Safety resistor mounting and correcting device applied to bulb lamp

Abstract

The invention belongs to the technical field of bulb lamp production, and discloses a safety resistor mounting and correcting device applied to a bulb lamp. The rotating table is arranged in the middle of the top of the body; the fixed seat is arranged on the outer side of the top of the rotating table; the bulb lamp bottom shell is movably mounted at the top of the fixed seat; the triggering assembly is arranged in the fixing base and located at the bottom of the bulb lamp bottom shell; according to the technical scheme, the triggering assembly and the multi-size clamping mechanism are arranged, when the bottom end of the bulb lamp bottom shell is inserted into the fixing base, and the output end of the triggering assembly is pushed to retract into the triggering assembly, hydraulic oil in the triggering assembly can be guided into the inner wall of the multi-size clamping mechanism, and therefore the bulb lamp can be clamped; therefore, the two ends of the multi-size clamping mechanism can be pushed to face each other, at the moment, adaptive adjustment clamping can be carried out according to the sizes of bottom screw openings of different types of trigger assemblies, the limitation that only a bottom screw opening of a single-size trigger assembly can be clamped is avoided, and the use range of the device is greatly widened.

Description

Technical Field

[0001] The invention belongs to the technical field of bulb lamp production, and in particular is a fuse resistor installation and correction device applied to bulb lamps. Background Art

[0002] The fuse resistor plays a role of current limiting and protection in the bulb circuit. When the current is too large, the fuse resistor can melt, thereby cutting off the circuit and preventing the bulb and other circuit components from being damaged. The installation correction device is the installation positioning device, which is to ensure that the fuse resistor can be correctly and stably installed in the circuit and can play a protective role when needed.

[0003] The existing device for installing and correcting the fuse resistor of a bulb lamp is to place the bulb lamp base shell and the circuit board as a whole on a positioning clamping device, and then use a robot to take the corresponding fuse resistor for positioning and installation. However, since the screw hole sizes of different types of bulb lamp base shells are different, only one screw hole size can be clamped when clamping and positioning the bulb lamp base shell, which greatly reduces the scope of use. Therefore, it is necessary to improve it. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a fuse resistor installation and correction device applied to a bulb lamp, which has the advantage of being easy to clamp and position the screw mouth of the bottom shell of bulb lamps of various sizes and models.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a safety resistor installation and correction device applied to a bulb lamp, comprising a body; a rotating table, arranged in the middle of the top of the body; a fixing seat, arranged on the outer side of the top of the rotating table; a bottom shell of the bulb lamp, movably mounted on the top of the fixing seat; a trigger assembly, arranged inside the fixing seat and located at the bottom of the bottom shell of the bulb lamp; a multi-size clamping mechanism, comprising a second hydraulic cylinder, the second hydraulic cylinder is fixedly installed inside the fixing seat and located on the outer side of the trigger assembly, a second hydraulic rod is movably installed inside the second hydraulic cylinder, the outer end of the second hydraulic rod is fixedly installed with the clamping assembly, and the bottom end of the outer side of the second hydraulic cylinder is fixedly connected to the bottom of the trigger assembly through a first oil groove.

[0006] Preferably, a positioning mechanism located on one side of the rotating platform is fixedly mounted on the top of the machine body.

[0007] Preferably, a mounting hole is provided on the top of the bottom shell of the bulb lamp, and a manipulator located in the middle of one side of the rotating platform is provided on the top of the body.

[0008] Preferably, the trigger assembly comprises a first hydraulic cylinder, a first hydraulic rod and a first power spring;

[0009] The first hydraulic cylinder is fixedly installed inside the fixing seat and is located at the bottom of the bulb bottom shell. The first hydraulic rod is movably installed in the inner cavity of the first hydraulic cylinder. The first hydraulic rod is elastically connected to the inside of the first hydraulic cylinder through a first power spring.

[0010] Preferably, the other end of the first oil groove is fixedly connected to the outer side of the bottom of the first hydraulic cylinder.

[0011] Preferably, the outer side of the top end of the first hydraulic cylinder is fixedly connected to the top of the inner end of the second hydraulic cylinder through a ventilation groove.

