Ink injection mechanism and auxiliary device

Abstract

The utility model relates to the technical field of stamping, in particular to an ink injection mechanism and an auxiliary device. The ink injection unit comprises a lifting assembly arranged on the inner side of the pressing assembly and an ink injection assembly arranged at the bottom of the lifting assembly; the base unit comprises a stamping assembly arranged at the bottom of the ink injection assembly; the auxiliary unit comprises an auxiliary assembly arranged on the outer side of the stamping assembly. The stamping device has the advantages that through cooperation of the first rack, the gear and the second rack, ink can be evenly supplemented to a stamp through the ink storage pipe when a file is stamped by pressing the handheld shell, and through cooperation of the ink injection pipe, the ink blocking plate and the second spring, ink is injected into the ink storage pipe 202e when the ink storage pipe 202e in the stamping device is lack of ink, so that the ink storage pipe 202e is prevented from being damaged. And through cooperation of the first telescopic rod and the second telescopic rod, it is guaranteed that the stamping device is located over the file stamping position, and repeated alignment is avoided when the same file is stamped continuously.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping, in particular to an ink filling mechanism and an auxiliary device. Background Art

[0002] As an indispensable office stationery in people's daily life, the importance of a stamper lies in its ability to efficiently complete the processes of document authentication, approval, confirmation, identification, and signing. The realization of these functions depends on its core component, that is, the seal. Inevitably, a key problem will be encountered during the use of the seal, namely the consumption and replenishment of ink. Traditional ink replenishment methods are often cumbersome and time-consuming, greatly affecting the stamping efficiency. Especially in the case of high-frequency stamping, this problem is particularly prominent.

[0003] There are two common ink replenishment methods. One is the detachable ink replenishment method. This method requires the user to first disassemble the stamper, find the position where the ink is stored, and then manually add ink. This process is prone to ink leakage or seal damage due to improper operation. Another common ink replenishment method is the method of dipping in ink paste. Such a stamper needs to carry ink paste every time it stamps. Although the operation is relatively simple, in the case of high-frequency stamping, carrying ink paste not only wastes time but also easily leads to inconsistent stamping effects due to uneven distribution of the ink paste, affecting the neatness and beauty of the document. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the problem of inconvenient and inefficient ink replenishment for stamping in the above-mentioned prior art, the present utility model is proposed.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions: The pressing unit includes a pressing component and a stamping component arranged at the bottom of the pressing component;

[0007] The ink filling unit includes a lifting component arranged inside the pressing component and an ink filling component arranged at the bottom of the lifting component.

[0008] As a preferred embodiment of an ink injection mechanism of the present utility model, the pressing assembly includes a hand-held housing, a connecting housing disposed outside the hand-held housing, two triangular sliders disposed inside the hand-held housing, a special-shaped slider disposed between the two triangular sliders, a sleeve disposed outside the special-shaped slider, a first spring disposed at the top of the sleeve, two rotating shafts disposed outside the special-shaped slider, and two torsion springs respectively disposed outside the rotating shafts.

[0009] As a preferred embodiment of an ink injection mechanism of the present utility model, the lifting assembly includes a first rack disposed inside the sleeve, a gear meshing with the first rack, a second rack meshing with the gear, a fixing rod penetrating through the center of the gear, a limiting post disposed outside the second rack, and a connecting post disposed at the bottom of the second rack.

[0010] As a preferred embodiment of an ink injection mechanism of the present utility model, the ink injection assembly includes an ink injection tube disposed at the top of the special-shaped slider, an ink outlet disposed at the bottom of the special-shaped slider, an ink blocking plate disposed at the bottom of the ink outlet, a second spring fixedly connected to the special-shaped slider and the ink blocking plate at both ends, a storage ink tube disposed inside the sleeve, and a through hole disposed near the bottom outside the storage ink tube.

[0011] As a preferred embodiment of an ink injection mechanism of the present utility model, the stamping assembly includes an ink storage groove disposed at the bottom of the storage ink tube, a stamp disposed at the bottom of the ink storage groove, and a protective housing disposed outside the ink storage groove.

[0012] As a preferred embodiment of an ink injection mechanism of the present utility model, a groove is formed at the upper end of the sleeve, the first rack is fixedly connected to the inner side of the groove, both ends of the fixing rod are fixedly connected to the inner side of the connecting housing, the bottom of the limiting post is fixedly connected to the top of the ink storage groove, and the bottom of the connecting post is fixedly connected to the outside of the storage ink tube.

