Pharmaceutical drying oven

Abstract

According to the pharmaceutical drying oven, a first medicine placing plate and a second medicine placing plate are supported by arranging a plate support on a placing plate, the second medicine placing plate is connected with at least one of the plate support and the first medicine placing plate through a switching mechanism, and relative movement of the first medicine placing plate and the second medicine placing plate can be achieved through the switching mechanism; the inserting rods are inserted into the corresponding containing holes, so that the first medicine containing plate and the second medicine containing plate are switched between the medicine preparing state and the medicine taking state, in the medicine preparing state, the inserting rods and the corresponding containing holes are staggered, the inserting rods support the first medicine containing plate and carry tablets in the containing holes, and in the medicine taking state, the inserting rods are inserted into the corresponding containing holes so that the tablets in the containing holes can be ejected out. On the basis that tablets are limited and prevented from deviating in the drying process, by switching the relative position relation between the first medicine containing plate and the second medicine containing plate, the tablets in the containing holes are ejected out through the inserting rods, material taking operation is convenient, and the working efficiency is improved. The problem that tablet taking operation is inconvenient for tablet limiting concave holes existing in an existing drying oven is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and relates to pharmaceutical equipment, in particular to a pharmaceutical oven capable of being used for drying and shaping of nicorandil tablets. BACKGROUND

[0002] Nicorandil tablets are medical tablets, and the main indication is angina pectoris. When the nicorandil tablets are prepared, an oven is often used to complete the drying and shaping operation of the tablets. The oven can control the water content in the nicorandil tablets, thereby meeting the requirements of production and preparation.

[0003] When the existing oven is used, in order to prevent the placement position of the tablets from deviating, a limiting concave hole of a corresponding specification is often formed on the placement plate, and the tablets to be dried are placed in the limiting concave hole. Although the limiting concave hole can limit the tablets, the tablets are inconvenient to take out due to the influence of the limiting concave hole, thereby reducing the efficiency of production and preparation of the tablets.

[0004] Therefore, it is necessary to provide a novel pharmaceutical oven to solve the problem that the limiting concave hole of the existing oven is inconvenient for tablet taking operation, thereby reducing the efficiency of production and preparation of the tablets. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a pharmaceutical oven capable of being used for drying and shaping of nicorandil tablets to solve the problem that the limiting concave hole of the existing oven is inconvenient for tablet taking operation, thereby reducing the efficiency of production and preparation of the tablets.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme.

[0007] The utility model provides a pharmaceutical oven, which comprises:

[0008] A box shell is provided with an openable and closable box door.

[0009] A placement rack is arranged on the inner wall of the box shell.

[0010] The placing plate comprises a plate support, a medicine placing plate one and a medicine placing plate two. The plate support is arranged on the placing rack. The medicine placing plate one is arranged above the plate support and is movably connected with the plate support. The medicine placing plate one is provided with placing holes for placing medicine tablets. The medicine placing plate two is arranged between the plate support and the medicine placing plate one. The upper surface of the medicine placing plate two is provided with a plurality of inserting rods matched with the placing holes. The medicine placing plate two is connected with at least one of the plate support and the medicine placing plate one through a switching mechanism. The switching mechanism can drive the medicine placing plate one and the medicine placing plate two to relatively move, so that the medicine placing plate one and the medicine placing plate two are switched between a medicine preparing state and a medicine taking state. In the medicine preparing state, the inserting rods are misaligned with the corresponding placing holes. The inserting rods support the medicine placing plate one and carry the medicine tablets in the placing holes. In the medicine taking state, the inserting rods are inserted into the corresponding placing holes to push out the medicine tablets in the placing holes.

[0011] Preferably, the medicine placing plate two is fixed on the plate support. The switching mechanism can drive the medicine placing plate one to relatively move with respect to the medicine placing plate two, so that the medicine placing plate one and the medicine placing plate two are switched between the medicine preparing state and the medicine taking state.

[0012] Preferably, the upper surface of the plate support is provided with a groove matched with the medicine placing plate two. The medicine placing plate two is embedded in the groove. The inserting rods protrude from the upper surface of the plate support. The medicine placing plate one covers the upper surface of the plate support.