[0012] Preferably, the clamping assembly comprises a movable frame and a clamping block;

[0013] The movable frame is fixedly installed on the outer end of the second hydraulic rod, and the clamping block is arranged on the inner end of the top of the movable frame, and the clamping block is made of rubber.

[0014] Preferably, a pressure relief assembly located outside the second hydraulic cylinder is provided inside the fixing seat, and the pressure relief assembly includes a pressure relief cylinder, a second oil passage groove and a first valve flap;

[0015] The pressure relief cylinder is fixedly installed inside the fixing seat and is located at the top of the outer end of the movable frame. The bottom of the inner end of the pressure relief cylinder is fixedly connected to the inner end of the second hydraulic cylinder through the second oil groove. The first valve flap is arranged at the inner end of the inner wall of the second oil groove.

[0016] Preferably, a reinforcement mechanism located inside the pressure relief cylinder is provided inside the fixing seat, and the reinforcement mechanism includes a movable rod, a fixing assembly, a second power spring and a second valve flap;

[0017] The movable rod is movably installed in the inner cavity of the pressure relief cylinder, the fixed assembly is fixedly installed on the inner end of the movable rod, the movable rod is elastically connected to the inside of the pressure relief cylinder through a second power spring, and the second valve flap is fixedly installed in the middle of the outer end of the pressure relief cylinder.

[0018] Preferably, the fixing assembly comprises a rectangular block, a first tooth block, a connecting spring and a second tooth block;

[0019] The rectangular block is fixedly installed on the inner end of the movable rod, the first tooth block is movably installed in the inner cavity of the rectangular block, the first tooth block is elastically connected to the inner wall of the rectangular block through a connecting spring, the second tooth block is fixedly installed on the top of the movable frame and is located directly below the first tooth block, and the bottom end of the first tooth block is engaged with the top of the second tooth block.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The above technical solution sets a trigger component and a multi-size clamping mechanism, inserts the bottom end of the bulb bottom shell into the fixing seat, and when the output end of the trigger component is pushed to retract into the trigger component, the hydraulic oil inside the trigger component will be introduced into the inner wall of the multi-size clamping mechanism, thereby causing the two ends of the multi-size clamping mechanism to be pushed toward each other. At this time, the clamping can be adjusted and adapted according to the size of the bottom screw of the trigger component of different models, avoiding the limitation of only being able to clamp the bottom screw of a single size of the trigger component, thereby greatly improving the scope of use of the device.

[0022] The present invention provides a pressure relief component, and when clamping the screw holes at the bottom of the bulb bottom shells of different sizes, the distances at which the two ends of the clamping mechanisms of different sizes move toward each other are different. Since the hydraulic oil will not be compressed, the excess hydraulic oil will be squeezed into the inner wall of the pressure relief component for pressure relief treatment, so that the two ends of the clamping mechanisms of different sizes can smoothly move toward each other to stably clamp the bulb bottom shells of different models.

[0023] The present invention provides a reinforcement mechanism. When the inner end of the reinforcement mechanism is engaged and fixed with the top of the multi-size clamping mechanism, the effect of the multi-size clamping mechanism clamping the bottom shell of the bulb lamp in opposite directions can be reinforced. When the top of the multi-size clamping mechanism is not completely opposite to the inner end of the reinforcement mechanism and is misaligned, excess hydraulic oil at the bottom of the multi-size clamping mechanism can enter the pressure relief component to release pressure, so that the outer end of the reinforcement mechanism can be pushed by the hydraulic pressure at the top of the pressure relief component to drive the entire reinforcement mechanism to move in opposite directions, thereby allowing the inner end of the reinforcement mechanism to be smoothly engaged and fixed with the top of the multi-size clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the fixing seat of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the bottom shell of the bulb lamp of the present invention;

[0027] Figure 4 It is a cross-sectional structural schematic diagram of the fixing seat of the present invention;

[0028] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at point A in the middle;

[0029] Figure 6 for Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0030] Figure 7 It is a schematic structural diagram of the first power spring of the present invention;

[0031] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at point C in the middle.