[0013] As a preferred embodiment of an ink injection mechanism of the present utility model, the top of the ink injection tube penetrates through the outside of the connecting housing, a groove is formed on the outside of the connecting housing, and the ink injection tube moves inside the groove.

[0014] As a preferred embodiment of an ink injection mechanism of the present utility model, an empty groove is formed at the top of the ink storage groove, and the ink injection tube can be embedded inside the empty groove.

[0015] The beneficial effects of an ink injection mechanism of the present utility model: Through the cooperation of the first rack, gear and second rack, while pressing the handheld housing to stamp a document, the ink storage tube evenly supplies ink to the stamp. Through the cooperation of the ink injection tube, ink blocking plate and second spring, when the ink storage tube inside the stamper is short of ink, ink is injected into the ink storage tube.

[0016] In view of the fact that during the actual use process, there is also a problem that displacement is likely to occur during stamping.

[0017] To solve the above technical problems, the present utility model also provides the following technical solution: An auxiliary device includes an auxiliary unit, which includes a connection component arranged outside the stamping component and a bearing component arranged at the bottom of the connection component.

[0018] As a preferred scheme of the auxiliary device of the present utility model, among them: The connection component includes a limit frame arranged outside the stamping component and a first telescopic rod arranged at one end of the limit frame.

[0019] As a preferred scheme of the auxiliary device of the present utility model, among them: The bearing component includes a second telescopic rod arranged at the bottom of the first telescopic rod, a bottom plate arranged at the bottom of the second telescopic rod, and a placement groove arranged at the top of the bottom plate.

[0020] The beneficial effects of the auxiliary device of the present utility model: The position of the text of the stamper can be observed through the limit frame, which can ensure that the stamped seal is square, horizontal and beautiful, reducing the error caused by aligning the handheld stamper. Through the cooperation of the first telescopic rod and the second telescopic rod, it is ensured that the stamper is directly above the document stamping position, avoiding the need to repeat alignment when continuously stamping the same document. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0022] Figure 1 It is a schematic diagram of the overall mechanism of an ink injection mechanism.

[0023] Figure 2 It is a schematic diagram of the pressing component and partial structure enlargement of an ink injection mechanism.

[0024] Figure 3 It is a schematic diagram of the structure of the stamping component of an ink injection mechanism.

[0025] Figure 4 It is a schematic diagram of the structure of the lifting component of an ink injection mechanism.

[0026] Figure 5 It is a schematic structural diagram of an ink filling component of an ink filling mechanism.

[0027] Figure 6 It is a schematic overall structure diagram of an auxiliary device.

[0028] Figure 7 It is a schematic specific structural diagram of the auxiliary device from another angle. Specific implementation manners

[0029] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the specific implementation manners of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0030] In the following description, many specific details are set forth in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0031] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0032] Embodiment 1

[0033] Referring to Figures 1 to 5 , which is the first embodiment of the present utility model. This embodiment provides an ink filling mechanism, which can realize rapid ink filling inside the stamper and evenly replenish ink to the stamp.

[0034] Specifically, the pressing unit 100 includes a pressing component 101 and a stamping component 102 disposed at the bottom of the pressing component 101;

[0035] The ink filling unit 200 includes a lifting component 201 disposed inside the pressing component 101 and an ink filling component 202 disposed at the bottom of the lifting component 201.

[0036] It should be noted that the lifting component 201 is slidably connected to the pressing component 101, the ink filling component 202 is slidably connected to the lifting component 201, and the stamping component 102 is slidably connected to the ink filling component 202.

[0037] In use, the staff applies pressure to the top of the pressing component 101, causing the pressing component 101 to slide inside the lifting component 201. The movement of the lifting component 201 drives the ink filling component 202 to move towards the inside of the stamping component 102. When the ink filling component 202 moves to the inside of the stamping component 102, ink required for the stamp is replenished.

[0038] In summary, the beneficial effects of an ink filling mechanism are as follows: through the cooperation of the first rack 201a, the gear 201b and the second rack 201c, while pressing the handheld housing 101a to stamp a document, the ink storage tube 202e evenly replenishes ink to the stamp 102b. Through the cooperation of the ink filling tube 202a, the ink blocking plate 202c and the second spring 202d, when the ink storage tube 202e inside the stamper is short of ink, ink is filled into the ink storage tube 202e.

[0039] Embodiment 2

[0040] Refer to Figures 1 to 5 , which is the second embodiment of the present utility model. This embodiment provides an ink filling mechanism that can quickly fill ink inside the stamper and evenly replenish ink to the stamp.