[0013] Preferably, the switching mechanism comprises:

[0014] An adjusting rod, whose first end is connected with the medicine placing plate two and whose second end penetrates through the side wall of the groove on the plate support and extends out of the groove;

[0015] A connecting plate arranged on the upper surface of the second end of the adjusting rod;

[0016] A clamping plate, whose top is connected with the connecting plate through a spring one. The top end of the clamping plate is connected with the medicine placing plate one. The bottom of the clamping plate is movably connected with the second end of the adjusting rod.

[0017] Preferably, the bottom of the clamping plate is provided with a slot. The second end of the adjusting rod is movably arranged in the slot. Pulling the bottom of the clamping plate can make the clamping plate rotate with respect to the second end of the adjusting rod.

[0018] Preferably, the side wall of the groove is provided with an installation groove with an upward opening. The connecting section is arranged between the first end and the second end of the adjusting rod. The connecting section is arranged in the installation groove. The width of the second end of the adjusting rod is greater than the width of the connecting section, so as to limit the installation position of the adjusting rod in the installation groove.

[0019] Preferably, the top end of the clamping plate is provided with a protrusion, the first placement plate is provided with a connecting block, and the top end of the clamping plate is clamped with the connecting block through the protrusion.

[0020] Preferably, the switching mechanism is provided with at least two groups.

[0021] Preferably, the placement racks are arranged in pairs in the box shell, and any pair of the placement racks are symmetrically arranged on the left and right sides of the box shell.

[0022] Preferably, any of the placement racks is detachably installed in the box shell through a placement rack mounting structure, and the placement rack mounting structure comprises:

[0023] a plug-in part provided at the bottom of the placement rack, wherein a downward plug-in slot is formed at the bottom of the plug-in part;

[0024] a support rod, a first end of which is connected with the inner wall of the box shell;

[0025] a stop ring movably sleeved on the support rod, wherein a plug-in space is formed between the stop ring and the first end of the support rod, and the placement rack is plug-in installed on the support rod in the plug-in space;

[0026] a second spring sleeved outside the support rod and located between the stop ring and a second end of the support rod, wherein the second spring can exert a spring force on the stop ring to tightly press the plug-in part on the support rod.

[0027] Compared with the prior art, the utility model discloses the following technical effects:

[0028] The utility model discloses a pharmaceutical oven, the structure is novel and reasonable, and the placement plate is supported by the plate support and is supported by the first placement plate and the second placement plate, and the second placement plate is connected with at least one of the plate support and the first placement plate through the switching mechanism. The relative movement of the first placement plate and the second placement plate can be realized through the switching mechanism, so that the first placement plate and the second placement plate are switched between the medicine preparation state and the medicine taking state. In the medicine preparation state, the plug rod is misaligned with the corresponding placement hole, the plug rod supports the first placement plate, and supports the tablets in the placement hole. In the medicine taking state, the plug rod is inserted into the corresponding placement hole to eject the tablets in the placement hole. The novel structure of the placement plate can ensure the limitation of the tablets and prevent the position deviation of the tablets in the drying process. By switching the relative position relationship between the first placement plate and the second placement plate, the tablets in the placement hole are ejected by the plug rod, the convenient taking operation is realized, the medicine taking efficiency and the whole production efficiency of the tablets are improved, and the problem that the tablet limiting concave hole of the existing oven is not convenient for the tablet taking operation is solved, thereby reducing the production efficiency of the tablets.

[0029] The pharmaceutical oven can be applied to, but is not limited to, drying and shaping of nicorandil tablets.

[0030] In some technical solutions disclosed by the utility model, the placing rack is inserted and assembled on the supporting rod through the slot on the insert, and the insert can be clamped by spring two and the abutting ring on the supporting rod, so that the stable connection of the placing rack on the supporting rod is realized, and the supporting operation of the placing rack on the acting position of the box shell is completed; meanwhile, spring two can realize the elastic regulation effect of the abutting ring on the acting position of the supporting rod, and the insert can be conveniently disassembled and replaced on the supporting rod, and the use performance is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0032] Figure 1 The whole structure schematic diagram of the pharmaceutical oven disclosed by the embodiments of the utility model is shown in the figure.