[0032] In the figure: 1, machine body; 2, rotating table; 3, fixed seat; 4, positioning mechanism; 5, manipulator; 6, bottom shell of bulb; 7, trigger assembly; 701, first hydraulic cylinder; 702, first hydraulic rod; 703, first power spring; 8, multi-size clamping mechanism; 801, second hydraulic cylinder; 802, second hydraulic rod; 803, clamping assembly; 8031, movable frame; 8032, clamping block; 804, first oil groove; 9, ventilation groove; 10, pressure relief assembly; 101, pressure relief cylinder; 102, second oil groove; 103, first valve flap; 11, reinforcement mechanism; 1101, movable rod; 1102, fixing assembly; 11021, rectangular block; 11022, first tooth block; 11023, connecting spring; 11024, second tooth block; 1103, second power spring; 1104, second valve flap. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 8 As shown, the present invention provides a safety resistor installation and correction device for a bulb lamp, comprising a body 1; a rotating table 2, arranged in the middle of the top of the body 1; a fixing seat 3, arranged on the outer side of the top of the rotating table 2; a bulb lamp bottom shell 6, movably installed on the top of the fixing seat 3; a trigger assembly 7, arranged inside the fixing seat 3 and located at the bottom of the bulb lamp bottom shell 6; a multi-size clamping mechanism 8, comprising a second hydraulic cylinder 801, the second hydraulic cylinder 801 is fixedly installed inside the fixing seat 3 and located on the outer side of the trigger assembly 7, a second hydraulic rod 802 is movably installed inside the second hydraulic cylinder 801, a clamping assembly 803 is fixedly installed on the outer end of the second hydraulic rod 802, and the bottom end of the outer side of the second hydraulic cylinder 801 is fixedly connected to the bottom of the trigger assembly 7 through a first oil groove 804.

[0035] When the output end of the trigger component 7 is pushed downward by the bulb bottom shell 6, the internal hydraulic oil can be introduced into the second hydraulic cylinder 801 through the first oil groove 804, so that the second hydraulic rod 802 is pushed to drive the two clamping components 803 to move towards each other, thereby clamping the bottom end of the bulb bottom shell 6.

[0036] like Figure 1As shown, a positioning mechanism 4 located on one side of the rotating platform 2 is fixedly installed on the top of the machine body 1 .

[0037] By adopting the above scheme, when one end of the positioning mechanism 4 is extended, the extended part can block the gap between the fixing seats 3, so as to position and fix the fixing seats 3, so as to smoothly position and install the safety resistor on the top of the bulb bottom shell 6 later.

[0038] like Figure 1 As shown, a mounting hole is arranged on the top of the bottom shell 6 of the bulb lamp, and a manipulator 5 located in the middle of one side of the rotating platform 2 is arranged on the top of the body 1 .

[0039] By adopting the above solution, the corresponding fuse resistor can be clamped and picked up by the robot 5, and then placed and installed inside the mounting hole on the top of the bulb bottom shell 6, so as to realize the automatic assembly of the fuse resistor.

[0040] like Figure 3 As shown, the trigger assembly 7 includes a first hydraulic cylinder 701, a first hydraulic rod 702 and a first power spring 703;

[0041] The first hydraulic cylinder 701 is fixedly installed inside the fixing seat 3 and is located at the bottom of the bulb bottom shell 6. The first hydraulic rod 702 is movably installed in the inner cavity of the first hydraulic cylinder 701. The first hydraulic rod 702 is elastically connected to the inside of the first hydraulic cylinder 701 through the first power spring 703.

[0042] The above scheme is adopted: by providing a first power spring 703, when the bottom shell 6 of the bulb lamp is inserted downward into the fixing seat 3, the first hydraulic rod 702 is pushed to move downward as a whole, and the first power spring 703 is compressed at the same time. When the bottom shell 6 of the bulb lamp is taken out upward, the elastic force of the first power spring 703 can be released, thereby pushing the first hydraulic rod 702 to move upward and reset as a whole.

