A grain sample divider splash-proof and dust-proof device
By designing a splash-proof and dust-proof device for the grain sampler, the problems of splashing and dust during grain sampling were solved, achieving accuracy and cleanliness in grain sampling and ensuring the reliability of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CERTIFICATION & INSPECTION GRP FUJIAN CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-19
AI Technical Summary
Existing grain samplers are prone to grain splashing and dust generation during the sampling process, which affects the accuracy and reliability of the test results.
A grain sampler anti-splash and anti-dust device was designed, including a feed cylinder, a diverter cylinder, a grain collector, and a dust cover. The device prevents grain splashing and dust by controlling the grain flow path and using a dust-absorbing sponge.
It effectively prevents grain splashing and dust, ensures the accuracy and cleanliness of the grain sampling process, and improves the reliability of test results.
Smart Images

Figure CN224382913U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sampler technology, specifically to a grain sampler anti-splash and anti-dust device. Background Technology
[0002] Grain samplers are important tools in grain quality testing. They are used to separate the grains to be tested, ensuring the accuracy and reliability of the test results.
[0003] The prior art can be referenced in Chinese Patent No. CN221528163U, which discloses a grain testing and sampling device, including a sampling device assembly and an adjustment assembly. The adjustment assembly is located below the sampling device assembly, and an auxiliary assembly is located above it. The adjustment assembly includes a fixed rod with a spring connected internally. An extension rod is mounted to one end of the spring, and a limit block is connected to the upper outer wall of the extension rod. A sliding groove is formed on the surface of the fixed rod, and three slots are formed on one side of the sliding groove. This grain testing and sampling device can adjust the height of the discharge port through the adjustment assembly; however, during sampling, grain splashes out of the discharge port and scatters haphazardly on the ground, generating dust. Utility Model Content
[0004] In view of the above problems, this utility model provides a splash-proof and dust-proof device for a grain sampler.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A grain sampler anti-splash and anti-dust device includes:
[0007] The feeding cylinder includes a first cylinder body and a discharge funnel. The discharge funnel is disposed inside the first cylinder body. One end of the discharge funnel is fixedly connected to the first cylinder body. A control unit is provided at the bottom of the other end of the discharge funnel. The control unit is used to control the grain flow.
[0008] The feed cylinder is positioned above the flow divider. The flow divider includes a second cylinder, a first hollow conduit, a first flow divider groove, a second flow divider groove, and a flow divider cone. The flow divider cone is placed inside the second cylinder, and a flow divider channel is formed between the flow divider cone and the second cylinder. The tip of the flow divider cone is positioned opposite to the discharge port of the discharge funnel. The second flow divider groove is positioned below the flow divider channel, with one end of the second flow divider groove communicating with the flow divider channel and the other end communicating with the first hollow conduit. The first flow divider groove is communicating with the flow divider channel.
[0009] A grain collector, comprising a first grain collector and a second grain collector, wherein the first grain collector is used to collect grain flowing out from the first diversion trough, and the second grain collector is used to collect grain flowing out from the second diversion trough.
[0010] The dust cover, comprising a cover body, is installed over the discharge port of the grain collector and the diverter cylinder to prevent grain from splashing and dust from being generated.
[0011] Preferably, the dust cover includes a cover body, a dust cover frame, and a dust-absorbing sponge. The dust cover frame is disposed on the inner wall of the cover body, and the dust-absorbing sponge is disposed on the dust cover frame. The dust cover is used to prevent grain from splashing and dust from being generated.
[0012] Preferably, there are multiple second diversion channels, and there is a gap between adjacent second diversion channels. The gap is a first diversion channel, and the first diversion channel and the second diversion channel are arranged in annular intervals on the inner wall of the second cylinder.
[0013] Preferably, the tip of the diverting cone protrudes from the second cylinder, and the diverting cone is coaxially arranged with the discharge port of the discharge funnel.
[0014] Preferably, the dustproof frame has opposing sliding grooves, through which the dust-absorbing sponge is slidably connected to the dustproof frame.
[0015] Preferably, the cover is provided with ventilation holes, which are arranged opposite to the dust-absorbing sponge.
[0016] Preferably, the first grain collector is located below the diverter cylinder, the second grain collector is located below the first grain collector, a second hollow conduit is provided in the middle of the first grain collector, the second hollow conduit is coaxially arranged with the first hollow conduit, one end of the second hollow conduit abuts against the first hollow conduit, and the other end of the second hollow conduit is connected to the second grain collector.
