Grinding device for traditional Chinese medicine processing

Abstract

The invention relates to the technical field of medicinal material grinding, and discloses a grinding device for traditional Chinese medicinal material processing, which comprises a circular groove body, the inner bottom surface of the circular groove body is connected with a lower grinding disc through a bolt, the inner center of the lower grinding disc is rotatably connected with a driving rod, the inner part of the lower grinding disc is connected with a cooling assembly, and the top of the driving rod is connected with a discharging assembly. The bottom of the discharging assembly is connected with an upper grinding disc through bolts, and a circular support is welded to the lower surface of the circular groove body. The gear motor serves as a power source of grinding and cooling circulation at the same time, the upper grinding disc is driven to rotate to grind medicinal materials, the cooling assembly is driven to work, in the grinding process, cooling liquid circularly flows in a vortex-shaped pipe through a cam, a plunger and other structures, heat dissipation is conducted on the lower grinding disc, and the grinding efficiency is improved. The loss of heat sensitive components of medicinal materials caused by heat generated by grinding is effectively avoided, the quality of the medicinal materials is ensured, meanwhile, the equipment cost is saved through the integrated design, and the energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medicinal material grinding, in particular to a grinding device for processing traditional Chinese medicinal materials. Background Art

[0002] In the field of traditional Chinese medicine, many Chinese medicinal materials need to be ground to fully exert their medicinal value. Grinding can make the effective ingredients of medicinal materials easier to release, improve the utilization rate of drugs, and enhance the therapeutic effect. Grinding equipment is needed to grind medicinal materials.

[0003] According to the search, the Chinese patent document, announcement number: CN109289998A, discloses a grinding device for processing Chinese medicinal materials. Through the grinder, the motor drives the sliding shaft to move back and forth inside the slide slot, thereby driving the grinding blade to grind the medicine on the grinding slot, and the counterweight block fixed on the grinding blade makes the grinding blade fit the grinding slot more closely, so that when the device is used, the medicine can be ground mechanically instead of manually, and the grinding is more fine.

[0004] However, the above-mentioned grinding device and most medicinal material grinding devices on the market are prone to generate high temperatures during the grinding process during actual use, which may destroy the heat-sensitive components in the Chinese medicinal materials and reduce the quality of the medicinal materials. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a grinding device for processing traditional Chinese medicinal materials, which has the advantages of being able to reduce the temperature during the grinding process so that the heat-sensitive components in the medicinal materials will not be lost, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grinding device for processing Chinese medicinal materials, comprising a circular trough body, the inner bottom surface of the circular trough body is connected to a lower grinding disc by bolts, the inner center of the lower grinding disc is rotatably connected to a driving rod, and the inner part of the lower grinding disc is connected to a cooling component, the top of the driving rod is connected to a material discharge component, the bottom of the material discharge component is connected to an upper grinding disc by bolts, a circular bracket is welded to the lower surface of the circular trough body, a layer plate is fixedly connected to the support foot of the circular bracket, and a reduction motor is installed on the lower surface of the layer plate;

[0009] The cooling assembly includes a vortex tube, one end of the vortex tube is plugged with a cooling box, the bottom of the cooling box is threadedly connected to a right-angle elbow, one end of the right-angle elbow is connected to a one-way valve, one end of the one-way valve is connected to a sleeve, the bottom end of the sleeve is threadedly connected to a delivery pipe, and the inside of the sleeve is slidably connected to a plunger, a connecting rod is connected to the end surface of the plunger, the top end of the connecting rod is rotatably connected to a short shaft, and the outer surface of the short shaft slides in contact with a cam.

[0010] As a preferred technical solution of the present invention, the material discharge assembly includes a transverse plate, two support rods are welded to the top surface of the transverse plate, a material storage hopper is welded to the top of the two support rods, and a material discharge pipe is integrally connected to the bottom of the material storage hopper.

