Temperature detection device for casting machining of agricultural machinery parts

Abstract

The invention provides a temperature detection device for casting machining of agricultural machinery parts, and relates to the field of temperature detection.The temperature detection device comprises a supporting piece, the supporting piece is of a U-shaped plate-shaped structure, a stress rod is of a cylindrical structure, the front end of the supporting piece is connected with a connector through a reset plate, a cleaning plate is installed in an outer piece, and the upper end and the lower end of the cleaning plate are inclined; and the exterior of the cleaning plate is frosted. After temperature detection is completed, the device is controlled to move backwards, a supporting rod and a spring outside a reset plate support and reset at the same time, an embedded block pushes a stress rod to reset through a long plate, an outer part moves forwards and upwards, a cleaning plate is driven to move together, and the cleaning plate slides to pass through the front end of a thermocouple. Dirt contaminated by the thermocouple is conveniently erased, the sensitivity of the thermocouple is prevented from being affected, and the problems that when an existing temperature detection device is used, the thermocouple is contaminated by the dirt after being in contact with an object for many times, and the temperature measurement accuracy is affected after the dirt is accumulated are solved.

Description

Technical Field

[0001] The invention relates to the technical field of temperature detection, and in particular to a temperature detection device for casting and processing agricultural machinery accessories. Background Art

[0002] When processing and casting agricultural machinery parts, it is usually necessary to detect the temperature in real time to avoid abnormal temperature. At this time, a temperature detection device is needed.

[0003] When the existing temperature detection device is in use, the temperature of the detected object is relatively high, and the hand will be close to the detected object during detection, which may easily cause burns to the hand; during detection, the thermocouple will produce impact and collision after contact with the object, and multiple impacts and collisions will cause damage to the device. After multiple contacts with the object, the thermocouple will be contaminated with dirt, and the accumulation of dirt will affect the accuracy of temperature measurement. Summary of the invention

[0004] In view of this, the present invention provides a temperature detection device for casting and processing of agricultural machinery accessories to solve the problem that when the existing temperature detection device is in use, the temperature of the detection object is relatively high, and the hand will be close to the detection object during detection, which may easily cause hand burns.

[0005] The present invention provides a temperature detection device for casting and processing of agricultural machinery accessories, which specifically comprises: a main body; a temperature measuring display screen is arranged at the top of the main body, a connecting piece is connected to the rear of the main body through a fixing piece, a protective piece is fixed to the bottom of the connecting piece, the protective piece is a U-shaped structure, and the protective piece is made of plastic; a support rod, the support rod is a T-shaped shaft structure, a spring is sleeved on the outside of the support rod, the support rod is fixed to the rear of the main body, the front end of the support rod is connected to a guide plate through a connecting plate, a contact piece is arranged at the top of the guide plate, the contact piece is a wedge-shaped structure, and a contact piece is arranged at the bottom of the contact piece A stepped groove, the contact piece is made of rubber; a support piece, the support piece is a U-shaped plate structure, the support piece is made of metal, the support piece is at the front end of the main body and the support rod, the rear end of the support piece is provided with a force rod, the force rod is a cylindrical structure, the force rod is made of metal, the front end of the support piece is connected with a connecting head through a reset plate, the front end of the connecting head is provided with two L-shaped plates, the top ends of the two L-shaped plates are fixed with external parts, the inside of the external parts is installed with a cleaning plate, the cleaning plate is a U-shaped plate structure, the upper and lower ends of the cleaning plate are inclined, and the outside of the cleaning plate is frosted.

[0006] Optionally, two fixing parts are respectively provided on both sides of the rear of the main body, and the fixing parts are U-shaped structures. A control part is provided at the bottom of the main body, and the control part is a T-shaped structure; a connecting part is inserted into the interior of every two of the fixing parts, and the bottom end of the connecting part is a wedge-shaped structure, and a groove is provided inside the connecting part. The connecting part is made of elastic plastic material, and two clamping blocks are provided on the outside of each connecting part, and the clamping blocks are wedge-shaped structures; two bottom plates are provided at the bottom of the protective part, and the bottom plate is a U-shaped structure, and the front end of the bottom plate is a wedge-shaped structure. The bottom plate is made of plastic material, and a pushing block is provided inside the bottom plate. The pushing block is a U-shaped structure, and the two sides of the pushing block are inclined structures. The pushing block is made of elastic plastic material, and a contact plate is provided at the bottom of the pushing block, and the contact plate is a rectangular structure and made of rubber material.