[0033] Figure 2 The installation schematic diagram of the placing plate in the pharmaceutical oven disclosed by the embodiments of the utility model is shown in the figure.

[0034] Figure 3 The enlarged structure schematic diagram of A in the figure is shown in the figure. Figure 2 The enlarged structure schematic diagram of B in the figure is shown in the figure.

[0035] Figure 4 The structure exploded view of the placing plate in the pharmaceutical oven disclosed by the embodiments of the utility model is shown in the figure.

[0036] Figure 5 The enlarged structure schematic diagram of A in the figure is shown in the figure. Figure 4 The enlarged structure schematic diagram of B in the figure is shown in the figure.

[0037] In the figure, the reference signs are:

[0038] 100, pharmaceutical oven;

[0039] 1, box shell;

[0040] 2, box door;

[0041] 3, placing plate; 31, plate support; 32, medicine placing plate one; 321, placing hole; 33, medicine placing plate two; 331, inserting rod; 34, handle; 35, adjusting rod; 36, clamping plate; 37, connecting plate; 38, spring one; 39, mounting slot;

[0042] 4, placing rack;

[0043] 5, rack mounting structure; 51, plug-in; 52, slot; 53, support rod; 54, spring two; 55, ring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0045] The pharmaceutical oven can be used for drying and shaping of nicorandil tablets, and solves the problem that the existing oven is inconvenient for tablet taking operation due to the limiting concave hole, thereby improving the production efficiency of the tablets.

[0046] In order to make the above-mentioned purposes, characteristics and advantages of the present application more apparent, obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0047] As Figures 1-5As shown, the embodiment proposes a pharmaceutical oven 100, which comprises a box shell 1, a placing rack 4 and a placing plate 3. The box shell 1 can be a conventional oven box shell and has a conventional oven drying function. The box shell 1 is further provided with an openable and closable box door 2 in front. The placing rack 4 is arranged on the inner wall of the box shell 1. The placing plate 3 comprises a plate support 31, a medicine placing plate one 32 and a medicine placing plate two 33. The plate support 31 is arranged on the placing rack 4 and supports the entire placing plate 3. The medicine placing plate one 32 is located above the plate support 31 and is movably connected with the plate support 31. The medicine placing plate one 32 is provided with placing holes 321 for placing medicine tablets. The medicine placing plate two 33 is installed between the plate support 31 and the medicine placing plate one 32. The upper surface of the medicine placing plate two 33 is provided with a plurality of insertion rods 331 matched with the placing holes 321. The medicine placing plate two 33 is connected with at least one of the plate support 31 and the medicine placing plate one 32 through a switching mechanism. The switching mechanism can drive the medicine placing plate one 32 and the medicine placing plate two 33 to move relatively, so as to switch the medicine placing plate one 32 and the medicine placing plate two 33 between a medicine preparation state and a medicine taking state. In the medicine preparation state, the insertion rods 331 are misaligned with the corresponding placing holes 321. The insertion rods 331 support the medicine placing plate one 32 and carry the medicine tablets in the placing holes 321. In the medicine taking state, the insertion rods 331 are inserted into the corresponding placing holes 321 to push out the medicine tablets in the placing holes 321. Through the novel structure design of the placing plate 3, the relative position relationship between the medicine placing plate one and the medicine placing plate two can be switched. The medicine tablets in the placing holes are pushed out by the insertion rods, the medicine taking operation is facilitated, the medicine taking efficiency and the entire production and preparation efficiency of the medicine tablets are improved, and the problem that the medicine tablet limiting concave holes of the existing oven are not convenient for medicine tablet taking operation is solved, thereby improving the production and preparation efficiency of the medicine tablets.

[0048] Specifically, in the embodiment, the medicine placing plate two 33 is preferably fixed on the plate support 31. The switching mechanism can drive the medicine placing plate one 32 to move relative to the medicine placing plate two 33, so as to switch the medicine placing plate one 32 and the medicine placing plate two 33 between the medicine preparation state and the medicine taking state.