[0011] As a preferred technical solution of the present invention, the bottom of the horizontal plate is connected to an upper grinding disc by bolts, and a feed hole is opened on the top surface of the upper grinding disc, and a feed pipe is inserted into the feed hole.

[0012] As a preferred technical solution of the present invention, the output shaft of the reduction motor is connected to the driving rod, a circular hole is penetrated through the lower surface of the upper grinding disc, the driving rod is inserted into the circular hole, and the top end of the driving rod is connected to the cross plate.

[0013] As a preferred technical solution of the present invention, the lower grinding disc includes a stone grinding disc and a supporting plate, the stone grinding disc and the supporting plate are connected by a plurality of bolts, the upper surface of the stone grinding disc is provided with a grinding groove, and the lower surface of the upper grinding disc is also provided with a grinding groove.

[0014] As a preferred technical solution of the present invention, a vortex groove is provided between the millstone and the supporting plate, a vortex tube is fitted in the vortex groove, and one end of the vortex tube is connected to a conveying pipe.

[0015] As a preferred technical solution of the present invention, coolant is injected into the interior of the cooling box and the vortex tube, and the cooling box is installed on the upper surface of the layer plate, and the top of the sleeve is connected to the lower surface of the layer plate by screws.

[0016] As a preferred technical solution of the present invention, the outer surface of the driving rod is fixedly connected to pulley 1, the upper surface of the layer plate is fixedly connected to a frame, the internal rotation of the frame is connected to a cam, the top of the cam is fixedly connected to pulley 2, and a synchronous belt is connected between pulley 1 and pulley 2 for transmission.

[0017] As a preferred technical solution of the present invention, an annular groove is provided on the outer surface of the cam, a short shaft is slidably connected in the annular groove, and a chute is welded on the outer wall of the circular groove body.

[0018] As a preferred technical solution of the present invention, the cooling box includes a top cover, the top of the top cover is plugged into one end of the vortex tube, and the bottom of the top cover is connected to the box body by screws, the outer wall of the box body is fixedly connected with cooling fins, and the outer surface of the box body is installed with an axial flow fan.

[0019] Compared with the prior art, the present invention provides a grinding device for processing traditional Chinese medicines, which has the following beneficial effects:

[0020] 1. The present invention realizes the integrated operation of efficient grinding and cooling. The reduction motor is used as the power source for grinding and cooling cycles at the same time, which not only drives the upper grinding disc to rotate to grind the medicinal materials, but also drives the cooling component to work. During the grinding process, the coolant is circulated in the vortex tube by using structures such as cams and plungers to dissipate heat to the lower grinding disc, effectively avoiding the loss of heat-sensitive components of the medicinal materials due to the heat generated by grinding, thereby ensuring the quality of the medicinal materials. At the same time, this integrated design saves equipment costs and reduces energy consumption.

[0021] 2. The present invention has a good cooling circulation system. The cooling box dissipates heat to the coolant through the cooling fins and the axial flow fan, so that the coolant can be recycled. During grinding, the coolant enters the sleeve through the cooling box, the right-angle elbow, and the one-way valve, and is pressed into the delivery pipe under the reciprocating motion of the plunger, and then enters the vortex tube to dissipate heat to the lower grinding disc, and then flows back to the cooling box to dissipate heat again, ensuring continuous and effective cooling of the lower grinding disc during the entire grinding process, and providing stable environmental conditions for high-quality grinding of medicinal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a front schematic diagram of the structure of the present invention;

[0024] Figure 3 It is a schematic diagram of explosion decomposition of the structure of the present invention;

[0025] Figure 4 The structure of the present invention Figure 2 A is a partial enlarged schematic diagram;

[0026] Figure 5 It is a three-dimensional schematic diagram of the cooling assembly in the structure of the present invention;

[0027] Figure 6 It is a front schematic diagram of the cooling assembly in the structure of the present invention;

[0028] Figure 7 It is an exploded schematic diagram of the sleeve, plunger, cam and other components in the structure of the present invention.

