicant conceived the technical solution provided in the following embodiments.

[0028] Embodiment 1

[0029] As Figure 1-2 shown, a tongue 2 assembly for a box body includes: a first elastic member 1, a tongue 2, and a pull ring 3; the tongue 2 is connected to the first elastic member 1, and at least a first arc-shaped wall 21 and a second arc-shaped wall 22 are included at one end of the tongue 2 away from the first elastic member 1. The first arc-shaped wall 21 and the second arc-shaped wall 22 are opposite in the width direction of the tongue 2. During the process of extending away from the first elastic member 1, the first arc-shaped wall 21 and the second arc-shaped wall 22 gradually converge inward; the pull ring 3 includes: a base 31 and a barrel 32; the barrel 32 is for the tongue 2 to be inserted, the barrel 32 is connected to the bottom wall of the base 31, and inclined walls 321 corresponding to the first arc-shaped wall 21 and the second arc-shaped wall 22 are provided on the inner wall of the barrel 32, and a retaining ring 322 is provided on the outer side wall of one end of the barrel 32 away from the base 31.

[0030] In the specific implementation process, the first elastic member 1 can adopt a spring. Figure 1 And Figure 2 show the installation area of the tongue 2, which is not within the protection scope of this embodiment. The installation of the tongue 2 can be adjusted according to the actual situation, and this embodiment does not make specific limitations. Figure 1 And Figure 2 are only exemplary implementation manners. The retaining ring 322 can prevent the pull ring 3 from disengaging from the box body. The first arc-shaped wall 21 and the second arc-shaped wall 22 can be only on the upper and lower sides as shown in Figure 2 shown, or can be an annular arc-shaped wall, that is, the first arc-shaped wall 21 and the second arc-shaped wall 22 are a continuous arc-shaped wall. Of course, the first arc-shaped wall 21 and the second arc-shaped wall 22 can also form a spherical wall together with the wall surface of one end of the tongue 2 away from the first elastic member 1.

[0031] Before the lid 8 and the base 7 are assembled, the first elastic member 1 is in a compressed state. During the assembly process of the lid 8 and the base 7, the first elastic member 1 pops out and enters the cartridge 32. The pull tab 3 is restricted from moving up and down by the locking tongue 2, and thus the up and down movement of the lid 8 is restricted, making the assembly of the lid 8 and the base 7 more stable. When the lid 8 needs to be removed, lift the lid 8 upwards, driving the inclined wall 321 on the cartridge 32 to squeeze the arc-shaped wall. As a result, the locking tongue 2 receives a component force away from the cartridge 32, that is, taking Figure 2 as the reference, the locking tongue 2 receives a force to the right, the locking tongue 2 retreats from the cartridge 32, and the lid 8 can be removed.

[0032] Embodiment 2

[0033] In order to enable the locking tongue 2 to smoothly enter the cartridge 32 during the assembly of the lid 8 and the base 7, improvements are made on the basis of Embodiment 1. As Figure 2 shown, in this embodiment, a card slot 23 is provided on the side wall of the end of the locking tongue 2 away from the spring, and at least a part of the slot opening of the card slot 23 faces downwards; when the pull tab 3 is assembled on the lid 8 and the lid 8 and the base 7 are in contact, the maximum distance between the inner wall of the cartridge 32 and the side wall of the end of the locking tongue 2 away from the first elastic member 1 is greater than the depth of the card slot 23. Since the side wall of the end of the locking tongue 2 away from the first elastic member 1 is an arc-shaped wall, by taking the maximum distance between the arc-shaped wall and the inner wall of the barrel opening as the limit, the locking tongue 2 can enter the cartridge 32.