[0043] like Figure 3 and Figure 4 As shown, the other end of the first oil groove 804 is fixedly connected to the outer side of the bottom of the first hydraulic cylinder 701 .

[0044] The above scheme is adopted: by providing a first oil groove 804, when the first hydraulic rod 702 is inserted into the bulb bottom shell 6 and pushed downward as a whole, the hydraulic oil at the bottom of the inner cavity of the first hydraulic cylinder 701 can be introduced into the outside of the inner cavity of the second hydraulic cylinder 801 through the first oil groove 804, so as to drive the two clamping components 803 to move towards each other.

[0045] like Figure 3 As shown, the outer side of the top end of the first hydraulic cylinder 701 is fixedly connected to the top of the inner end of the second hydraulic cylinder 801 through the ventilation groove 9.

[0046] The above scheme is adopted: by providing the ventilation groove 9, when the first hydraulic rod 702 moves downward as a whole, negative pressure will be generated at the top of the inner cavity of the first hydraulic cylinder 701, and the gas in the inner cavity of the second hydraulic cylinder 801 can be extracted through the ventilation groove 9, thereby maintaining the first hydraulic rod 702 and the second hydraulic rod 802 to move stably inside the first hydraulic cylinder 701 and the second hydraulic cylinder 801 respectively.

[0047] like Figure 3 and Figure 4 As shown, the clamping assembly 803 includes a movable frame 8031 ​​and a clamping block 8032;

[0048] The movable frame 8031 ​​is fixedly installed on the outer end of the second hydraulic rod 802, and the clamping block 8032 is arranged on the inner end of the top of the movable frame 8031, and the clamping block 8032 is made of rubber.

[0049] The above solution is adopted: by providing a clamping block 8032, since the clamping block 8032 is made of rubber and has a deformable property, it can be subsequently adapted and clamped for the screw holes at the bottom of the bottom shell 6 of bulb lamps of different sizes and models.

[0050] like Figure 3 As shown, a pressure relief assembly 10 located outside the second hydraulic cylinder 801 is disposed inside the fixing seat 3, and the pressure relief assembly 10 includes a pressure relief cylinder 101, a second oil groove 102 and a first valve flap 103;

[0051] The pressure relief cylinder 101 is fixedly installed inside the fixed seat 3 and is located at the top of the outer end of the movable frame 8031. The bottom of the inner end of the pressure relief cylinder 101 is fixedly connected to the inner end of the second hydraulic cylinder 801 through the second oil groove 102. The first valve flap 103 is arranged at the inner end of the inner wall of the second oil groove 102.

[0052] The above scheme is adopted: by providing a first valve flap 103, when the second hydraulic rod 802 and the clamping assembly 803 do not move toward each other to the maximum value, the excess hydraulic oil inside the second hydraulic cylinder 801 will squeeze and push the first valve flap 103 to flip open, and can enter the internal storage of the first valve flap 103 in one direction through the second oil groove 102, thereby achieving the purpose of pressure relief.

[0053] like Figure 3 , Figure 5 and Figure 8 As shown, a reinforcement mechanism 11 located inside the pressure relief cylinder 101 is provided inside the fixing seat 3, and the reinforcement mechanism 11 includes a movable rod 1101, a fixing assembly 1102, a second power spring 1103 and a second valve flap 1104;

[0054] The movable rod 1101 is movably installed in the inner cavity of the pressure relief cylinder 101, the fixing assembly 1102 is fixedly installed on the inner end of the movable rod 1101, the movable rod 1101 is elastically connected to the inside of the pressure relief cylinder 101 through the second power spring 1103, and the second valve flap 1104 is fixedly installed in the middle of the outer end of the pressure relief cylinder 101.

[0055] The above scheme is adopted: by providing a second power spring 1103, when hydraulic oil enters the pressure relief cylinder 101, it will push the two movable rods 1101 and the fixed assembly 1102 to move in opposite directions, and at the same time compress the second power spring 1103 as a whole. When the hydraulic oil inside the pressure relief cylinder 101 is pumped out and reset, the elastic force of the second power spring 1103 will be released, and finally the movable rod 1101 and the fixed assembly 1102 can be pushed to move and reset as a whole.