[0029] Among them: 1. circular trough; 2. lower grinding disc; 21. stone grinding disc; 22. supporting tray; 3. driving rod; 4. cooling assembly; 41. vortex tube; 42. cooling box; 421. top cover; 422. box body; 423. cooling fins; 424. axial flow fan; 43. right-angle elbow; 44. one-way valve; 45. sleeve; 46. conveying pipe; 47. plunger; 48. connecting rod; 49. short shaft; 410. cam; 5. unloading assembly; 51. cross plate; 52. support rod; 53. storage hopper; 54. unloading pipe; 6. upper grinding disc; 7. circular bracket; 8. layer plate; 9. reduction motor; 10. pulley one; 11. frame; 12. pulley two; 13. synchronous belt; 14. chute. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figure 1-Figure 7 A grinding device for processing Chinese medicinal materials, comprising a circular trough body 1, the inner bottom surface of the circular trough body 1 is connected to a lower grinding disc 2 by bolts, the inner center of the lower grinding disc 2 is rotatably connected to a driving rod 3, and the inner part of the lower grinding disc 2 is connected to a cooling component 4, the top of the driving rod 3 is connected to a material discharge component 5, the bottom of the material discharge component 5 is connected to an upper grinding disc 6 by bolts, a circular bracket 7 is welded to the lower surface of the circular trough body 1, a layer plate 8 is fixedly connected to the support foot of the circular bracket 7, and a reduction motor 9 is installed on the lower surface of the layer plate 8;

[0034] The cooling assembly 4 includes a vortex tube 41, one end of which is plugged with a cooling box 42, the bottom of the cooling box 42 is threadedly connected to a right-angle elbow 43, one end of the right-angle elbow 43 is connected to a one-way valve 44, one end of the one-way valve 44 is connected to a sleeve 45, the bottom end of the sleeve 45 is threadedly connected to a delivery pipe 46, and the inside of the sleeve 45 is slidably connected to a plunger 47, the end surface of the plunger 47 is connected to a connecting rod 48, the top end of the connecting rod 48 is rotatably connected to a short shaft 49, and the outer surface of the short shaft 49 slides in contact with a cam 410.

[0035] Furthermore, the material discharge assembly 5 includes a transverse plate 51 , two support rods 52 are welded to the top surface of the transverse plate 51 , a material storage hopper 53 is welded to the top of the two support rods 52 , and a material discharge pipe 54 is integrally connected to the bottom of the material storage hopper 53 .

[0036] Furthermore, the bottom of the transverse plate 51 is connected to the upper grinding disc 6 by bolts, and a feed hole is opened on the top surface of the upper grinding disc 6, and a feed pipe 54 is inserted into the feed hole.

[0037] By putting the sliced ​​medicinal materials in the storage hopper 53, the medicinal materials will immediately enter the discharge pipe 54. Since the discharge pipe 54 is inserted into the feed hole of the upper grinding disc 6, the medicinal materials can enter the feed hole of the upper grinding disc 6. When the upper grinding disc 6 is driven and rotated, it will drive the medicinal materials to rub against the stone grinding disc 21 in the lower grinding disc 2. In this way, the medicinal materials are rubbed into powder by the upper grinding disc 6 and the stone grinding disc 21, and the powdered medicinal materials will precipitate from the gap between the upper grinding disc 6 and the stone grinding disc 21 and fall into the circular trough body 1. In this way, the circular trough body 1 can temporarily store the ground medicinal materials, and the ground medicinal materials can be finally discharged through the chute 14. During the grinding process, the design of the discharge assembly 5 makes it convenient and stable to add medicinal materials, without the need for frequent manual addition, reducing the operating steps and improving the grinding efficiency. At the same time, the design of the discharge pipe 54 inserted into the feed hole of the upper feeding disc 6 ensures that the medicinal materials can accurately enter the grinding area to avoid the waste of medicinal materials.