[0034] During the specific implementation process, the card slot 23 on the locking tongue 2 is used to lock the position of the locking tongue 2 before the lid 8 is assembled, and the first elastic member 1 is in a compressed state during locking. During the process of the lid 8 covering the base 7, the locking is released and the locking tongue 2 enters the cartridge 32. Since the lid 8 is constantly moving, in order for the locking tongue 2 to smoothly enter the cartridge 32, as Figure 2 shown, the width of the barrel opening of the cartridge 32 needs to be greater than the free end of the locking tongue 2, so that even if there is a certain deviation in the position between the locking tongue 2 and the cartridge 32, it can still smoothly enter. At the same time, the inner barrel width of the cartridge 32 away from the locking tongue 2 can be the same as the maximum width of the locking tongue 2 to reduce the degree of freedom of up and down movement of the cartridge 32 after assembly. The depth of the card slot 23 is the distance that the pull tab 3 needs to move down when the positioning of the locking tongue 2 is released. At this downward movement distance, the locking tongue 2 still needs to face the barrel opening of the cartridge 32. Therefore, in this embodiment, the distance between the upper inner wall of the barrel opening and the upper side wall of the locking tongue 2 is limited. At least a part of the slot opening faces downwards, which means that as Figure 4 shown, it is in the opposite direction to the opening direction of the lid 8.

[0035] Embodiment 3

[0036] In order to reduce the relative displacement between the cartridge 32 and the locking tongue 2, improvements are made on the basis of Embodiment 2. AsFigure 2 As shown, in this embodiment, the side wall of the locking tongue 2 at least includes an inclined wall 24 and a horizontal wall 25. The horizontal wall 25 is connected to one end of the inclined wall 24 away from the cartridge 32. One end of the inclined wall 24 close to the horizontal wall 25 is higher than the other end of the inclined wall 24. The inner wall of the cartridge 32 is provided with a horizontal portion that cooperates with the horizontal wall 25.

[0037] During the specific implementation process, Figure 2 The horizontal portion is not shown in the figure. The horizontal portion means that the inner hole of the cartridge 32 is horizontal and the aperture remains unchanged. In this embodiment, due to the arrangement of the inclined wall 24 and the horizontal wall 25 of the locking tongue 2, the front end of the locking tongue 2 is smaller than the rear end. When it is convenient for the front end to enter the cartridge 32, the outer wall of the larger-diameter rear end can be abutted against the inner wall of the horizontal portion of the cartridge 32 to limit the up-and-down movement of the locking tongue 2 with respect to the cartridge 32. Furthermore, after the lid 8 and the base 7 are assembled, the distance by which they can displace relative to each other is almost zero.

[0038] Embodiment 4

[0039] In order to further increase the stability of the pull ring 3 after being assembled with the lid 8 and retain its anti-counterfeiting function, improvements are made on the basis of Embodiments 1-3. As Figure 1 shown, in this embodiment, the pull ring 3 further includes: a clamping piece 33. The bottom wall of the base 31 is connected to the clamping piece 33. The clamping piece 33 is provided with a hook 331 whose free end faces the cartridge 32.

[0040] During the specific implementation process, as Figure 4 shown, the assembly stability of the pull ring 3 on the lid 8 can be improved by engaging the hook 331 with the inner wall of the lid 8.

[0041] Embodiment 5

[0042] In order to further close the assembly hole on the lid 8 for installing the pull ring 3, as Figure 2 and Figure 4 shown, in this embodiment, a contact wall 311 for abutting against the outer side wall of the lid 8 is left between the side wall of the base 31 and the clamping piece 33.

[0043] During the specific implementation process, if the outer side wall of the clamping piece 33 is flush with the outer side wall of the base 31, a part of the assembly hole on the lid 8 will be exposed. Therefore, in this embodiment, a certain distance is left between the edge of the clamping piece 33 and the base 31, and the assembly hole can be further shielded by the contact of the contact wall 311 with the outer side wall of the lid 8.

[0044] Embodiment 6

[0045] As Figure 3-4As shown in the figure, a positioning structure for a pull ring 3 includes: a lock tongue 2 assembly for the box body, a vertical clamping plate 4, and a horizontal plate 5; the vertical clamping plate 4 is used to insert into the card slot 23; one end of the horizontal plate 5 is connected to the bottom end of the vertical plate, and the top wall of the other end of the horizontal plate 5 is used to abut against the box cover 8, and the horizontal plate 5 is used to connect to the base 7.

