Anti-fake buckle

Abstract

The utility model relates to the field of packaging box anti-fake locking devices, in particular to an anti-fake buckle which comprises a clamping sleeve and a clamping nail which are matched with each other to achieve the locking function, the clamping sleeve is formed by connecting a first component and a second component through a folding mark, and the first component comprises a first base with a baffle and a first clamping piece; the second component is provided with a second clamping piece matched with the second component and forms a mounting channel, and a third clamping piece is arranged in the channel; the staple bolt comprises a second base and a fourth clamping piece, and the fourth clamping piece and the third clamping piece are clamped to achieve locking. In addition, the clamping sleeve is integrally formed through injection molding, and structures such as a limiting beam and a guide limiting block are additionally arranged to optimize the assembly precision and the anti-fake performance. The purposes of enhancing the locking safety of the packaging box, improving the anti-counterfeiting effect and simplifying the assembly operation are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of packaging box anti-fake locking devices, in particular to an anti-fake buckle. BACKGROUND

[0002] In recent years, the packaging anti-fake technology field has developed rapidly, and the innovation and application of various anti-fake technologies have provided important protection for the safety of commodity packaging. Especially in the food, medicine, cosmetics and other industries, anti-fake technology not only can effectively prevent the circulation of fake and inferior products, but also can improve the trust of consumers on the brand. As an important part of packaging anti-fake technology, the design of anti-fake buckle directly affects the sealing and anti-fake effect of packaging, so it is concerned in actual application.

[0003] The common anti-fake buckle on the market mainly adopts the form of one pin and one sleeve to realize the locking function, in which the pin is usually embedded in the cover, and the sleeve is fixed on the inner side of the box body. In order to realize locking, the common means in the prior art include but are not limited to: directly realizing the connection of the cover and the box body through a simple buckle structure; designing a clamping position by using the deformation characteristics of elastic material to realize the cooperation of the pin and the sleeve; and increasing additional locking components to improve the firmness of the buckle. These means can meet the basic locking requirements to a certain extent, but there are various implementation ways in the specific implementation process.

[0004] However, the above conventional means generally have a significant defect: the clamping position structure is relatively exposed, which can be easily observed by others through the method of expanding the gap between the cover and the box body to observe the specific position and shape of the clamping position, thereby reducing the overall anti-fake effect of the anti-fake buckle.

[0005] Therefore, based on the above problems, the prior art needs to be improved. CONTENT OF THE INVENTION

[0006] The purpose of the present application is to provide an anti-fake buckle.

[0007] The above technical purpose of the present application is achieved by the following technical solution: a security buckle, comprising a buckle sleeve and a buckle pin matched to realize locking function, the buckle sleeve comprises a first part and a second part connected by a folding mark; the first part comprises a first base for nesting on a box cover, vertical extension is provided with a baffle on both sides of the first base, and a first clamping piece is arranged on the baffle; a second clamping piece is arranged on the second part correspondingly, the first clamping piece and the second clamping piece are matched with each other, so that the second part can be installed on the first part; the second part is hollow to form an installation channel, and a third clamping piece is arranged in the installation channel; the buckle pin comprises a second base for fixing on a box body, a fourth clamping piece is arranged on the second base, the fourth clamping piece can pass through the installation channel and be clamped with the third clamping piece to realize locking of the box cover and the box body.

[0008] By adopting the above technical solution, the first part and the second part of the buckle sleeve are connected by the folding mark and can be detachably installed by the cooperation of the first clamping piece and the second clamping piece, so that the third clamping piece on the second part is hidden inside the hollow installation channel, avoiding direct exposure of the clamping structure to the gap between the box cover and the box body, effectively preventing the clamping details from being observed by external vision; the baffles on both sides of the first base form physical shielding of the gap, further blocking the illegal observation path, and improving the concealment of the security buckle. At the same time, the fourth clamping piece of the buckle pin passes through the installation channel and precisely clamps with the third clamping piece, realizing stable locking of the box cover and the box body. The clamping process is completed in the closed installation channel, combined with the cooperation structure of multiple clamping pieces, which significantly enhances the reliability and anti-damage of the connection, solves the problems of easy observation of the clamping position and easy cracking of the locking of the traditional security buckle from the structural design, and effectively improves the anti-fake performance and use safety of the package.