[0038] Furthermore, the output shaft of the reduction motor 9 is connected to the driving rod 3 , a circular hole is formed through the lower surface of the upper grinding disc 6 , the driving rod 3 is inserted into the circular hole, and the top end of the driving rod 3 is connected to the horizontal plate 51 .

[0039] Furthermore, the lower grinding disc 2 includes a stone grinding disc 21 and a supporting plate 22, and the stone grinding disc 21 and the supporting plate 22 are connected by a plurality of bolts. A grinding groove is provided on the upper surface of the stone grinding disc 21, and a grinding groove is also provided on the lower surface of the upper grinding disc 6.

[0040] By providing a grinding groove on the upper surface of the stone millstone 21 and a grinding groove on the lower surface of the upper millstone 6, on the one hand, the contact area between the medicinal material and the upper millstone 6 and the stone millstone 21 is increased, so that the medicinal material can have more contact parts with the upper millstone 6 and the stone millstone 21 when grinding, making the grinding more complete and efficient; on the other hand, it helps to guide the grinding path of the medicinal material. The special shape and layout of the grinding groove can guide the medicinal material to move along a specific trajectory during the rotation of the upper millstone 6, so that the medicinal material is evenly ground between the upper millstone 6 and the stone millstone 21; because the stone millstone 21 and the upper millstone 6 are stone The head material is made of cast iron, and the supporting tray 22 can be made of cast iron. A number of mounting holes are opened at the bottom of the circular trough body 1 around its axial direction. By inserting the bolts into the mounting holes and then inserting them into the supporting tray 22, corresponding screw holes are opened in the stone millstone 21, so that the stone millstone 21, the supporting tray 22 and the circular trough body 1 can be connected, so that during grinding, the lower grinding disc 2 remains stationary. When the reduction motor 9 is started, it can drive the driving rod 3 to rotate, the driving rod 3 drives the horizontal plate 51 to rotate, and the horizontal plate 51 drives the upper grinding disc 6 to rotate, and the upper grinding disc 6 rotates to cooperate with the lower grinding disc 2 to remain stationary to grind the medicinal materials.

[0041] Furthermore, a vortex groove is provided between the millstone 21 and the supporting plate 22 , a vortex tube 41 is fitted in the vortex groove, and one end of the vortex tube 41 is connected to a delivery pipe 46 .

[0042] Furthermore, coolant is injected into the cooling box 42 and the vortex tube 41 , and the cooling box 42 is mounted on the upper surface of the layer plate 8 , and the top of the sleeve 45 is connected to the lower surface of the layer plate 8 by screws.

[0043] Furthermore, the outer surface of the driving rod 3 is fixedly connected to a pulley 10, the upper surface of the layer plate 8 is fixedly connected to a frame 11, the internal rotation of the frame 11 is connected to a cam 410, the top of the cam 410 is fixedly connected to a pulley 2 12, and a synchronous belt 13 is connected between the pulley 10 and the pulley 2 12 for transmission.

[0044] Furthermore, an annular groove is formed on the outer surface of the cam 410 , and a short shaft 49 is slidably connected in the annular groove. A chute 14 is welded on the outer wall of the circular groove body 1 .

[0045] Since the lower grinding disc 2 generates heat during the friction with the upper grinding disc 6, the driving rod 3 is driven to rotate by starting the reduction motor 9, which drives the pulley 10 to rotate, the pulley 10 drives the synchronous belt 13 to rotate, the synchronous belt 13 drives the pulley 2 12 to rotate, the pulley 2 12 drives the cam 410 to rotate, and the cam 410 drives the annular groove on its outer surface to rotate. Since the sliding contact short shaft 49 in the annular groove, the short shaft 49 is driven by the cam 410 to reciprocate up and down, and the short shaft 49 drives the plunger 47 to reciprocate up and down in the sleeve 45. Since coolant is placed in the cooling box 42, the coolant will flow along the right-angle bend pipe 43. And the one-way valve 44 enters into the sleeve 45. As the plunger 47 reciprocates up and down in the sleeve 45, the cooling liquid will be continuously pressed into the delivery pipe 46. Then the cooling liquid in the delivery pipe 46 enters into the vortex tube 41. Since the vortex tube 41 is arranged in the vortex groove between the supporting tray 22 and the stone millstone 21, the vortex tube 41 cooperates with the cooling liquid inside it to dissipate heat to the lower grinding disc 2, which can prevent the medicinal materials from losing heat-sensitive components during the grinding process. In addition, the overall structure can use the reduction motor 9 as both a grinding power source and a cooling cycle power source, saving costs while reducing energy consumption.