[0017] Preferably, the outer wall of the diverter is fixedly connected with multiple legs, and a support pad is provided between the multiple legs. The support pad has an opening in the middle, the first grain collector is disposed on the support pad, and the opening is coaxially arranged with the second hollow conduit.
[0018] Preferably, the outer wall of the first cylinder is provided with a plurality of latches, and the outer wall of the second cylinder is provided with a plurality of lock seats. The latches are adapted to the lock seats, and the number of latches corresponds one-to-one with the number of lock seats.
[0019] The above technical solution has the following beneficial effects: the grain to be sampled is placed in the feed cylinder, the control unit is turned on, the grain flows into the distribution cylinder to start the sampling, and after the grain is sampled, it falls into the first grain collector and the second grain collector respectively. By setting up a dust cover, the grain will not be sprayed randomly, and dust will be avoided at the same time. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the sample divider described in an embodiment of the present invention;
[0021] Figure 2 This is a top view of the flow divider described in an embodiment of the present utility model;
[0022] Figure 3 This is a schematic diagram of the structure of the dust cover described in an embodiment of the present utility model;
[0023] Figure 4 This is a schematic diagram of the dust cover and the protective plate described in an embodiment of the present utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. Feeding cylinder; 11. Discharge funnel; 111. Feeding port; 112. Discharge port; 12. First cylinder; 2. Diverting cylinder; 21. Second cylinder; 22. Diverting cone; 23. Diverting channel; 24. Second diverting groove; 25. First diverting groove; 26. First hollow guide tube; 3. First grain collector; 31. Second hollow guide tube; 32. Support plate; 321. Opening; 4. Second grain collector; 41. Support leg; 5. Lock; 51. Lock seat; 6. Dust cover; 61. Cover body; 62. Dust-absorbing sponge; 63. Dust cover frame; 64. Vent hole; 65. Protective plate; 66. Magnet; 67. Slide groove. Detailed Implementation
[0026] To illustrate in detail the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this utility model, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this utility model and are therefore intended to limit the scope of protection of this utility model.
[0027] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0028] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.
[0029] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.
[0030] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.
[0031] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.
[0032] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.
[0033] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.
[0034] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.
[0035] Please see Figures 1 to 4 This embodiment provides a splash-proof and dust-proof device for a grain sampler, comprising:
[0036] Feeding cylinder 1, the feeding cylinder 1 includes a first cylinder body 12 and a discharge funnel 11, the discharge funnel 11 is disposed inside the first cylinder body 12, one end of the discharge funnel 11 is fixedly connected to the first cylinder body 12, and a control unit is provided at the bottom of the other end of the discharge funnel 11, the control unit is used to control the grain flow.
[0037] Diverting cylinder 2, the feed cylinder 1 is disposed above the diverting cylinder 2, the diverting cylinder 2 includes a second cylinder 21, a first hollow conduit 26, a first diverting groove 25, a second diverting groove 24 and a diverting cone 22, the diverting cone 22 is placed in the second cylinder 21 and there is a diverting channel 23 between the diverting cone 22 and the second cylinder 21, the tip of the diverting cone 22 is opposite to the discharge port 112 of the discharge funnel 11, the second diverting groove 24 is placed below the diverting channel 23, one end of the second diverting groove 24 is connected to the diverting channel 23 and the other end is connected to the first hollow conduit 26, the first diverting groove 25 is connected to the diverting channel 23;
[0038] The grain collector includes a first grain collector 3 and a second grain collector 4. The first grain collector 3 is used to collect grain flowing out of the first diversion trough 25, and the second grain collector 4 is used to collect grain flowing out of the second diversion trough 24.
[0039] The dust cover 6 includes a cover body 61, a dust cover frame 63, and a dust-absorbing sponge 62. The dust cover frame 63 is disposed on the inner wall of the cover body 61, and the dust-absorbing sponge 62 is disposed on the dust cover frame 63. The dust cover 6 is used to prevent grain from splashing and dust from being generated.
[0040] The discharge hopper 11 includes a feed inlet 111 and a discharge outlet 112, with the diameter of the feed inlet 111 being larger than the diameter of the discharge outlet 112.