[0049] Specifically, in the embodiment, the upper surface of the plate support 31 is provided with a groove matched with the medicine placing plate two 33. The medicine placing plate two 33 is embedded in the groove, and the insertion rods 331 protrude from the upper surface of the plate support 31. The medicine placing plate one 32 covers the upper surface of the plate support 31.

[0050] In this embodiment, in order to facilitate the overall placement of the board 3 on the shelf 4 to be taken or pushed and pulled, preferably, a handle 34 is also provided on the board holder 31. Specifically, preferably, the board holder 31 is a "concave" type plate with a notch at the front end, and the groove thereon is located on one side of the notch and is rectangular, and correspondingly, the second medicine placing plate 33 is also rectangular and cannot move in the groove; at the same time, preferably, the first medicine placing plate 32 is a "concave" type plate with the same shape as the board holder 31, and after assembly, the outer contour of the first medicine placing plate 32 is aligned with the outer contour of the board holder 31.

[0051] Specifically, in this embodiment, as shown in Figure 4 and Figure 5 , preferably, the switching mechanism includes an adjusting rod 35, a connecting plate 37 and a clamping plate 36, wherein the first end of the adjusting rod 35 is connected with the second medicine placing plate 33, the second end of the adjusting rod 35 penetrates through the side wall of the groove on the board holder 31 and extends out of the groove; the connecting plate 37 is arranged on the upper surface of the second end of the adjusting rod 35; the top of the clamping plate 36 is connected with the connecting plate 37 through a spring 1, and the top end of the clamping plate 36 is connected with the first medicine placing plate 32, and the bottom of the clamping plate 36 is movably connected with the second end of the adjusting rod 35.

[0052] Specifically, in this embodiment, as shown in Figure 4 and Figure 5 , preferably, the bottom of the clamping plate 36 is provided with a slot, and the second end of the adjusting rod 35 movably penetrates into the slot, and pulling the bottom of the clamping plate 36 can make the clamping plate 36 rotate relative to the second end of the adjusting rod 35.

[0053] Specifically, in this embodiment, as shown in Figure 4 and Figure 5 , preferably, the front side wall of the groove on the board holder 31 (located at the notch position of the board holder 31) is provided with a mounting slot 39 with an upward opening; a connecting section is arranged between the first end and the second end of the adjusting rod 35, and the connecting section is clamped into the mounting slot 39, and at the same time, the width of the second end of the adjusting rod 35 is greater than the width of the connecting section, so that the installation position of the adjusting rod 35 in the mounting slot 39 can be limited by the second end of the adjusting rod 35, preventing the adjusting rod 35 from moving back and forth relative to the mounting slot 39.

[0054] Specifically, in this embodiment, as shown in Figure 4 and Figure 5 , preferably, the top end of the clamping plate 36 is provided with a protrusion, and the notch position of the first medicine placing plate 32 is provided with a connecting block (usually a plate), and the connecting block is provided with a recessed card matched with the protrusion, and the top end of the clamping plate 36 is clamped with the recessed card of the connecting block through the protrusion, so as to realize the connection between the clamping plate 36 and the first medicine placing plate 32. The connecting block on the first medicine placing plate 32 is generally preferably integrally formed with the first medicine placing plate 32. The above-mentioned clamping plate 36 is preferably an L-shaped clamping plate, as shown in Figure 5 .

[0055] Specifically, in the embodiment, the switching mechanism is preferably provided with at least two groups at the notch position of the plate holder 31.

[0056] Specifically, in the embodiment, the aforementioned placement hole 321 is generally preferably a circular hole, and the insertion rod 331 can be a prism or a cylinder, and the outer diameter of the insertion rod 331 is smaller than the inner diameter of the placement hole 321.

[0057] Specifically, in the embodiment, as shown in Figure 2 and Figure 3 The placement racks 4 are arranged in pairs in the box shell 1, and any pair of placement racks 4 is symmetrically arranged on the left and right sides of the box shell 1, and a plurality of pairs of placement racks 4 are arranged in the box shell 1 along the height direction.