[0009] Optionally, the buckle sleeve is an integral injection molding structure.

[0010] By adopting the above technical solution, the buckle sleeve adopts an integral injection molding structure, so that the connection structure formed by the folding mark of the first part and the second part has higher integrity and structural strength, avoiding the possible splicing gap or weak link of the split structure, and improving the durability of the buckle sleeve when repeatedly opening and closing or under stress. At the same time, the integral molding process can accurately control the thickness, flexibility of the folding mark and the size accuracy of the clamping piece, ensure the clamping cooperation of the second part and the first part to be more stable, and effectively prevent the clamping position from being exposed due to loose parts; in addition, this structure design simplifies the production process and reduces the assembly cost, and since there is no detachable part, the anti-damage and anti-fake performance of the buckle sleeve are further enhanced, making it difficult to be disassembled or imitated, providing strong support for the reliability and concealment of the security buckle from the manufacturing process level.

[0011] Optionally, the second component is provided with a first scale, and the second base is correspondingly provided with a second scale, and the first scale and the second scale are matched to provide additional positioning and anti-fake identification functions.

[0012] By adopting the above technical scheme, the tooth shapes, intervals or protrusion / groove structures of the first scale and the second scale are matched with each other, clear alignment references are provided when the sleeve and the pin are matched, the fourth clamping part is ensured to pass through the installation channel along a preset path and accurately clamped with the third clamping part, locking failure caused by installation deviation is avoided, and assembly efficiency and locking reliability are improved; the first scale and the second scale can be designed as specific structures (such as asymmetric tooth shapes, customized code tooth intervals, etc.) having a unique corresponding relationship, and clamping can be achieved only when the two are completely matched, and the combined features formed after clamping have non-replicability. When the package is illegally opened, the scale structure may be irreversibly deformed (such as tooth breakage, misalignment) due to stress, forming an obvious damage mark, which facilitates users to quickly judge whether the package is tampered with by observing the scale state, and increases the verifiability and anti-replication capability of the anti-fake buckle from the structural level, effectively curbing counterfeit and inferior behaviors.

[0013] Optionally, a limiting beam is arranged between the two side baffles of the first base.

[0014] By adopting the above technical scheme, the limiting beam arranged between the two side baffles of the first base can form a transverse constraint on the insertion path of the pin during the installation process of the pin, ensure that the fourth clamping part of the pin accurately passes through the installation channel of the second component in a preset direction, and avoid misalignment with the third clamping part due to deviation; the limiting beam and the two side baffles jointly constitute a guide structure, provide clear positioning references for the installation of the pin, and enable the fourth clamping part to maintain a stable axial movement track when passing through the installation channel, so that reliable clamping cooperation with the third clamping part is achieved, the accuracy and stability of the pin and the sleeve during locking are effectively improved, and locking failure caused by pin installation deviation is prevented, thereby ensuring stable implementation of the anti-fake buckle locking function from the structural design.

[0015] Optionally, a guide limiting block is arranged on the side of the baffle away from the first base, and the guide limiting block is clamped and matched with the second component.

[0016] By adopting the above technical scheme, the guide limiting block arranged on the side of the baffle away from the first base is clamped and matched with the second component, can provide a clear guide path when the second component is installed to the first component, ensure that the second component is accurately pressed down along a preset direction and accurately connected with the clamping part of the first component, and avoid installation deviation or misalignment; after clamping and matching, the guide limiting block can effectively limit the displacement of the second component, prevent it from shaking or disengaging due to external force during use, and enhance the stability of the overall structure of the sleeve.

[0017] Optionally, the first base is provided with a guide mounting block, and the guide mounting block is provided with a mounting groove for embedding and mounting the second component.

[0018] By adopting the above technical scheme, the guide mounting block on the first base and the mounting groove thereon provide precise guidance and positioning structure for the embedding and mounting of the second component: the guide mounting block can guide the second component to move in a specific direction, ensuring that the second clamping part on the second component is quickly aligned with the first clamping part of the first component, reducing installation deviation; the embedding design of the mounting groove makes the second component form a close physical fit with the first base after installation, limiting its transverse or longitudinal displacement, enhancing the stability of the overall structure of the clamping sleeve, avoiding exposure of the clamping position or locking failure caused by loose components; at the same time, the embedding and mounting mode can make the second component more closely fit the first base, cooperating with the shielding effect of the baffle, further hiding the internal clamping structure and the installation channel, improving the concealment of the anti-fake buckle, and the structure design simplifies the assembly process, improves the production and installation efficiency through precise guidance and positioning, and provides structural protection for reliable locking and long-term use of the anti-fake buckle.