[0041] One end of the second diversion groove 24 is fixed to the inner wall of the second cylinder 21, and the other end is connected to the first hollow conduit 26 and communicates with the first hollow conduit 26. The diversion cone 22 is fixed on the second diversion groove, and the diversion cone 22 is coaxially arranged with the second cylinder 21 and the first hollow conduit 26.
[0042] Please see Figure 3 as well as Figure 4 The top of the dust cover 6 is U-shaped, enclosing the diverter 2 and the grain collector. The dust cover 6 has three dust-absorbing sponges 62, each mounted on a dust-proof frame 63 on the inner wall of the cover body 61. Optionally, at least one dust-absorbing sponge 62 can be mounted on each dust-proof frame 63. In other embodiments, the dust cover 6 also includes a detachable protective plate 65, which also has dust-proof frames 63, dust-absorbing sponges 62, and ventilation holes 64. This protective plate 65 closes the dust cover 6. Specifically, the protective plate 65 is attached to the dust cover 6 by magnets 66 mounted on the cover body 61.
[0043] The grain to be sampled is placed in the feed cylinder 1. The control unit is turned on, and the grain flows into the diversion cylinder 2 to start the sampling. After sampling, the grain falls into the first grain collector 3 and the second grain collector 4 respectively. By setting up the dust cover 6, the grain will not be sprayed randomly, and dust will be avoided at the same time.
[0044] In some embodiments, the dust cover 6 is a frame structure in which a dust-absorbing sponge 62 can be placed. That is, when the grain is diverted, both the first grain collector 3 and the second grain collector 4 are covered by the dust-absorbing sponge 62. The dust that is raised will be adhered by the wet dust-absorbing sponge 62, so as to achieve the dust removal effect.
[0045] Please see Figure 1 and Figure 2In this embodiment, there are multiple second diversion channels 24, with gaps between adjacent second diversion channels 24. These gaps are first diversion channels 25, and the first diversion channels 25 and the second diversion channels 24 are arranged annularly at intervals on the inner wall of the second cylinder 21. Optionally, there are eighteen second diversion channels 24, arranged annularly at intervals. This makes the grain sampling more uniform, ensuring more accurate subsequent test results. In other embodiments, multiple second diversion channels 24 are concentrated on one side of the inner wall of the second cylinder 21, but this scheme results in uneven grain sampling and reduces the accuracy of the test. Therefore, the arrangement of the first diversion channels 25 and the second diversion channels 24 annularly at intervals on the inner wall of the second cylinder 21 is the preferred embodiment.
[0046] Please see Figure 1 In this embodiment, the tip of the diversion cone 22 protrudes from the second cylinder 21, and the diversion cone 22 is coaxially arranged with the discharge port 112 of the discharge funnel 11. The tip of the diversion cone 22 is located exactly at the center of the discharge port 112. The grain flows out from the discharge port 112, and after being acted upon by the tip of the diversion cone 22, the grain flows evenly along the conical surface of the diversion cone 22 into the first diversion groove 25 and the second diversion groove 24, ensuring that the grain is evenly distributed.
[0047] Please see Figure 3 and Figure 4 In this embodiment, the dustproof frame 63 has opposing sliding grooves 67, through which the vacuuming sponge 62 is slidably connected to the dustproof frame 63. The dustproof frame 63 is fixed to the inner wall of the cover 61, and the opposing sliding grooves 67 facilitate the installation, removal, and replacement of the vacuuming sponge 62. This design is simple and convenient. In other embodiments, the dustproof frame 63 has threaded holes, through which the vacuuming sponge 62 is screwed for fixation. However, this solution is not convenient for the removal and replacement of the vacuuming sponge 62. Therefore, using sliding grooves 67 on the dustproof frame 63 to house the vacuuming sponge 62 is the preferred solution.
[0048] Please see Figure 3 and Figure 4 In this embodiment, the cover 61 is provided with ventilation holes 64, which are arranged opposite to the dust-absorbing sponge 62. Ventilation holes 64 are provided on all three side walls of the cover 61, enhancing the convection effect of the gas inside the cover 61, thereby enabling the dust-absorbing sponge 62 to better filter dust in the gas and prevent dust from being stirred up.