[0046] In the specific implementation process, before the box cover 8 and the base 7 are assembled, the vertical clamping plate 4 is inserted into the card slot 23. At this time, the first elastic member 1 is in a compressed state, and the lock tongue 2 is limited and locked by the vertical clamping plate 4. During the process of the box cover 8 moving downward to cover, the bottom wall of the box cover 8 abuts against the horizontal plate 5, and then the horizontal plate 5 is pushed to drive the vertical clamping plate 4 to move downward. The vertical clamping plate 4 disengages from the card slot 23, and the lock tongue 2 enters the cartridge 32 under the action of the resilience of the first elastic member 1. The connection method between the horizontal plate 5 and the base 7 is not limited in this embodiment. It can be connected to the base 7 through an elastic member, a flexible member, or a brittle member, as long as it can make a downward movement space for the horizontal plate 5 during the movement of the horizontal plate 5. Exemplarily, the horizontal plate 5 is connected to the base 7 through a cardboard. During the process of the horizontal plate 5 being pressed downward, the cardboard bends to make a downward movement space for the horizontal plate 5.

[0047] Embodiment 7

[0048] In order to improve the assembly stability of the box cover 8 and the base 7, an improvement is made on the basis of Embodiment 6, as Figure 4 shown in the figure. In this embodiment, the horizontal plate 5 is connected to the base 7 through a second elastic member 6.

[0049] In the specific implementation process, if the horizontal plate 5 and the base 7 are connected by cardboard in the same way as demonstrated in Embodiment 6, after the box cover 8 and the base 7 are assembled, the bottom wall of the box cover 8 does not have a stable supporting force and is mainly limited by the lock tongue 2 and the cartridge 32. Therefore, the second elastic member 6 is selected in this embodiment. The second elastic member 6 can be a spring. After the box cover 8 and the base 7 are assembled, the second elastic member 6 can support the box cover 8 through the resilience. Under the restriction of the lock tongue 2, the box cover 8 will not move upward due to the resilience of the second elastic member 6. It can also increase the extrusion force between the lock tongue 2 and the inner wall of the cartridge 32 through the resilience to improve the limiting effect of the lock tongue 2. Due to the resilience of the second elastic member 6, the operation is more convenient and labor-saving during the process of removing the box cover 8.

[0050] Embodiment 8

[0051] As Figure 4 shown in the figure, this embodiment includes: a base 7 and a box cover 8. The base 7 is provided with a cavity, and the second elastic member 6, the vertical clamping plate 4, and the horizontal plate 5 are accommodated in the cavity. The base 7 is provided with an opening 71, and at least a part of the positive projection of the opening 71 facing the horizontal plate 5 falls on the horizontal plate 5; the bottom wall of the box cover 8 is provided with an insertion plate 81 cooperating with the opening 71.

[0052] In the specific implementation process, if the bottom wall of the box cover 8 is fully inserted into the base 7 and abuts against the cross plate 5, the opening 71 on the base 7 is relatively large, and the sealing performance of the package is poor. Therefore, in this embodiment, an insertion plate 81 with a relatively small width is provided on the bottom wall of the box cover 8. For example, the width only accounts for 1 / 10 of the width of the box cover 8. Then, an opening 71 into which the insertion plate 81 can just be inserted is provided on the base 7. As Figure 4 shown, the thickness of the insertion plate 81 can be smaller than the thickness of the box cover 8. By the abutment of the insertion plate 81 against the cross plate 5 to push the cross plate 5 downward, the length of the insertion plate 81 can be set according to the distance that the cross plate 5 needs to move downward for the release of the locking tongue 2. When the locking tongue 2 enters the cartridge 32, the insertion plate 81 just completely enters the opening 71, and the side wall of the box cover 8 with a relatively thick thickness can also cover the opening 71 to improve the sealing performance of the package.

[0053] Embodiment 9

[0054] In order to facilitate the hook 331 to enter the inside of the box cover 8, an improvement is made on the basis of Embodiment 8. As Figure 4 shown, in this embodiment, the box cover 8 is provided with a through hole 82 through which the cartridge 32 passes and an annular hole 83 through which the clamping piece 33 passes. The through hole 82 is located in the enclosed space of the annular hole 83. One wall of the hook 331 facing the cartridge 32 is the first side wall 3311, and the first side wall 3311 is inclined. The annular hole 83 is provided with a second side wall 831 that cooperates with the first side wall 3311.