[0007] Optionally, the top of the connecting plate is an arc-shaped structure, the bottom of the connecting plate is a rectangular structure, the guide plate is a U-shaped structure, a guide ring is installed on the outside of the support rod, and the side of the guide ring is in contact with the spring; a bottom block is provided at the bottom of the guide plate, the bottom block is a rectangular structure, a T-shaped slot is provided at the bottom of the bottom block, a control slot is provided inside the bottom block, the control slot is an L-shaped structure, the front end of the control slot is an inclined structure, and a force-bearing rod is inserted into the control slot; the front end of the guide ring is connected to the force-bearing plate through two metal rods, a thermocouple is provided at the front end of the force-bearing plate, the thermocouple is connected to the main body through a line, the front end of the thermocouple is in contact with the cleaning plate, a pressing groove is provided at the bottom of the force-bearing plate, the top of the pressing groove is an inclined structure, a contact piece is embedded in the pressing groove, an embedded block is provided at the bottom of the force-bearing plate, the embedded block is embedded in the guide plate, and a long plate is provided on both sides of the front end of the embedded block.

[0008] Optionally, an inner plate is provided inside the support member, the inner plate is a rectangular structure, an H-shaped groove is provided inside the inner plate, a reset plate is connected to the front end of the support member, the bottom end of the reset plate is an L-shaped plate structure, the top of the reset plate is a T-shaped shaft structure, and a spring is mounted on the outside of the top end of the reset plate; a support block is inserted into the H-shaped groove of the inner plate, the support block is an H-shaped structure, a rectangular plate is provided on the top of the support block, an insertion plate is provided on the bottom of the support block, the insertion plate is a T-shaped plate structure, the insertion plate is made of metal, and the insertion plate is inserted into the T-shaped groove of the bottom block; the connecting head is a U-shaped structure, a square groove is provided at the front end of the connecting head, the bottom end of the reset plate is inserted into the square groove, a square plate is provided at the top of the connecting head, a circular hole is provided inside the square plate, the top of the reset plate is embedded in the circular hole, the outer member is a U-shaped structure, the outer member is made of metal, and a rotatable round rod is provided at the front end of the outer member.

[0009] Beneficial effects: 1. By setting the protective part, when the device is in use, the connecting part can be controlled to drive the card block and the protective part to move together, so that the connecting part can be inserted into the interior of the fixing part, and the card block can be fixed with the outside of the fixing part, so that the protective part can be driven and fixed together, so that when the device detects the temperature through the thermocouple, when the hand is close to the detection object, the protective part can be on the outside of the hand for protection, thereby preventing the temperature of the object from being transferred to the hand, avoiding burns to the hand.

[0010] 2. By setting the contact piece and the support rod, when the device is in use, after the thermocouple contacts the detection object, the thermocouple will be impacted and collided. At this time, the thermocouple can move backward, and then the force plate and the guide ring are displaced, so that the guide ring can squeeze the spring outside the support rod, thereby buffering the impact force, and at the same time, the pressure groove at the bottom of the force plate can be made to slide in contact with the contact piece. Since the contact piece is a wedge-shaped structure and is made of rubber, it can gradually control the force plate and the thermocouple to stop moving, so that the contact piece can automatically deform and buffer, thereby improving the protection effect of the thermocouple.