[0041] Furthermore, the pressing component 101 includes a handheld housing 101a, two sets of triangular sliders 101b arranged inside the handheld housing 101a, a special-shaped slider 101c arranged between the two sets of triangular sliders 101b, a sleeve 101d arranged outside the special-shaped slider 101c, a first spring 101e arranged at the top of the sleeve 101d, a rotating shaft 101f arranged outside the special-shaped slider 101c, and two sets of torsion springs 101g respectively arranged outside the rotating shaft 101f. Among them, the triangular slider 101b is fixedly connected to the inside of the handheld housing 101a, the outside of the special-shaped slider 101c is slidably connected to the outside of the triangular slider 101b, the sleeve 101d is provided with a through groove, the special-shaped slider 101c passes through the through groove and is slidably connected to the sleeve 101d, both ends of the first spring 101e are fixedly connected to the top of the sleeve 101d and the inside of the handheld housing 101a respectively, the two sets of rotating shafts 101f are placed opposite to each other outside the special-shaped slider 101c, both ends of the rotating shaft 101f are fixedly connected to the outside of the special-shaped slider 101c and the inside of the sleeve 101d respectively, and the torsion spring 101g is fixedly connected to the outside of the rotating shaft 101f.

[0042] Further, the lifting assembly 201 includes a first rack 201a disposed inside the sleeve 101d, a gear 201b meshing with the first rack 201a, a second rack 201c meshing with the gear 201b, a fixing rod 201d penetrating through the center of the gear 201b, a limiting post 201e disposed outside the second rack 201c, a connecting housing 201f disposed outside the limiting post 201e, and a connecting column 201g disposed at the bottom of the second rack 201c. Among them, a groove is formed at the upper end of the sleeve 101d, and the first rack 201a is fixedly connected to the inner side of the empty groove. The fixing rod 201d is hinged to the gear 201b. The inner side of the limiting post 201e is slidably connected to the outer side of the second rack 201c, and the outer side of the limiting post 201e is slidably connected to the connecting housing 201f. The top of the connecting column 201g is fixedly connected to the bottom of the second rack 201c. A groove is formed at the lower end of the sleeve 101d, so that the connecting column 201g can continue to move along the groove during lifting and lowering.

[0043] It should be noted that the connecting housing 201f is slidably connected to the handheld housing 101a.

[0044] Further, the ink injection assembly 202 includes an ink injection tube 202a disposed at the top of the special-shaped slider 101c, an ink outlet 202b disposed at the bottom of the special-shaped slider 101c, an ink blocking plate 202c disposed at the bottom of the ink outlet 202b, a second spring 202d with both ends fixedly connected to the special-shaped slider 101c and the ink blocking plate 202c respectively, an ink storage tube 202e disposed inside the sleeve 101d, and a through hole 202f penetrating through the outside of the ink storage tube 202e near the bottom. Among them, the ink injection tube 202a is fixedly connected to the inside of the special-shaped slider 101c. The bottom of the ink injection tube 202a is sleeved with the ink outlet 202b. A buckle is disposed at the top of the ink blocking plate 202c, and the buckle is movably connected to the ink outlet 202b. One end of the ink blocking plate 202c is fixedly connected to the outside of the sleeve 101d. A groove is formed on the outside of the special-shaped slider 101c, so that the ink blocking plate 202c can continue to move along the groove during movement. The ink storage tube 202e is sleeved with the inside of the sleeve 101d. There are multiple groups of through holes 202f, which are evenly arranged at the bottom of the ink storage tube 202e, so that the ink flows out evenly.

[0045] Further, the stamping assembly 102 includes an ink storage groove 102a disposed at the bottom of the ink storage tube 202e, a stamp 102b disposed at the bottom of the ink storage groove 102a, and a protective housing 102c disposed outside the ink storage groove 102a. Among them, the stamp 102b is fixedly connected to the ink storage groove 102a. The protective housing 102c is fixedly connected to the connecting housing 201f. The bottom of the limiting post 201e is fixedly connected to the top of the ink storage groove 102a.