[0055] In the specific implementation process, the inclined first side wall 3311 makes the free end width of the hook 331 smaller. The second side wall 831 is also inclined in the same way as the first side wall 3311, which can make the orifice width of the annular hole 83 larger, so that it is easier for the hook 331 to enter the annular hole 83. During the movement of the hook 331 in the annular hole 83, the first side wall 3311 abuts against the second side wall 831, and the second side wall 831 moves along the surface of the second side wall 831. The clamping piece 33 deforms to a certain extent under the extrusion of the second side wall 831. When the hook 331 passes through the annular hole 83, the clamping piece 33 rebounds and resets, and the hook 331 is clamped with the inner side wall of the box cover 8.

[0056] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, for ordinary technicians in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lock tongue assembly for a box body, characterized in that: include: a first elastic member; A locking tongue, wherein the locking tongue is connected to the first elastic member, and an end of the locking tongue away from the first elastic member at least comprises a first arc surface wall and a second arc surface wall, wherein the first arc surface wall and the second arc surface wall are opposite to each other in the width direction of the locking tongue, and the first arc surface wall and the second arc surface wall are gradually tightened inwardly in the process of extending in the direction away from the first elastic member; A pull ring, the pull ring comprising: Pedestal; A cartridge, which is used for inserting the locking tongue, is connected to the bottom wall of the base, the inner wall of the cartridge is provided with inclined walls corresponding to the first curved wall and the second curved wall respectively, and a retaining ring is provided on the outer wall of the cartridge away from one end of the base.

2. The lock tongue assembly for a box body according to claim 1, characterized in that: A side wall of the locking tongue at one end away from the first elastic member is provided with a slot, and at least a portion of the slot is facing downwards; When the pull ring is assembled on the box cover and the box cover abuts against the base, the maximum distance between the inner wall of the cartridge and the side wall of the end of the locking tongue away from the first elastic member is greater than the depth of the slot.

3. The lock tongue assembly for a box body according to claim 2, characterized in that: The side wall of the locking tongue includes at least a sloped wall and a horizontal wall, the horizontal wall is connected to one end of the sloped wall away from the cartridge, one end of the sloped wall close to the horizontal wall is higher than the other end of the sloped wall, and the inner wall of the cartridge is provided with a horizontal portion cooperating with the horizontal wall.

4. The lock tongue assembly for a box body according to any one of claims 1 to 3, characterized in that: The pull ring also includes: A clamping piece, the bottom wall of the base is connected to the clamping piece, and the clamping piece is provided with a clamping hook with a free end facing the clamping cylinder.

5. The lock tongue assembly for a box body according to claim 4, characterized in that: An abutting wall for abutting against the outer side wall of the box cover is reserved between the side wall of the base and the clamping piece.

6. A pull ring positioning structure, characterized in that: include: The lock tongue assembly for a box body according to claim 4 or 5; A vertical card plate, the vertical card plate is used to be inserted into the card slot; A horizontal plate, one end of which is connected to the bottom end of the vertical clamping plate, a top wall of the other end of which is used to abut against the box cover, and the horizontal plate is used to be connected to the base.

7. The pull ring positioning structure according to claim 6, characterized in that: include: A base, wherein the transverse plate is connected to the base through a second elastic member; the base is provided with a cavity, the second elastic member, the vertical clamping plate and the transverse plate are accommodated in the cavity, and the base is provided with an opening, and at least a part of the orthographic projection of the opening toward the transverse plate falls on the transverse plate; A box cover, wherein the bottom wall of the box cover is provided with an insert plate matched with the opening.

8. The pull ring positioning structure according to claim 7, characterized in that: The box cover is provided with a through hole for the cartridge to pass through and an annular hole for the clamping piece to pass through, and the through hole is located in the enclosed space of the annular hole.

9. The pull ring positioning structure according to claim 8, characterized in that: A wall of the hook facing the cartridge is a first side wall, the first side wall is inclined, and the annular hole is provided with a second side wall matched with the first side wall.

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