[0058] Specifically, in the embodiment, any placement rack 4 is preferably detachably mounted in the box shell 1 through the placement rack mounting structure 5, as shown in Figure 3 The placement rack mounting structure 5 includes an insert 51, a support rod 53, a stop ring 55, and a spring 54, the insert 51 is arranged at the bottom of the placement rack 4, and a downward insertion slot 52 is formed at the bottom of the insert 51; the first end of the support rod 53 is connected to the inner wall of the box shell 1, the second end of the support rod 53 has a limiting end plate, that is, the axial section of the entire support rod 53 is in the shape of "T", the stop ring 55 is movably sleeved on the support rod 53, and the space for the insert 51 is formed between the stop ring 55 and the first end of the support rod 53, the placement rack 4 is inserted and mounted on the support rod 53 in the space for the insert 51 through the insert 51, and the spring 54 is sleeved outside the support rod 53 and located between the stop ring 55 and the second end of the support rod 53, the spring 54 can exert a spring force on the stop ring 55 to tightly press the insert 51 on the support rod 53. In use, the placement rack 4 is inserted and mounted on the support rod 53 through the insertion slot 52 on the insert 51, and the spring 54 and the stop ring 55 on the support rod 53 can be used to tightly press the insert 51, realizing the stable connection of the placement rack 4 on the support rod 53, thereby completing the supporting operation of the placement rack 4 at the working position on the box shell 1; at the same time, the spring 54 can realize the elastic regulation effect of the stop ring 55 at the working position on the support rod 53, facilitating the disassembly and replacement of the insert 51 on the support rod 53, and having stronger use performance.

[0059] The above oven can be used for drying and shaping of various different function tablets. The working process and principle of the above pharmaceutical oven 100 will be specifically described below by taking the drying and shaping of nicorandil tablets as an example:

[0060] In the initial state, the medicine placing plate one 32 and the medicine placing plate two 33 of the placement plate 3 are in the pharmaceutical state.

[0061] The nicorandil tablets to be dried are placed in the placing holes 321, and then the two ends of the placing plate 3 are placed on the placing frame 4, and the placing plate 3 is supported by the placing frame 4. After all the placing plates 3 are placed in the box shell 1 layer by layer, the box door 2 is closed, and the heating element arranged on the box shell 1 is started to dry and shape the nicorandil tablets on each layer of the placing plate 3 in the box shell 1. The heating element arranged on the box shell 1 is prior art, and the drying principle of the entire oven is prior art, which will not be repeated here.

[0062] After drying, the bottom of the clamping plate 36 is pulled to rotate the clamping plate 36 relative to the adjusting rod 35, and the top of the clamping plate 36 drives the medicine placing plate one 32 to move relative to the medicine placing plate two 33 towards the handle 34. In this process, the medicine placing plate one 32 moves downward relative to the medicine placing plate two 33 (spring one 38 is stretched), until the inserting rod 331 on the medicine placing plate two 33 is inserted into the placing hole 321 of the medicine placing plate one 32. At this time, the medicine placing plate one 32 and the medicine placing plate two 33 of the placing plate 3 are switched to the medicine taking state, that is, the inserting rod 331 pushes the tablets in the placing hole 321 upward, so that the tablets are all located outside the placing hole 321, or at least the top of the tablets protrudes outside the placing hole 321, facilitating the taking operation.

[0063] After all the dried and shaped tablets are taken out, the medicine placing plate one 32 is manually lifted to make the inserting rod 331 on the medicine placing plate two 33 completely separate from the placing hole 321, and the clamping plate 36 rotates relative to the adjusting rod 35 under the restoring action of the spring one 38 to switch the medicine placing plate one 32 and the medicine placing plate two 33 back to the medicine making state, waiting for the next drying and medicine making operation.

[0064] The principle and implementation mode of the specific examples are described in the utility model, and the above embodiment is only used to help understand the method and core idea of the utility model. Meanwhile, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the utility model.