[0019] Optionally, the first base is provided with a pad corresponding to the guide mounting block, and the guide mounting block and the pad cooperate to support the second component.

[0020] By adopting the above technical scheme, the guide mounting block on the first base and the corresponding pad form a multi-point support structure for the second component: the mounting groove of the guide mounting block provides embedding and positioning for the second component, and the pad provides stable support force from below or the side, and the two cooperate to keep the second component horizontal or at a preset angle after installation, avoiding tilting or deformation caused by uneven stress, ensuring that the clamping parts on the second component are precisely matched with the first component; this support structure effectively disperses the pressure received by the second component during clamping, improving the overall structural strength and durability of the clamping sleeve, preventing loose or failure of the clamping position caused by insufficient support during long-term use; at the same time, the cooperation of the pad and the guide mounting block makes the second component more closely fit the first base, reducing the gap between the components, cooperating with the shielding effect of the baffle, further hiding the internal clamping structure, enhancing the concealment and anti-damage of the anti-fake buckle, and providing stable mechanical support and structural protection for reliable locking of the box cover and the box body.

[0021] Optionally, the installation channel is provided with a guide surface at a side passage opening for the fourth clamping part to pass through.

[0022] By adopting the technical scheme, the guide surface at the channel opening on one side of the installation channel can provide an inclined or arc surface guide structure when the fourth clamping piece is inserted, guiding the fourth clamping piece of the clasp to be smoothly inserted into the installation channel along a preset angle, effectively reducing the insertion resistance and avoiding clamping misplacement caused by angle deviation, and improving the alignment efficiency and installation convenience when the clasp cooperates with the clamping sleeve. The guide surface design can ensure that the fourth clamping piece quickly and accurately clamps with the third clamping piece, reducing part collision and wear, enhancing the stability and durability of the clamping structure, and making the locking process more compact, avoiding gaps or looseness caused by misplacement of the clamping, and optimizing the operation experience and locking reliability of the anti-fake buckle from the details, and providing more stable structural support for the sealing and anti-fake function of the package.

[0023] In summary, the present application at least contains the following one beneficial effect:

[0024] 1. The first component and the second component of the clamping sleeve are connected through the folding mark and are detachably installed by the cooperation of the first clamping piece and the second clamping piece, so that the third clamping piece on the second component is hidden inside the hollow installation channel, avoiding the direct exposure of the clamping structure in the gap between the box cover and the box body, effectively preventing the clamping details from being observed by external vision; the baffles on both sides of the first base form a physical barrier to the gap, further blocking the illegal observation path, and improving the concealment of the anti-fake buckle. At the same time, the fourth clamping piece of the clasp is inserted into the installation channel and accurately clamped with the third clamping piece, realizing the stable locking of the box cover and the box body, and the clamping process is completed in the closed installation channel, combined with the cooperation structure of multiple clamping pieces, which significantly enhances the reliability and anti-damage of the connection, and solves the problems of easy observation of the clamping position of the traditional anti-fake buckle and easy cracking of the locking from the structural design, effectively improving the anti-fake performance and use safety of the package.

[0025] 2. The tooth shape, pitch or protrusion / groove structure of the first and second calipers match each other, providing a clear alignment reference when the clamping sleeve cooperates with the clasp, ensuring that the fourth clamping piece is inserted into the installation channel along a preset path and accurately clamped with the third clamping piece, avoiding locking failure caused by installation deviation, and improving assembly efficiency and locking reliability; the first and second calipers can be designed as specific structures with a unique corresponding relationship (such as asymmetric tooth shape, customized coded tooth pitch, etc.), and clamping can only be achieved when they are completely matched, and the combined features formed after clamping are not reproducible. When the package is illegally opened, the caliper structure may be irreversibly deformed (such as tooth breakage, misplacement) due to stress, forming an obvious damage mark, which facilitates users to quickly judge whether the package has been tampered with by observing the caliper state, and increases the verifiability and anti-copying ability of the anti-fake buckle from the structural level, effectively curbing counterfeit and inferior behaviors. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural diagram of an anti-fake buckle;

[0027] Figure 2 is a structural schematic view of the card sleeve;

[0028] Figure 3 is a structural schematic view of the card pin;

[0029] Figure 4 is a structural schematic view of the guide surface.