[0046] Furthermore, the cooling box 42 includes a top cover 421, the top of which is plugged into one end of the vortex tube 41, and the bottom of the top cover 421 is connected to a box body 422 by screws, a heat dissipation fin 423 is fixedly connected to the outer wall of the box body 422, and an axial flow fan 424 is installed on the outer surface of the box body 422.

[0047] As the plunger 47 continuously pressurizes the coolant, the coolant in the vortex tube 41 will flow back into the box body 422. By integrally connecting a plurality of equally spaced heat dissipating fins 423 to the outer wall of the box body 422, the heat dissipation area can be increased, thereby accelerating the dissipation of heat in the box body 422 and preliminarily realizing the heat dissipation of the coolant. In addition, by starting the axial flow fan 424, the air flow can be accelerated, so that the air flow rate passing through the heat dissipating fins 423 is accelerated, further taking away the heat, and further dissipating the heat from the box body 422. In this way, the coolant in the box body 422 is further dissipated, and the coolant can be recycled, so that the stone millstone 21 can be circulated to dissipate heat.

[0048] When in use, first put the sliced ​​medicinal materials into the storage hopper 53, and the medicinal materials immediately enter the discharge tube 54. Since the discharge tube 54 is inserted into the feed hole of the upper grinding disc 6, the medicinal materials immediately enter the feed hole of the upper grinding disc 6; then start the reduction motor 9 immediately, and its output shaft drives the driving rod 3 to rotate, and the driving rod 3 drives the horizontal plate 51 to rotate, and the horizontal plate 51 drives the upper grinding disc 6 to rotate. The upper grinding disc 6 rotates to cooperate with the stationary lower grinding disc 2 to grind the medicinal materials, and the powdered medicinal materials are precipitated from the gap between the upper grinding disc 6 and the stone grinding disc 21 and fall into the circular trough 1. Finally, the powdered medicinal materials can be manually swept with a brush to be discharged through the chute 14; when the reduction motor 9 drives the driving rod 3 to rotate, the driving rod 3 The pulley 10 on the outer surface rotates accordingly, and drives the pulley 2 12 to rotate through the synchronous belt 13, thereby driving the cam 410 to rotate. The cam 410 drives the short shaft 49 to reciprocate up and down, and the short shaft 49 drives the plunger 47 to reciprocate up and down in the sleeve 45. The coolant enters the sleeve 45 from the cooling box 42 through the right-angle elbow 43 and the one-way valve 44, enters the delivery pipe 46 under the action of the plunger 47, and then enters the vortex tube 41 to dissipate heat for the lower grinding disc 2; at the same time, as the plunger 47 continuously presses the coolant, the coolant in the vortex tube 41 flows back into the box body 422, the heat dissipation fins 423 on the outer wall of the box body 422 accelerate the heat dissipation, and the axial flow fan 424 is started to further dissipate heat, so that the coolant can be recycled.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for processing traditional Chinese medicine, comprising a circular tank (1), characterized in that: The inner bottom surface of the circular trough body (1) is connected to a lower grinding disc (2) by bolts, the inner center of the lower grinding disc (2) is rotatably connected to a driving rod (3), and the inner part of the lower grinding disc (2) is connected to a cooling assembly (4), the top of the driving rod (3) is connected to a material discharge assembly (5), and the bottom of the material discharge assembly (5) is connected to an upper grinding disc (6) by bolts, a circular bracket (7) is welded to the lower surface of the circular trough body (1), a layer plate (8) is fixedly connected to the support foot of the circular bracket (7), and a reduction motor (9) is installed on the lower surface of the layer plate (8); The cooling assembly (4) includes a vortex tube (41), one end of the vortex tube (41) is plugged with a cooling box (42), the bottom of the cooling box (42) is threadedly connected to a right-angle elbow (43), one end of the right-angle elbow (43) is connected to a one-way valve (44), one end of the one-way valve (44) is connected to a sleeve (45), the bottom end of the sleeve (45) is threadedly connected to a delivery pipe (46), and the inside of the sleeve (45) is slidably connected to a plunger (47), the end surface of the plunger (47) is connected to a connecting rod (48), the top end of the connecting rod (48) is rotatably connected to a short shaft (49), and the outer surface of the short shaft (49) is in sliding contact with a cam (410).