[0049] Please see Figure 1In this embodiment, the first grain collector 3 is located below the diversion cylinder 2, and the second grain collector 4 is located below the first grain collector 3. A second hollow conduit 31 is provided in the middle of the first grain collector 3. The second hollow conduit 31 is coaxially arranged with the first hollow conduit 26. One end of the second hollow conduit 31 abuts against the first hollow conduit 26, and the other end of the second hollow conduit 31 is connected to the second grain collector 4. The aperture of the second hollow conduit 31 is the same as that of the first hollow conduit 26. Their coaxial arrangement and abutment prevent grain from splashing out of the first hollow conduit 26, allowing the grain flowing from the second diversion trough 24 to fall smoothly into the second grain collector 4.
[0050] In this embodiment, the control unit is a scissor door structure. Specifically, the control unit includes: a pull pin, a fixed base, a first baffle, a second baffle, a first connector, and a second connector. The fixed base is fixedly connected to the discharge funnel 11. The first baffle and the second baffle are hinged together. One end of the first connector and the second connector are slidably connected to the fixed base. The other end of the first connector is connected to the first baffle, and the other end of the second connector is connected to the second baffle. One end of the pull pin is connected to the first baffle, and the other end passes through the inner wall of the first cylinder 12 and extends to the outside of the feed cylinder 1.
[0051] A gap exists between the fixed base and the discharge funnel 11 to accommodate the first and second baffles. The fixed base serves as a base, rigidly connecting the discharge funnel 11 and providing support for the first and second baffles. A groove on the fixed base provides a sliding track for the connecting component. The first and second baffles are hinged to form a scissor-like structure, together constituting the discharge gate of the openable discharge funnel 11. The connecting component converts the rotational movement of the first and second baffles into linear sliding, constraining their motion trajectory. Combined with the pulling and pushing of the pull pin, this enables the opening and closing of the control unit. The control unit allows the testing personnel to control the start and stop of grain sampling to obtain the required test quantity.
[0052] In another embodiment, the control unit includes: a fixed base, a first gear, a second gear, a first baffle, a second baffle, and a pull pin; the first gear is fixedly connected to the first baffle and located at one end of the first baffle, and the second gear is fixedly connected to the second baffle and located at one end of the second baffle; the rotation center of the first gear is rotatably connected to the fixed base, and the rotation center of the second gear is rotatably connected to the fixed base, and the first gear and the second gear mesh with each other; the pull pin is connected to the first baffle or the second baffle, and further, the connection position of the pull pin to the first baffle or the second baffle is located at the end away from the first gear or the second gear. Preferably, the pull pin is rotatably connected to the first baffle or the second baffle.
[0053] Please see Figure 1 In this embodiment, the outer wall of the diversion cylinder 2 is fixedly connected with multiple support legs 41, and a support plate 32 is provided between the multiple support legs 41. The support plate 32 has an opening 321 in the middle. The first grain collector 3 is disposed on the support plate 32, and the opening 321 is coaxially arranged with the second hollow conduit 31. Optionally, the number of support legs 41 is at least three, and the multiple support legs 41 are evenly fixed on the outer wall of the diversion cylinder 2 to provide suspension support, so that the diversion cylinder 2 is suspended to facilitate the placement of the grain collector below. The support plate 32 is horizontally disposed between the support legs 41 to support the first grain collector. The opening 321 in the middle of the support plate 32 serves as a channel for grain to fall. The opening 321 is coaxially aligned with the second hollow conduit 31 to ensure that the grain falls vertically into the second grain collector and prevents the grain from splashing onto the support plate 32. Multiple support legs 41 provide rigid support for the diverter 2, ensuring that the diverter 2 remains stable and does not tilt during grain sampling. At the same time, rubber anti-slip pads can be added to the bottom of the support legs 41 to prevent slipping and reduce vibrations generated during the operation of the sampler.
[0054] Please see Figure 1 In this embodiment, the outer wall of the first cylindrical body 12 is provided with multiple latches 5, and the outer wall of the second cylindrical body 21 is provided with multiple locking seats 51. The latches 5 and the locking seats 51 are adapted to each other, and the number of latches 5 corresponds one-to-one with the number of locking seats 51. Optionally, there are two latches 5 and two locking seats 51, and they are symmetrically distributed. The first cylindrical body 12 is sleeved on the second cylindrical body 21, and the latches 5 on the first cylindrical body 12 are engaged with the locking seats 51 on the second cylindrical body 21, ensuring a stable connection between the first cylindrical body 12 and the second cylindrical body 21, while also allowing the first cylindrical body 12 to be quickly removed from the second cylindrical body 21.