[0030] Reference signs

[0031] 1, card sleeve; 2, card pin; 3, folding mark; 4, first part; 5, second part; 6, first base; 7, baffle; 8, first clamping part; 9, second clamping part; 10, installation channel; 11, third clamping part; 12, second base; 13, fourth clamping part; 14, first caliper; 15, second caliper; 16, limiting beam; 17, guide limiting block; 18, guide installation block; 19, installation groove; 20, pad block; 21, guide surface. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings, and the described embodiments are only possible technical implementations of the present application, and not all possible implementations. Those skilled in the art can combine the embodiments of the present application without creative labor to obtain other embodiments, and these embodiments are also within the protection scope of the present application.

[0033] The common anti-fake buckle on the market at present mainly adopts a one-pin-one-sleeve form to realize the locking function, wherein the card pin 2 is usually embedded into the box cover, and the card sleeve 1 is fixed to the inner side of the box body. However, this design is easy to be observed by others through the method of expanding the gap between the box cover and the box body to observe the specific position and shape of the card position, thereby reducing the overall anti-fake effect of the anti-fake buckle. Therefore, the present application mainly adopts the following scheme to improve the concealment and reliability of the anti-fake buckle, and the specific effects are as follows:

[0034] Embodiment 1, refer to Figures 1-3The anti-fake buckle provided by the embodiment of the application comprises a sleeve 1 and a clasp 2 which are matched to realize locking function, wherein the sleeve 1 is composed of a first part 4 and a second part 5, and the first part 4 and the second part 5 are connected through a folding mark 3. The first part 4 comprises a first base 6 used for being nested on a box cover, and a baffle 7 is vertically arranged on both sides of the first base 6, and a first clamping part 8 is arranged on the baffle 7; a second clamping part 9 is correspondingly arranged on the second part 5, and the first clamping part 8 and the second clamping part 9 are matched with each other, so that the second part 5 can be installed on the first part 4 after being folded; the second part 5 is hollowly arranged to form an installation channel 10, and a third clamping part 11 is arranged in the installation channel 10; the clasp 2 comprises a second base 12 used for being fixed on a box body, and a fourth clamping part 13 is arranged on the second base 12, the fourth clamping part 13 can be arranged through the installation channel 10 and is clamped with the third clamping part 11 to realize locking of the box cover and the box body, so that the concealment and reliability of the anti-fake buckle are improved.

[0035] Specifically, the first part 4 comprises the first base 6 and the baffle 7. The first base 6 can be made of plastic material, for example, polypropylene or polyethylene, and has good toughness and impact resistance. The baffle 7 is vertically extended from both sides of the first base 6, and the height of the baffle 7 can be adjusted according to actual requirements. The thickness of the baffle 7 is ensured to be sufficient to have strength while not affecting the lightweight design of the overall structure. The first clamping part 8 can be a buckle protrusion or a clamping groove structure, for example, a buckle protrusion is arranged on the inner side of the baffle 7, which is used for cooperating with the second clamping part 9 on the second part 5 to realize preliminary positioning and fixing.

[0036] Specifically, the second part 5 comprises the installation channel 10 and the third clamping part 11. The internal shape of the installation channel 10 can be designed as a circle or a square to adapt to different shapes of the clasp 2. The third clamping part 11 can be a hollow bayonet structure, and buckles are arranged on the opposite sides in the installation channel 10. Correspondingly, the fourth clamping part 13 is a buckle structure.