[0056] like Figure 5 As shown, the fixing assembly 1102 includes a rectangular block 11021, a first tooth block 11022, a connecting spring 11023 and a second tooth block 11024;

[0057] The rectangular block 11021 is fixedly installed on the inner end of the movable rod 1101, the first tooth block 11022 is movably installed in the inner cavity of the rectangular block 11021, the first tooth block 11022 is elastically connected to the inner wall of the rectangular block 11021 through the connecting spring 11023, the second tooth block 11024 is fixedly installed on the top of the movable frame 8031, and is located directly below the first tooth block 11022, and the bottom end of the first tooth block 11022 is engaged with the top of the second tooth block 11024.

[0058] The above scheme is adopted: by providing a first tooth block 11022, when the first tooth block 11022 and the second tooth block 11024 are facing each other, the elastic force of the connecting spring 11023 will push the first tooth block 11022 as a whole downward, and then the bottom end of the first tooth block 11022 will be engaged and fixed with the top of the second tooth block 11024, thereby reinforcing the overall clamping effect of the clamping assembly 803.

[0059] The working principle and use process of the present invention:

[0060] First, when the operator needs to place and fix the bulb base shell 6 of the corresponding model and size on the top of the fixing seat 3, the bottom screw thread part of the bulb base shell 6 can be inserted into the fixing seat 3 first, which will push the first hydraulic rod 702 to move downward as a whole, so that the hydraulic oil at the bottom of the first hydraulic cylinder 701 is pushed through the first oil groove 804 into the inner wall of the second hydraulic cylinder 801, so that the hydraulic pressure of the outer inner cavity of the second hydraulic cylinder 801 becomes larger, and the two second hydraulic rods 802, the movable frame 8031 ​​and the clamping block 8032 are pushed to move toward each other as a whole, and then through the deformable design of the clamping block 8032, different models of bulb base shells 6 can be clamped toward each other according to the size of the bottom screw thread.

[0061] When the second hydraulic rod 802 and the clamping assembly 803 do not move toward each other to the maximum as a whole, the excess hydraulic oil inside the second hydraulic rod 802 will squeeze and push the first valve flap 103 to flip open. At this time, the excess hydraulic oil will enter the inner wall of the pressure relief cylinder 101 through the second oil groove 102 for storage, thereby achieving the purpose of pressure relief.

[0062] At the same time, the hydraulic pressure in the pressure relief cylinder 101 increases, which will push the two movable rods 1101 to move towards each other, so that the rectangular block 11021 and the first tooth block 11022 can be driven to move synchronously as a whole, so as to keep the first tooth block 11022 and the second tooth block 11024 aligned, and the top teeth of the second tooth block 11024 will squeeze and push the first tooth block 11022 upward, while compressing the connecting spring 11023 until the bottom teeth of the first tooth block 11022 are completely aligned with the teeth of the second tooth block 11024, and finally due to the release of the elastic force of the connecting spring 11023, the first tooth block 11022 can be pushed downward as a whole, so that the bottom teeth of the first tooth block 11022 and the top teeth of the second tooth block 11024 are completely engaged and fixed.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0064] 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 fuse resistor installation and correction device for a bulb lamp, characterized in that: comprising a body (1); A rotating platform (2) is arranged in the middle of the top of the machine body (1); A fixed seat (3) is arranged on the outer side of the top of the rotating platform (2); The bottom shell (6) of the bulb lamp is movably mounted on the top of the fixing seat (3); A trigger assembly (7) is arranged inside the fixing seat (3) and is located at the bottom of the bulb lamp bottom shell (6); The multi-size clamping mechanism (8) comprises a second hydraulic cylinder (801), the second hydraulic cylinder (801) is fixedly mounted inside a fixing seat (3) and is located outside a trigger assembly (7), a second hydraulic rod (802) is movably mounted inside the second hydraulic cylinder (801), a clamping assembly (803) is fixedly mounted on the outer end of the second hydraulic rod (802), and the bottom end of the outer side of the second hydraulic cylinder (801) is fixedly connected to the bottom of the trigger assembly (7) through a first oil groove (804).