[0046] In use, the staff places the stamper above the document to be stamped, presses the handheld housing 101a, and the pressure drives the handheld housing 101a to move downward. The movement of the handheld housing 101a drives the triangular slider 101b to move downward. The movement of the triangular slider 101b drives the special-shaped slider 101c to move upward. The movement of the special-shaped slider 101c drives the sleeve 101d to move upward. The movement of the sleeve 101d drives the first rack 201a to move upward. The movement of the first rack 201a drives the gear 201b to rotate clockwise. The rotation of the gear 201b drives the second rack 201c to move downward. The movement of the second rack 201c drives the connecting column 201g to move downward. The movement of the connecting column 201g drives the ink storage tube 202e to move downward. The movement of the ink storage tube 202e drives the through hole 202f to move downward. At this time, the through hole 202f moves into the ink storage groove 102a. The ink inside the ink storage tube 202e flows into the ink storage groove 102a through the through hole 202f to evenly replenish the ink for the stamp. At the same time, the movement of the through hole 202f drives the stamp 102b to move downward. The stamp 102b moves to the bottom of the protective housing 102c to stamp the document. When the stamping is completed, the pressure applied to the handheld housing 101a is removed. At this time, the first spring 101e loses pressure and returns to its original position due to its own elastic force. The movement of the first spring 101e drives the handheld housing 101a to move upward. The movement of the handheld housing 101a drives the triangular slider 101b to move upward. The movement of the triangular slider 101b drives the special-shaped slider 101c to move to its original position. The torsion spring 101f limits the special-shaped slider 101c to prevent it from over-resetting. The movement of the special-shaped slider 101c drives the sleeve 101d to move downward. The movement of the sleeve 101d drives the first rack 201a to move downward. The movement of the first rack 201a drives the gear 201b to rotate counterclockwise. The rotation of the gear 201b drives the second rack 201c to move upward. The movement of the second rack 201c drives the connecting column 201g to move upward. The movement of the connecting column 201g drives the ink storage tube 202e to move upward. The movement of the ink storage tube 202e drives the through hole 202f to move upward. At this time, the through hole 202f moves into the sleeve 101d and the ink no longer flows out.

[0047] When the ink in the ink storage tube 202e is insufficient, ink needs to be added through the ink injection tube 202a. The staff adds ink to the ink injection tube 202a. When the special-shaped slider 101c moves upward to drive the sleeve 101d to move upward, the movement of the sleeve 101d drives the ink storage tube 202e to move synchronously in the same direction. At the same time, the movement of the sleeve 101d drives the ink blocking plate 202c to move towards the inside of the special-shaped slider 101c. At this time, the ink outlet 202b is sleeved on the top of the ink storage tube 202e, and the ink in the ink injection tube 202a is injected into the ink storage tube 202e. When the special-shaped slider 101c returns to the initial position, the movement of the special-shaped slider 101c drives the ink outlet 202b to move synchronously in the same direction. Due to its own elastic force, the second spring 202d drives the ink blocking plate 202c to return to the initial position, and the buckle on the top of the ink blocking plate 202c is inserted into the ink outlet 202b to prevent ink leakage.

[0048] In summary, the beneficial effect of an ink injection mechanism is that through the cooperation of the first rack 201a, the gear 201b and the second rack 201c, while pressing the handheld housing 101a to stamp a document, the ink storage tube 202e evenly supplies ink to the stamp 102b. Through the cooperation of the ink injection tube 202a, the ink blocking plate 202c and the second spring 202d, when the ink storage tube 202e inside the stamper is short of ink, ink is injected into the ink storage tube 202e.

[0049] Embodiment 3

[0050] Refer to Figures 6 to 7 , which is the third embodiment of the present invention. This embodiment further provides an auxiliary device, which can ensure that the stamped seal is square, horizontal and beautiful, reduces the error caused by aligning the handheld stamper, and avoids the need to repeat alignment when continuously stamping the same document.

[0051] Specifically, an auxiliary device includes an ink injection mechanism as in Embodiment 1 or Embodiment 2, and

[0052] an auxiliary unit 300, including a connection component 301 arranged outside the stamping component 102, and a bearing component 302 arranged at the bottom of the connection component 301.

[0053] Furthermore, the connection component 301 includes a limit frame 301a arranged outside the stamping component 102, and a first telescopic rod 301b arranged at one end of the limit frame 301a.

[0054] Furthermore, the bearing component 302 includes a second telescopic rod 302a arranged at the bottom of the first telescopic rod 301b, a bottom plate 302b arranged at the bottom of the second telescopic rod 302a, and a placement groove 302c arranged at the top of the bottom plate 302b.

[0055] It should be noted that the limit frame 301a is movably connected to the stamping assembly 102. The first telescopic rod 301b is fixedly connected to the limit frame 301a. The second telescopic rod 302a is fixedly connected to the first telescopic rod 301b. The bottom plate 302b is fixedly connected to the second telescopic rod 302a. A buckle and a buckle groove are provided inside the first telescopic rod 301b and the second telescopic rod 302a to achieve the telescopic function.