[0037] Specifically, the clasp 2 comprises the second base 12 and the fourth clamping part 13. The second base 12 can be made of metal material, for example, stainless steel or aluminum alloy, and has good corrosion resistance and mechanical strength. The second base 12 can be fixed through a screw or directly embedded into the inner side of the box body, and the fixing mode can be selected according to actual requirements. The fourth clamping part 13 is preferably a buckle structure, and the end part is designed as a guide surface 21 with a certain slope, so as to be smoothly arranged through the installation channel 10 and cooperated with the third clamping part 11 to realize clamping.

[0038] Specifically, the sleeve 1 is an integrally injection molded structure, which simplifies the manufacturing process and improves the production efficiency. The integrally injection molding process can be produced by using an injection molding machine, and factors such as demolding slope and cooling time need to be considered during mold design to ensure stable product quality.

[0039] Specifically, the first caliper 14 is arranged on the second component 5, and the second caliper 15 is correspondingly arranged on the second base 12. The first caliper 14 and the second caliper 15 are matched to provide additional positioning and anti-fake identification functions. The first caliper 14, for example, a sawtooth-shaped protrusion, is arranged on the outer side of the second component 5, and the second caliper 15, for example, a matching sawtooth-shaped groove, is correspondingly arranged on the second base 12. The tooth shapes and spacings of the two are strictly matched. When clamped, the first caliper 14 and the second caliper 15 are engaged, not only providing an installation positioning reference, but also forming a unique combination feature. If the package is illegally tampered with, the caliper teeth are easily broken or misaligned, forming an obvious damage mark, which is convenient for the user to judge whether the package has been tampered with.

[0040] Specifically, the limiting beam 16 is arranged between the baffles 7 on both sides of the first base 6, which is used to limit the floating range of the second component 5 and improve the structural stability. The limiting beam 16 can be designed as a rectangular beam structure, forming a “door frame” type support with the baffles 7. When the clamping nail 2 is inserted, it forms a horizontal constraint on the path of the fourth clamping piece 13, ensuring its accurate axial insertion along the installation channel 10, and avoiding offset to cause clamping failure.

[0041] Specifically, the side of the baffle 7 away from the first base 6 is provided with a guide limiting block 17, which is clamped and matched with the second component 5, used to guide the installation direction of the second component 5 and prevent misalignment. When the second component 5 and the first component 4 are installed with each other, the guide limiting block 17 is clamped and matched with the edge of the second component 5, providing guidance when the second component 5 is pressed down, ensuring the accurate alignment of the clamping piece, while limiting the displacement of the second component 5 to avoid loosening and expose the clamping position. The material of the guide limiting block 17 can be the same as that of the baffle 7. The surface of the guide limiting block 17 can be provided with smooth treatment to reduce friction and improve installation smoothness.

[0042] Specifically, referring to Figures 1-2 , the first base 6 is provided with a guide installation block 18, and the guide installation block 18 is provided with an installation groove 19 for embedding and installing the second component 5. The number of guide installation blocks 18 can be set according to actual needs, for example, one or more on each side of the first base 6. The first base 6 is provided with a pad 20 corresponding to the guide installation block 18, which cooperates with the guide installation block 18 to support the second component 5, so as to enhance the stability of the structure. The pad 20 can be designed as a rectangular block structure, and the material can be the same as that of the first base 6. The position of the pad 20 can be adjusted according to actual needs to ensure the support effect on the second component 5.

[0043] Specifically, referring to Figure 4The installation channel 10 is provided with a guide surface 21 at the side channel opening through which the fourth clamping piece 13 is arranged to pass, so as to guide the fourth clamping piece 13 to smoothly enter the installation channel 10 and achieve clamping. The guide surface 21 can be designed as an inclined surface or an arc surface structure, and the surface of the guide surface 21 can be provided with a polishing treatment to reduce friction and improve installation smoothness.