2. The fuse resistor installation and correction device for bulb lamps according to claim 1, characterized in that: A positioning mechanism (4) located on one side of the rotating platform (2) is fixedly mounted on the top of the machine body (1).

3. The fuse resistor installation and correction device for bulb lamp according to claim 1, characterized in that: The top of the bulb bottom shell (6) is provided with a mounting hole, and the top of the machine body (1) is provided with a manipulator (5) located in the middle of one side of the rotating platform (2).

4. The fuse resistor installation and correction device for bulb lamp according to claim 1, characterized in that: The trigger assembly (7) comprises a first hydraulic cylinder (701), a first hydraulic rod (702) and a first power spring (703); The first hydraulic cylinder (701) is fixedly installed inside the fixing seat (3) and is located at the bottom of the bulb lamp bottom shell (6); the first hydraulic rod (702) is movably installed in the inner cavity of the first hydraulic cylinder (701); the first hydraulic rod (702) is elastically connected to the inside of the first hydraulic cylinder (701) via a first power spring (703).

5. The fuse resistor installation and correction device for bulb lamp according to claim 1, characterized in that: The other end of the first oil groove (804) is fixedly connected to the outer side of the bottom of the first hydraulic cylinder (701).

6. The fuse resistor installation and correction device for bulb lamps according to claim 4, characterized in that: The outer side of the top end of the first hydraulic cylinder (701) is fixedly connected to the top of the inner end of the second hydraulic cylinder (801) through a venting groove (9).

7. The fuse resistor installation and correction device for bulb lamp according to claim 1, characterized in that: The clamping assembly (803) comprises a movable frame (8031) and a clamping block (8032); The movable frame (8031) is fixedly mounted on the outer end of the second hydraulic rod (802), and the clamping block (8032) is arranged on the inner end of the top of the movable frame (8031), and the clamping block (8032) is made of rubber.

8. The fuse resistor installation and correction device for bulb lamp according to claim 1, characterized in that: A pressure relief assembly (10) located outside the second hydraulic cylinder (801) is arranged inside the fixing seat (3), and the pressure relief assembly (10) comprises a pressure relief cylinder (101), a second oil groove (102) and a first valve flap (103); The pressure relief cylinder (101) is fixedly installed inside the fixing seat (3) and is located at the top of the outer end of the movable frame (8031). The bottom of the inner end of the pressure relief cylinder (101) is fixedly connected to the inner end of the second hydraulic cylinder (801) through the second oil groove (102). The first valve flap (103) is arranged at the inner end of the inner wall of the second oil groove (102).

9. The fuse resistor installation and correction device for bulb lamp according to claim 1, characterized in that: The interior of the fixing seat (3) is provided with a reinforcement mechanism (11) located inside the pressure relief cylinder (101), and the reinforcement mechanism (11) comprises a movable rod (1101), a fixing assembly (1102), a second power spring (1103) and a second valve flap (1104); The movable rod (1101) is movably mounted in the inner cavity of the pressure relief cylinder (101), the fixed assembly (1102) is fixedly mounted on the inner end of the movable rod (1101), the movable rod (1101) is elastically connected to the inside of the pressure relief cylinder (101) via a second power spring (1103), and the second valve flap (1104) is fixedly mounted in the middle of the outer end of the pressure relief cylinder (101).

10. The fuse resistor installation and correction device for bulb lamps according to claim 9, characterized in that: The fixing assembly (1102) comprises a rectangular block (11021), a first tooth block (11022), a connecting spring (11023) and a second tooth block (11024); The rectangular block (11021) is fixedly installed on the inner end of the movable rod (1101), the first tooth block (11022) is movably installed in the inner cavity of the rectangular block (11021), the first tooth block (11022) is elastically connected to the inner wall of the rectangular block (11021) via a connecting spring (11023), the second tooth block (11024) is fixedly installed on the top of the movable frame (8031), and is located directly below the first tooth block (11022), and the bottom end of the first tooth block (11022) is engaged with the top of the second tooth block (11024).

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