Claims

1. A pharmaceutical oven, characterized in that, The utility model relates to a medicine box, including: Box shell (1), the box door (2) of openable configuration is equipped on box shell (1); Placement frame (4) is set up in the inner wall of box shell (1); Placement board (3) includes board support (31), medicine board one (32) and medicine board two (33), board support (31) is set up in placement frame (4), medicine board one (32) is located above board support (31) and is connected with board support (31) movably, the placement hole (321) for placing tablet is seted up on medicine board one (32), medicine board two (33) is installed between board support (31) and medicine board one (32), the upper surface of medicine board two (33) is provided with a plurality of with the placement hole (321) adaptation's insert rod (331), medicine board two (33) is connected with at least one of board support (31) and medicine board one (32) through switching mechanism, the switching mechanism can drive medicine board one (32) and medicine board two (33) relative displacement, make medicine board one (32) and medicine board two (33) between the medicine preparation state and the medicine taking state switching, and when the medicine preparation state, the insert rod (331) is misaligned with corresponding placement hole (321), the insert rod (331) supports medicine board one (32) and carries the tablet in the placement hole (321), when the medicine taking state, the insert rod (331) is inserted into corresponding placement hole (321) to eject the tablet in the placement hole (321).

2. The pharmaceutical oven according to claim 1, wherein Medicine board two (33) is fixed on board support (31), and the switching mechanism can drive medicine board one (32) to move relative to medicine board two (33) to switch medicine board one (32) and medicine board two (33) between the medicine preparation state and the medicine taking state.

3. The pharmaceutical oven of claim 2, wherein, The upper surface of board support (31) is provided with a groove matched with medicine board two (33), medicine board two (33) is embedded in the groove, and the insert rod (331) protrudes from the upper surface of board support (31);Medicine board one (32) covers the upper surface of board support (31).

4. The pharmaceutical oven of claim 3, wherein, The switching mechanism includes: Adjusting rod (35), the first end is connected with medicine board two (33), and the second end penetrates the side wall of the groove on board support (31) and extends to the outside of the groove; Connection plate (37) is arranged on the upper surface of the second end of adjusting rod (35); The top of clamping plate (36) is connected with connection plate (37) through spring one (38), and the top end of clamping plate (36) is connected with medicine board one (32);The bottom of clamping plate (36) is movably connected with the second end of adjusting rod (35).

5. The pharmaceutical oven of claim 4, wherein, The bottom of clamping plate (36) is provided with a slot, and the second end of adjusting rod (35) is movably arranged in the slot.

6. The pharmaceutical oven of claim 4, wherein, The side wall of the groove is provided with an upwardly open mounting groove (39); a connecting section is arranged between the first end and the second end of the adjusting rod (35), the connecting section is mounted in the mounting groove (39), and the second end of the adjusting rod (35) is wider than the connecting section, so as to limit the mounting position of the adjusting rod (35) in the mounting groove (39).

7. The pharmaceutical oven of claim 4, wherein, The top end of the clamping plate (36) is provided with a protrusion, the medicine placing plate (32) is provided with a connecting block, and the top end of the clamping plate (36) is clamped with the connecting block through the protrusion.

8. The pharmaceutical oven according to any one of claims 4 to 7, characterized in that The switching mechanism is provided with at least two groups.

9. The pharmaceutical oven according to any one of claims 1 to 7, characterized in that The placing racks (4) are arranged in pairs in the box shell (1), and any pair of the placing racks (4) are symmetrically arranged on the left and right sides of the box shell (1), and a plurality of pairs of the placing racks (4) are arranged in the box shell (1) along the height direction.

10. The pharmaceutical oven of claim 9, wherein, Any one of the placing racks (4) is detachably mounted in the box shell (1) through a placing rack mounting structure (5), and the placing rack mounting structure (5) comprises: An insert (51) is arranged at the bottom of the placing rack (4), and a downwardly open insertion groove (52) is formed at the bottom of the insert (51); A support rod (53) is connected to the inner wall of the box shell (1) at the first end; A stop ring (55) is movably sleeved on the support rod (53), and an insert (51) space is formed between the stop ring (55) and the first end of the support rod (53), the placing rack (4) is inserted on the support rod (53) in the insert (51) space through the insert (51); A spring (54) is sleeved outside the support rod (53) and located between the stop ring (55) and the second end of the support rod (53), and the spring (54) can exert a spring force on the stop ring (55) to tightly press the insert (51) on the support rod (53).

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