[0011] 3. By setting a stress rod and a cleaning plate, when the device is in use, the external part and the round rod at the front end thereof are directly controlled to contact the detection object, and then the device is pushed so that the spring outside the support rod can be initially squeezed, and at the same time, the stress rod can be moved inside the front end of the control groove. Since the front end of the control groove is an inclined structure, the stress rod can drive the external part to move outward through the support plate, so that the front end of the thermocouple can be exposed, and then the connector continues to be displaced by force, and the spring outside the top of the reset plate is compressed, so that the outer plate can move backward, so that the front end of the thermocouple can contact the object to detect the temperature. When the temperature detection is completed, the device can be controlled to move backward, and at the same time, the support rod and the spring outside the reset plate support and reset at the same time, so that the external part moves forward, and at the same time, the embedded block pushes the stress rod to reset through the long plate, so that the external part can move forward and upward, thereby driving the cleaning plate to move together, so that the cleaning plate can slide through the front end of the thermocouple, and the dirt contaminated by the thermocouple is conveniently wiped off, so that the device can automatically complete the cleaning of the dirt, and avoid the accumulation of dirt and the influence of the sensitivity of the thermocouple. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0013] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0014] In the attached picture: Figure 1 is a schematic diagram of the three-dimensional structure of a temperature detection device according to an embodiment of the present invention; Figure 2 is a bottom view structural schematic diagram of a temperature detection device according to an embodiment of the present invention; Figure 3 is a schematic diagram of an exploded three-dimensional structure of a temperature detection device according to an embodiment of the present invention; Figure 4 is an exploded bottom view of the temperature detection device according to an embodiment of the present invention; Figure 5 is a schematic diagram of the main exploded three-dimensional structure of the temperature detection device of an embodiment of the present invention; Figure 6 is a schematic diagram of an exploded three-dimensional structure of a support rod of a temperature detection device according to an embodiment of the present invention; Figure 7 is a schematic diagram of an exploded bottom view of the support rod structure of a temperature detection device according to an embodiment of the present invention; Figure 8 It is a schematic diagram of the exploded three-dimensional structure of the support member of the temperature detection device according to an embodiment of the present invention.

[0015] Reference numerals list 1. Main body; 101. Fixing member; 102. Control member; 103. Connecting member; 104. Block; 105. Protective member; 106. Bottom plate; 107. Pushing block; 108. Contact plate; 2. Support rod; 201. Connecting plate; 202. Guide plate; 203. Contact piece; 204. Bottom block; 205. Control groove; 206. Guide ring; 207. Force plate; 208. Embedded block; 3. Support member; 301. Force-bearing rod; 302. Inner plate; 303. Reset plate; 304. Support block; 305. Insert plate; 306. Connector; 307. External member; 308. Cleaning plate. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0017] Example: Please refer to Figures 1 to 8 As shown: The present invention provides a temperature detection device for casting and processing of agricultural machinery parts, comprising a main body 1; a temperature measuring display screen is provided at the top of the main body 1, which can display the measured temperature; a connecting piece 103 is connected to the rear of the main body 1 through a fixing piece 101; a protective piece 105 is fixed to the bottom of the connecting piece 103; the protective piece 105 is a U-shaped structure, the protective piece 105 is made of plastic, can be easily installed and used, and then is located at the front end of the hand for protection to prevent objects from burning the hand; a support rod 2, the support rod 2 is a T-shaped shaft structure, The support rod 2 is provided with a spring on the outside to assist in buffering. The support rod 2 is fixed at the rear of the main body 1. The front end of the support rod 2 is connected to the guide plate 202 through the connecting plate 201. The top of the guide plate 202 is provided with a contact piece 203. The contact piece 203 is a wedge-shaped structure. After the thermocouple contacts the object, the force-bearing plate 207 can press the contact piece 203 through the pressing groove to buffer the impact force and avoid damage to the thermocouple. The bottom of the contact piece 203 is provided with a stepped groove to improve the elasticity of the contact piece 203. The contact 203 is made of rubber and can make the thermocouple deform freely; the support 3 is a U-shaped plate structure, the support 3 is made of metal, the support 3 is at the front end of the main body 1 and the support rod 2, and the rear end of the support 3 is provided with a force rod 301, the force rod 301 is a cylindrical structure, which is used to embed the front end of the control groove 205 to control the internal displacement, so that when the device is detected, the outer part 307 can automatically move downward, so that the front end of the thermocouple can be automatically exposed for detection, the force rod 301 is made of metal, and the support 3 The front end is connected to a connector 306 via a reset plate 303, and two L-shaped plates are provided at the front end of the connector 306. External components 307 are fixed to the top ends of the two L-shaped plates, and a cleaning plate 308 is installed inside the external component 307. The cleaning plate 308 is a U-shaped plate structure, and the upper and lower ends of the cleaning plate 308 are inclined. The exterior of the cleaning plate 308 is frosted so that the cleaning plate 308 can move up and down with the external component 307, so that the cleaning plate 308 can contact the front end of the thermocouple, thereby removing the contaminated dirt.