2. A grinding device for processing traditional Chinese medicine according to claim 1, characterized in that: The material discharge assembly (5) comprises a transverse plate (51), two support rods (52) are welded to the top surface of the transverse plate (51), a material storage hopper (53) is welded to the top of the two support rods (52), and a material discharge pipe (54) is integrally connected to the bottom of the material storage hopper (53).

3. A grinding device for processing traditional Chinese medicine according to claim 2, characterized in that: The bottom of the transverse plate (51) is connected to an upper grinding disc (6) by bolts, and a feed hole is provided on the top surface of the upper grinding disc (6), into which a feed pipe (54) is inserted.

4. A grinding device for processing traditional Chinese medicine according to claim 2, characterized in that: The output shaft of the reduction motor (9) is connected to the driving rod (3), a circular hole is formed through the lower surface of the upper grinding disc (6), the driving rod (3) is inserted into the circular hole, and the top end of the driving rod (3) is connected to the horizontal plate (51).

5. The grinding device for processing traditional Chinese medicine according to claim 1, characterized in that: The lower grinding disc (2) comprises a stone grinding disc (21) and a supporting plate (22), wherein the stone grinding disc (21) and the supporting plate (22) are connected via a plurality of bolts, a grinding groove is provided on the upper surface of the stone grinding disc (21), and a grinding groove is also provided on the lower surface of the upper grinding disc (6).

6. A grinding device for processing traditional Chinese medicine according to claim 5, characterized in that: A vortex groove is provided between the millstone (21) and the supporting plate (22), a vortex tube (41) is fitted in the vortex groove, and one end of the vortex tube (41) is connected to a conveying pipe (46).

7. A grinding device for processing traditional Chinese medicine according to claim 1, characterized in that: Cooling liquid is injected into the interior of the cooling box (42) and the vortex tube (41), and the cooling box (42) is installed on the upper surface of the layer plate (8), and the top of the sleeve (45) is connected to the lower surface of the layer plate (8) by screws.

8. The grinding device for processing traditional Chinese medicine according to claim 1, characterized in that: The outer surface of the driving rod (3) is fixedly connected to a pulley 1 (10), the upper surface of the layer plate (8) is fixedly connected to a frame (11), the interior of the frame (11) is rotatably connected to a cam (410), the top of the cam (410) is fixedly connected to a pulley 2 (12), and a synchronous belt (13) is transmission-connected between the pulley 1 (10) and the pulley 2 (12).

9. A grinding device for processing traditional Chinese medicine according to claim 1, characterized in that: The outer surface of the cam (410) is provided with an annular groove, in which a short shaft (49) is slidably connected, and a chute (14) is welded on the outer wall of the circular groove body (1).

10. The grinding device for processing traditional Chinese medicine according to claim 1, characterized in that: The cooling box (42) comprises a top cover (421), the top of the top cover (421) is plugged into one end of the vortex tube (41), and the bottom of the top cover (421) is connected to a box body (422) via screws, a heat dissipation fin (423) is fixedly connected to the outer wall of the box body (422), and an axial flow fan (424) is installed on the outer surface of the box body (422).

Images