[0056] During use, the staff places the stamper into the limit frame 301a, places the document inside the placement groove 302c, adjusts the first telescopic rod 301b to make the stamper directly above the position to be stamped, adjusts the second telescopic rod 302a to place the stamper at an appropriate height above the position to be stamped. When the position of the stamper is adjusted, press the pressing unit 100 to perform stamping.

[0057] In summary, the beneficial effects of an auxiliary device are as follows: the position of the text of the stamper can be observed through the limit frame 301a, which can ensure that the stamped seal is square, horizontal and beautiful, reducing the error caused by manually aligning the stamper. Through the cooperation of the first telescopic rod 301b and the second telescopic rod 302a, it is ensured that the stamper is directly above the document stamping position, avoiding the need to repeat alignment when continuously stamping the same document.

[0058] Importantly, it should be noted that the structures and arrangements of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application, such as the ink filling mechanism, installation arrangement, use of materials, color, orientation changes, etc. For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature, number or position of discrete elements can be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the functions described herein, and not only structurally equivalent but also equivalent structures. Without departing from the scope of the present utility model, other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangements of the exemplary embodiments. Therefore, the present utility model is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0059] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments, such as the ink filling mechanism, may be described.

[0060] It should be understood that, in the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, the development efforts will be routine work of design, fabrication, and production.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An ink injection mechanism, characterized in that: Comprising, A pressing unit (100), including a pressing component (101), and an ink stamping component (102) provided at the bottom of the pressing component (101); An ink filling unit (200), including a lifting component (201) provided inside the pressing component (101), and an ink filling component (202) provided at the bottom of the lifting component (201).

2. The ink filling mechanism according to claim 1, characterized in that: The pressing component (101) includes a hand-held housing (101a), two sets of triangular sliders (101b) provided inside the hand-held housing (101a), a special-shaped slider (101c) provided between the two sets of triangular sliders (101b), a sleeve (101d) provided outside the special-shaped slider (101c), a first spring (101e) provided at the top of the sleeve (101d), two sets of rotating shafts (101f) provided outside the special-shaped slider (101c), and two sets of torsion springs (101g) respectively provided outside the rotating shafts (101f).

3. The ink filling mechanism according to claim 2, wherein: The lifting component (201) includes a first rack (201a) provided inside the sleeve (101d), a gear (201b) meshing with the first rack (201a), a second rack (201c) meshing with the gear (201b), a fixing rod (201d) penetrating through the center of the gear (201b), a limiting post (201e) provided outside the second rack (201c), a connecting housing (201f) provided outside the limiting post (201e), and a connecting column (201g) provided at the bottom of the second rack (201c).

4. The ink filling mechanism according to claim 3, characterized in that: The ink filling component (202) includes an ink filling tube (202a) provided at the top of the special-shaped slider (101c), an ink outlet (202b) provided at the bottom of the special-shaped slider (101c), an ink blocking plate (202c) provided at the bottom of the ink outlet (202b), a second spring (202d) with both ends fixedly connected to the special-shaped slider (101c) and the ink blocking plate (202c) respectively, an ink storage tube (202e) provided inside the sleeve (101d), and a through hole (202f) provided through the outside of the ink storage tube (202e) near the bottom.

5. The ink filling mechanism according to claim 4, characterized in that: The ink stamping component (102) includes an ink storage groove (102a) provided at the bottom of the ink storage tube (202e), a seal (102b) provided at the bottom of the ink storage groove (102a), and a protective housing (102c) provided outside the ink storage groove (102a).

6. The ink filling mechanism according to any one of claims 1 to 5, characterized in that: A groove is formed at the upper end of the sleeve (101d), and the first rack (201a) is fixedly connected to the inside of the groove.

7. The ink filling mechanism according to claim 6, characterized in that: An empty groove is provided at the top of the ink storage groove (102a), and the ink filling tube (202a) can be embedded inside the empty groove.

8. An auxiliary device, characterized in that: Comprising the ink filling mechanism according to any one of claims 1 to 7; and, An auxiliary unit (300), including a connecting component (301) provided outside the ink stamping component (102), and a bearing component (302) provided at the bottom of the connecting component (301).

9. The auxiliary device according to claim 8, characterized in that: The connecting component (301) includes a limiting frame (301a) arranged outside the stamping component (102), and a first telescopic rod (301b) arranged at one end of the limiting frame (301a).

10. The auxiliary device according to claim 9, wherein: The carrying component (302) includes a second telescopic rod (302a) arranged at the bottom of the first telescopic rod (301b), a bottom plate (302b) arranged at the bottom of the second telescopic rod (302a), and a placement groove (302c) arranged at the top of the bottom plate (302b).

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