[0018] refer to Figure 5Two fixing members 101 are respectively provided on both sides of the rear of the main body 1. The fixing members 101 are of a U-shaped structure, which is used to insert and fix the connecting member 103. A control member 102 is provided at the bottom of the main body 1. The control member 102 is of a T-shaped structure, which is used to conveniently operate the main body 1; a connecting member 103 is inserted into the interior of every two fixing members 101, and the bottom end of the connecting member 103 is a wedge-shaped structure. A groove is provided inside the connecting member 103, so that the connecting member 103 can be compressed and deformed, so that the block 104 can be easily detached from the inside of the fixing member 101. The connecting member 103 is made of elastic plastic material, and two blocks 104 are provided on the outside of each connecting member 103. The block 104 is wedge-shaped Structure, used to be clamped and fixed with the fixing piece 101; two bottom plates 106 are provided at the bottom of the protective piece 105, the bottom plate 106 is a U-shaped structure, the front end of the bottom plate 106 is a wedge-shaped structure, the bottom plate 106 is made of plastic, and can assist in controlling the placement of the main body 1, a pushing block 107 is provided inside the bottom plate 106, the pushing block 107 is a U-shaped structure, and the two sides of the pushing block 107 are inclined structures, the pushing block 107 is made of elastic plastic material, and can continuously press the contact plate 108, a contact plate 108 is provided at the bottom of the pushing block 107, the contact plate 108 is a rectangular structure, and the contact plate 108 is made of rubber, which is used for anti-slip contact with the placement surface to improve the stability of the main body 1.

[0019] refer to Figure 6 and Figure 7The top of the connecting plate 201 is an arc-shaped structure, and the bottom of the connecting plate 201 is a rectangular structure, which is used to connect the guide plate 202. The guide plate 202 is a U-shaped structure, so that the embedded block 208 can be guided and displaced inside it, thereby driving the force-bearing plate 207 and the thermocouple to move together. A guide ring 206 is installed on the outside of the support rod 2, and the side of the guide ring 206 contacts the spring, which can push and compress the spring to buffer the impact force; a bottom block 204 is provided at the bottom of the guide plate 202. The bottom block 204 is a rectangular structure, and a T-shaped groove is provided at the bottom of the bottom block 204 to embed the insertion plate 305 so that the support block 304 can be guided and moved. A control groove 205 is provided inside the bottom block 204, and the control groove 205 is an L-shaped structure. The front end of the control groove 205 is an inclined structure, and a force-bearing rod 301 is inserted into the control groove 205 so that the force The rod 301 can be displaced inside it, thereby driving the external part 307 and the cleaning plate 308 to move downward; the front end of the guide ring 206 is connected to the force-bearing plate 207 through two metal rods, and a thermocouple is provided at the front end of the force-bearing plate 207 to support the use of the thermocouple. The thermocouple is connected to the main body 1 through a line and can transmit temperature data to the main body 1. The front end of the thermocouple contacts the cleaning plate 308, and a pressure groove is provided at the bottom of the force-bearing plate 207. The top of the pressure groove is an inclined structure, and a contact piece 203 is embedded in the pressure groove to contact the contact piece 203 to buffer the impact force. An embedded block 208 is provided at the bottom of the force-bearing plate 207, and the embedded block 208 is embedded in the guide plate 202. A long plate is provided on both sides of the front end of the embedded block 208, so that the embedded block 208 can drive the long plate to move together, so that the long plate can push the force-bearing rod 301 to reset.