[0055] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this utility model, this should not limit the scope of patent protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this utility model and utilizing the content described in the text and drawings of this utility model, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this utility model.
Claims
1. A splash-proof and dust-proof device for a grain sampler, characterized in that, include: Feeding cylinder (1), the feeding cylinder (1) includes a first cylinder body (12) and a discharge funnel (11), the discharge funnel (11) is disposed inside the first cylinder body (12), one end of the discharge funnel (11) is fixedly connected to the first cylinder body (12), and the bottom of the other end of the discharge funnel (11) is provided with a control unit, the control unit is used to control the grain flow; The flow divider (2) is located above the feed cylinder (1). The flow divider (2) includes a second cylinder (21), a first hollow conduit (26), a first flow divider (25), a second flow divider (24), and a flow divider cone (22). The flow divider cone (22) is placed in the second cylinder (21), and there is a flow divider channel (23) between the flow divider cone (22) and the second cylinder (21). The tip of the flow divider cone (22) is opposite to the discharge port (112) of the discharge funnel (11). The second flow divider (24) is located below the flow divider channel (23), and one end of the second flow divider (24) is connected to the flow divider channel (23), and the other end is connected to the first hollow conduit (26). The first flow divider (25) is connected to the flow divider channel (23). The grain collector includes a first grain collector (3) and a second grain collector (4), wherein the first grain collector (3) is used to collect grain flowing out from the first diversion trough (25), and the second grain collector (4) is used to collect grain flowing out from the second diversion trough (24). The dust cover (6) includes a cover body (61), which covers the grain collector and the discharge port of the diverter (2) to prevent grain from splashing and dust from rising.
2. The anti-splash and anti-dust device for a grain sampler according to claim 1, wherein the dust cover (6) further includes a cover body (61), a dust cover frame (63) and a dust-absorbing sponge (62), wherein the dust cover frame (63) is disposed on the inner wall of the cover body (61) and the dust-absorbing sponge (62) is disposed on the dust cover frame (63).
3. The anti-splash and anti-dust device for a grain sampler according to claim 1, characterized in that, There are multiple second diversion channels (24), and there is a gap between adjacent second diversion channels (24). The gap is a first diversion channel (25). The first diversion channel (25) and the second diversion channel (24) are arranged in annular intervals on the inner wall of the second cylinder (21).
4. The anti-splash and anti-dust device for a grain sampler according to claim 1, characterized in that, The tip of the diversion cone (22) protrudes from the second cylinder (21), and the diversion cone (22) is coaxially arranged with the discharge port (112) of the discharge funnel (11).
5. The anti-splash and anti-dust device for a grain sampler according to claim 2, characterized in that, The dustproof frame (63) has oppositely arranged sliding grooves (67), and the dust-absorbing sponge (62) is slidably connected to the dustproof frame (63) through the sliding grooves (67).
6. The anti-splash and anti-dust device for a grain sampler according to claim 5, characterized in that, The cover (61) is provided with ventilation holes (64), which are arranged opposite to the dust-absorbing sponge (62).
7. The anti-splash and anti-dust device for a grain sampler according to claim 1, characterized in that, The first grain collector (3) is located below the diverter (2), and the second grain collector (4) is located below the first grain collector (3). The first grain collector (3) has a second hollow conduit (31) in the middle. The second hollow conduit (31) is coaxially arranged with the first hollow conduit (26). One end of the second hollow conduit (31) abuts against the first hollow conduit (26), and the other end of the second hollow conduit (31) is connected to the second grain collector (4).
8. The anti-splash and anti-dust device for a grain sampler according to claim 1, characterized in that, The outer wall of the diversion cylinder (2) is fixedly connected with multiple legs (41), and a support pad (32) is provided between the multiple legs (41). The support pad (32) has an opening (321) in the middle. The first grain collector (3) is set on the support pad (32), and the opening (321) is coaxially arranged with the second hollow conduit (31).
9. The anti-splash and anti-dust device for a grain sampler according to claim 1, characterized in that, The outer wall of the first cylinder (12) is provided with a plurality of latches (5), and the outer wall of the second cylinder (21) is provided with a plurality of lock seats (51). The latches (5) are adapted to the lock seats (51), and the number of latches (5) corresponds one-to-one with the number of lock seats (51).