[0044] The implementation principle of the embodiment is that before locking and installation, the first base 6 of the first component 4 is nested and fixed on the box cover, the second component 5 is naturally floated outside the first component 4 through the folding mark 3, at this time, the second clamping piece 9 is not matched with the first clamping piece 8, the installation channel 10 is in an open state, and the second base 12 of the clamping nail 2 is fixed at a corresponding position of the box body. When locking, the box cover is closed on the box body, the second component 5 is flipped along the folding mark 3 to the first component 4, the guide limiting block 17 guides the second component 5 to be accurately positioned, the first clamping piece 8 is clamped with the second clamping piece 9, the second component 5 is embedded in the installation groove 19 and supported by the pad 20. Continue to press the box cover, the fourth clamping piece 13 of the clamping nail 2 enters the installation channel 10 along the guide surface 21, is clamped with the third clamping piece 11, and at the same time, the first clamping piece 14 is engaged with the second clamping piece 15, and the locking is completed. At this time, the baffle 7, the limiting beam 16 and the guide limiting block 17 jointly shield the gap, and the clamping structure is completely hidden inside. Normal opening needs to damage the clamping structure (such as cutting off the clamping nail 2 or tearing the clamping sleeve 1), at this time, the engagement state of the first clamping piece 14 and the second clamping piece 15 is damaged, and visible marks such as tooth breakage and misalignment appear, and the user can judge whether the package is illegally opened by observing the integrity of the clamping piece.

[0045] Embodiment 2, the difference between the embodiment and the above-mentioned embodiment is that the structure design of the clamping sleeve 1 is further optimized, the anti-skid lines and the reinforcing ribs are added, and the durability and the anti-fake effect of the clamping sleeve 1 are improved.

[0046] Specifically, the surface of the first base 6 is provided with anti-skid lines, for example, grid-shaped lines intersecting longitudinally and transversely, and the material can be the same as that of the first base 6. The design of the anti-skid lines can increase the friction between the clamping sleeve 1 and the box cover, and prevent the clamping sleeve 1 from sliding or falling off during use.

[0047] Specifically, the inner side of the baffle 7 is provided with reinforcing ribs, for example, a plurality of parallel rib strips arranged along the length direction of the baffle 7, and the material can be the same as that of the baffle 7. The design of the reinforcing ribs can improve the strength and rigidity of the baffle 7, and prevent deformation or damage during use.

[0048] The implementation principle of the embodiment is that by adding the design of the anti-skid lines and the reinforcing ribs, the durability and the anti-fake effect of the clamping sleeve 1 are further improved, the sliding or damage of the clamping sleeve 1 during use is effectively prevented, and the overall practicability and reliability are significantly improved.

[0049] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A security fastener, characterized by, The utility model provides a box locking device, which comprises a sleeve (1) and a pin (2) matched to realize a locking function, the sleeve (1) comprises a first part (4) and a second part (5) connected through a folding mark (3); the first part (4) comprises a first base (6) for nesting on a box cover, the first base (6) is provided with a baffle (7) vertically extended on both sides, and the baffle (7) is provided with a first clamping piece (8); the second part (5) is provided with a second clamping piece (9) correspondingly, the first clamping piece (8) and the second clamping piece (9) are matched, so that the second part (5) can be installed on the first part (4); the second part (5) is hollow and provided with an installation channel (10), and the installation channel (10) is provided with a third clamping piece (11); the pin (2) comprises a second base (12) for being fixed on a box body, the second base (12) is provided with a fourth clamping piece (13), the fourth clamping piece (13) can pass through the installation channel (10) and be clamped with the third clamping piece (11) to realize the locking of the box cover and the box body.

2. The security fastener of claim 1, wherein, The sleeve (1) is an integrally injection molded structure.

3. The security fastener of claim 1, wherein: The second part (5) is provided with a first caliper (14), and the second base (12) is provided with a second caliper (15) correspondingly; the first caliper (14) and the second caliper (15) are matched to provide additional positioning and anti-fake identification functions.

4. The security fastener of claim 1, wherein: Limiting beams (16) are arranged between the baffles (7) on both sides of the first base (6).

5. The security fastener of claim 1, wherein: The baffle (7) is provided with a guide limiting block (17) away from the first base (6), and the guide limiting block (17) is clamped with the second part (5).

6. The security fastener of claim 1, wherein: The first base (6) is provided with a guide mounting block (18), and the guide mounting block (18) is provided with a mounting groove (19) for the nesting and mounting of the second part (5).

7. A security fastener as defined in claim 6, wherein The first base (6) is provided with a pad (20) corresponding to the guide mounting block (18), and the guide mounting block (18) and the pad (20) support the second part (5).

8. The security fastener of claim 1, wherein: The installation channel (10) is provided with a guide surface (21) at a side channel opening for the fourth clamping piece (13) to pass through.

Images