[0020] refer to Figure 8The support member 3 is provided with an inner plate 302 inside, and the inner plate 302 is a rectangular structure. The inner plate 302 is provided with an H-shaped groove inside, which is used to guide the support block 304 to move inside it, so that the support member 3 can move up and down in a horizontal state to prevent the support member 3 from tilting. The front end of the support member 3 is connected to a reset plate 303, and the bottom end of the reset plate 303 is an L-shaped plate structure, and the top of the reset plate 303 is a T-shaped shaft structure. A spring is sleeved on the top of the reset plate 303 so that the spring can push the square plate to reset; a support block 304 is inserted into the H-shaped groove of the inner plate 302 to enable the inner plate 302 to move vertically. The support block 304 is an H-shaped structure, and a rectangular plate is provided on the top of the support block 304, which can block the limit. The support block 3 An insert plate 305 is provided at the bottom of 04. The insert plate 305 is a T-shaped plate structure and is made of metal. The insert plate 305 is inserted into the T-slot of the bottom block 204 to enable the support block 304 to adaptively move and displace. The connector 306 is a U-shaped structure. A square groove is provided at the front end of the connector 306. The bottom end of the reset plate 303 is inserted into the square groove to guide the displacement of the reset plate 303. A square plate is provided at the top of the connector 306. A round hole is provided inside the square plate. The top end of the reset plate 303 is embedded in the round hole. The outer part 307 is a U-shaped structure and is made of metal. A rotatable round rod is provided at the front end of the outer part 307 to slide in contact with an object so that the front end of the thermocouple can be exposed to detect temperature.Specific usage and function of this embodiment: In the present invention, when it is necessary to use the device, the control member 102 and the main body 1 can be moved by human power first, and then the switch of the main body 1 can be turned on, and then the main body 1 can be controlled to move so that the outer member 307 and the round rod can contact the object to be detected, and then the main body 1 can be slightly pressed so that the support member 3 and the thermocouple can be automatically displaced, so that the inner end of the force-bearing rod 301 can be displaced inside the front end of the control groove 205. Since the front end of the control groove 205 is an inclined structure, the support member 3 can be forced to move downward, so that the inner plate 302 can be located outside the support block 304 and move downward, and at the same time, the insertion plate 305 is inserted into the T-shaped groove. After the support member 3 moves downward, the round rod can be made to slide and contact with the object, so that the outer member 307 can be detached from the front end of the thermocouple, and then the thermocouple is continued to be pushed so that the thermocouple contacts the object, so that the support member 3 is forced to move, and then through the connector 3 06 compresses the spring outside the reset plate 303. After the thermocouple contacts the object, an impact force will be generated, so that the pressure groove can press the contact piece 203, so that the guide ring 206 can compress the spring outside the support rod 2, thereby buffering the collision impact force. At the same time, the protective piece 105 can be outside the hand for protection to prevent the temperature of the object from touching the hand. At the same time, the thermocouple can transmit the detected temperature to the main body 1, so that the main body 1 can display the temperature. After the temperature detection is completed, the main body 1 can be controlled to move backward, so that the spring outside the support rod 2 can push the guide ring 206 and the embedded block 208 to move and reset, so that the long plate can push the force-bearing rod 301 to reset, and at the same time, the spring outside the reset plate 303 can push the outer part 307 to move together, so that the outer part 307 can move outward and upward at the same time, so that the cleaning plate 308 can contact and wipe the front end of the thermocouple, thereby removing the dirt, avoiding the accumulation of residual dirt and affecting the sensitivity of the thermocouple.

Claims

1. A temperature detection device for casting and processing of agricultural machinery parts, characterized in that: The invention comprises a main body (1); a temperature measuring display screen is provided at the top of the main body (1); a connecting piece (103) is connected to the rear of the main body (1) via a fixing piece (101); a protective piece (105) is fixed to the bottom of the connecting piece (103); the protective piece (105) is a U-shaped structure and is made of plastic; a support rod (2); the support rod (2) is a T-shaped shaft structure; a spring is sleeved on the outside of the support rod (2); the support rod (2) is fixed to the rear of the main body (1); a guide plate (202) is connected to the front end of the support rod (2) via a connecting plate (201); a contact piece (203) is provided at the top of the guide plate (202); the contact piece (203) is a wedge-shaped structure; a stepped groove is provided at the bottom of the contact piece (203); The support member (3) is made of rubber; the support member (3) is a U-shaped plate structure, the support member (3) is made of metal, the support member (3) is located at the front end of the main body (1) and the support rod (2), the rear end of the support member (3) is provided with a force-bearing rod (301), the force-bearing rod (301) is a cylindrical structure, the force-bearing rod (301) is made of metal, the front end of the support member (3) is connected to a connector (306) through a reset plate (303), the front end of the connector (306) is provided with two L-shaped plates, the top ends of the two L-shaped plates are fixed with external members (307), a cleaning plate (308) is installed inside the external member (307), the cleaning plate (308) is a U-shaped plate structure, the upper and lower ends of the cleaning plate (308) are inclined, and the outside of the cleaning plate (308) is frosted.

2. A temperature detection device for casting agricultural machinery parts as claimed in claim 1, characterized in that: Two fixing members (101) are respectively provided on both sides of the rear of the main body (1), and the fixing members (101) are of a U-shaped structure. A control member (102) is provided at the bottom of the main body (1), and the control member (102) is of a T-shaped structure.

3. A temperature detection device for casting agricultural machinery parts as claimed in claim 2, characterized in that: A connecting piece (103) is inserted into the interior of every two fixing pieces (101); the bottom end of the connecting piece (103) is a wedge-shaped structure; a groove is provided inside the connecting piece (103); the connecting piece (103) is made of elastic plastic material; two clamping blocks (104) are provided on the outside of each connecting piece (103); the clamping blocks (104) are a wedge-shaped structure.

4. A temperature detection device for casting agricultural machinery parts as claimed in claim 1, characterized in that: Two bottom plates (106) are provided at the bottom of the protective member (105); the bottom plates (106) are U-shaped structures; the front end of the bottom plates (106) is a wedge-shaped structure; the bottom plates (106) are made of plastic material; a push block (107) is provided inside the bottom plates (106); the push block (107) is U-shaped structure; two sides of the push block (107) are inclined structures; the push block (107) is made of elastic plastic material; a contact plate (108) is provided at the bottom of the push block (107); the contact plate (108) is a rectangular structure; and the contact plate (108) is made of rubber material.

5. A temperature detection device for casting agricultural machinery parts as claimed in claim 1, characterized in that: The top of the connecting plate (201) is an arc-shaped structure, the bottom of the connecting plate (201) is a rectangular structure, the guide plate (202) is a U-shaped structure, and a guide ring (206) is installed outside the support rod (2), and the side of the guide ring (206) is in contact with the spring.

6. A temperature detection device for casting agricultural machinery parts as claimed in claim 5, characterized in that: A bottom block (204) is provided at the bottom of the guide plate (202). The bottom block (204) is a rectangular structure. A T-shaped groove is provided at the bottom of the bottom block (204). A control groove (205) is provided inside the bottom block (204). The control groove (205) is an L-shaped structure. The front end of the control groove (205) is an inclined structure. A force-bearing rod (301) is inserted into the control groove (205).

7. A temperature detection device for casting agricultural machinery parts as claimed in claim 6, characterized in that: The front end of the guide ring (206) is connected to a force-bearing plate (207) via two metal rods; a thermocouple is provided at the front end of the force-bearing plate (207); the thermocouple is connected to the main body (1) via a line; the front end of the thermocouple is in contact with a cleaning plate (308); a pressing groove is provided at the bottom of the force-bearing plate (207); the top of the pressing groove is an inclined structure; a contact piece (203) is embedded in the pressing groove; an embedding block (208) is provided at the bottom of the force-bearing plate (207); the embedding block (208) is embedded in the guide plate (202); and a long plate is provided at both sides of the front end of the embedding block (208).

8. A temperature detection device for casting agricultural machinery parts as claimed in claim 7, characterized in that: The support member (3) is provided with an inner plate (302) in a rectangular structure, an H-shaped groove is provided in the inner plate (302), a reset plate (303) is connected to the front end of the support member (3), the bottom end of the reset plate (303) is an L-shaped plate structure, the top end of the reset plate (303) is a T-shaped shaft structure, and a spring is sleeved on the outside of the top end of the reset plate (303).

9. A temperature detection device for casting agricultural machinery parts as claimed in claim 8, characterized in that: A support block (304) is inserted into the H-shaped groove of the inner plate (302); the support block (304) is an H-shaped structure; a rectangular plate is provided at the top of the support block (304); an insertion plate (305) is provided at the bottom of the support block (304); the insertion plate (305) is a T-shaped plate structure; the insertion plate (305) is made of metal; and the insertion plate (305) is inserted into the T-shaped groove of the bottom block (204).

10. A temperature detection device for casting agricultural machinery parts as claimed in claim 9, characterized in that: The connector (306) is a U-shaped structure, a square groove is provided at the front end of the connector (306), the bottom end of the reset plate (303) is inserted into the square groove, a square plate is provided at the top end of the connector (306), a round hole is provided inside the square plate, the top end of the reset plate (303) is embedded in the round hole, and the outer piece (307) is a U-shaped structure, the outer piece (307) is made of metal, and a rotatable round rod is provided at the front end of the outer piece (307).

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