CN110250680A - A kind of multifunctional crutch and its manufacturing method - Google Patents

Abstract

The embodiment of the present invention provides a multi-functional crutch and its manufacturing process. The multi-functional crutch includes: a rod; The axial extension of the support rod; the moving rod, one end of the moving rod is inserted into the upper end of the guide hole, the other end of the moving rod is fixedly connected to the handle, the moving rod can reciprocate up and down in the guiding hole, and the distance between the lower end of the moving rod and the bottom wall of the guiding hole A first spring is provided, one end of the first spring is fixedly connected to the bottom wall of the guide hole, the other end of the first spring is fixedly connected to the bottom end of the moving rod, a second spring is sleeved inside the first spring, and one end of the second spring is connected to the lower end of the moving rod Fixedly connected, the other end of the second spring is fixedly connected to the bottom wall of the guide hole, the first spring is in a compressed state, and the second spring is in a stretched state. The embodiment of the present invention can solve the problem that the elderly are prone to fractures due to the poor force buffering effect of the crutches.

Description

A kind of multifunctional crutch and its manufacturing method

technical field

The embodiment of the present invention relates to the technical field of crutches, in particular to a multifunctional crutch and a manufacturing process thereof.

Background technique

Crutches are an important medical rehabilitation aid, and the existing crutches are usually a wooden or metal stick with a handle. Due to the relatively loose bones of the elderly, when walking on crutches, they are often subject to some collisions or impacts from external forces, but the crutches have no cushioning effect, which often leads to fractures in the elderly and makes the elderly suffer from illnesses.

Contents of the invention

Therefore, the embodiment of the present invention provides a multifunctional crutch and its manufacturing process to solve the problem in the prior art that the crutch is prone to fractures caused by the poor force buffering effect of the crutch.

In order to achieve the above purpose, embodiments of the present invention provide the following technical solutions:

According to the first aspect of the embodiments of the present invention, a multifunctional crutch is provided, comprising:

rod;

A support rod, the bottom end of the support rod is fixedly connected to the top end of the rod, the top end of the support rod is provided with a guide hole, and the guide hole extends along the axial direction of the support rod;

A moving rod, one end of the moving rod is inserted into the upper end of the guide hole, the other end of the moving rod is fixedly connected to the handle, the moving rod can reciprocate up and down in the guiding hole, the lower end of the moving rod is connected to the A first spring is arranged between the bottom walls of the guide holes, one end of the first spring is fixedly connected to the bottom wall of the guide hole, and the other end of the first spring is fixedly connected to the bottom end of the moving rod. A second spring is sheathed in the spring, one end of the second spring is fixedly connected to the lower end of the moving rod, the other end of the second spring is fixedly connected to the bottom wall of the guide hole, the first spring is in a compressed state, The second spring is in tension.

Further, a limiting device is also provided in the guide hole, and the limiting device includes:

A sleeve, arranged in the second spring, one end of the sleeve is fixedly connected to the lower end of the moving rod, the other end of the sleeve extends vertically downward, and a ring is provided at the lower end of the sleeve;

The telescopic rod is arranged in the second spring, one end of the telescopic rod is inserted into the sleeve through the ring, the upper end of the telescopic rod is provided with a limiting piece, and the limiting piece is circular, The diameter of the limiting piece is larger than the diameter of the inner ring of the ring, and the other end of the telescopic rod is fixedly connected with the bottom wall of the guide hole.

Further, a rubber pad is provided at the bottom end of the rod.

Further, a length adjustment device is provided in the handle, and the length adjustment device includes:

The L-shaped warping rod, the handle is in the shape of a cuboid, the handle is arranged in the horizontal direction, and a cavity is arranged in the handle, the intersection of the L-shaped warping rod is provided with a first through hole, and the fixed shaft passes through the The first through hole is described, the L-shaped warping rod can rotate around the fixed shaft, the two ends of the fixed shaft are fixedly connected with both sides of the inner wall of the cavity, and the bottom of the outer wall of the handle is provided with a second two through holes, the second through holes extending along the vertical direction;

An adjustment tube, one end of the adjustment tube is fixedly connected to the bottom of the handle, the upper end of the adjustment tube communicates with the cavity, the upper end of the moving rod is provided with an adjustment hole, and the adjustment hole is along the Extending in the axial direction, the inner wall of the adjustment hole is uniformly provided with a number of slots from top to bottom, one end of the L-shaped warping rod extends to the end of the handle away from the adjustment tube, and the other end of the L-shaped warping rod Extending to the lower end of the adjustment tube, the outer wall of the lower end of the adjustment tube is provided with a third through hole, the lower end of the adjustment tube is inserted into the adjustment hole, and can reciprocate up and down;

The fixed column is arranged at the lower end of the L-shaped warp bar, one end of the fixed column is fixedly connected with the lower end of the L-shaped warped bar, and the other end of the fixed post passes through the third through hole and is clamped on the in the card slot;

An adjustment column is arranged on the other end of the L-shaped lever, one end of the adjustment column is fixedly connected to the L-shaped lever, and the other end of the adjustment column extends to the handle through the second through hole below;

The third spring is arranged in the cavity, one end of the third spring is fixedly connected to the upper end of the adjustment column, and the other end of the third spring is fixedly connected to the top of the inner wall of the cavity.

Further, a fourth spring is arranged in the adjustment hole, one end of the fourth spring is fixedly connected to the bottom end of the adjustment tube, and the other end of the fourth spring is fixedly connected to the bottom wall of the adjustment hole.

Further, the rod consists of a first rod and a second rod,

The upper end of the first rod is fixedly connected to the bottom end of the support rod, the lower end of the first rod is provided with a groove, the inner wall of the groove is provided with internal threads, and the bottom of the groove is fixedly installed with a bearing , a connecting rod is arranged in the groove, one end of the connecting rod is fixedly connected to the inner ring of the bearing, and the other end of the connecting rod extends vertically downward;

The top end of the second rod is provided with a cylinder, the outer wall of the cylinder is provided with external threads, one end of the chain is fixedly connected to the top end of the cylinder, and the other end of the chain is fixedly connected to the lower end of the connecting rod.

According to the second aspect of the embodiments of the present invention, there is provided a method for manufacturing a multifunctional crutch, which is manufactured according to the following steps:

Step 1. Weld the upper end of the rod to the end of the support rod, and weld the end of the moving rod to the bottom of the handle;

Step 2. Drill pilot holes on the upper surface of the support rod;

Step 3, put the first spring on the second spring, and weld the lower ends of the first spring and the second spring to the bottom wall of the guide hole;

Step 4. Pull the upper ends of the first spring and the second spring upwards out of the guide hole, and weld them to the lower end of the moving rod respectively, and then insert the lower end of the moving rod into the guide hole so that the first spring is in a compressed state , while the second spring is in tension.

Embodiments of the present invention have the following advantages:

Through the combination of the first spring and the second spring, the crutch can play a buffering role in the case of a small impact force and a large impact force during use, and the displacement will not produce a large buffer displacement change. The cushioning effect is more gentle, and the crutches will not shake up and down when they are impacted by force during walking. The use of crutches is more stable, reducing the risk of fractures in the elderly and improving the safety of crutches.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.

The structures, proportions, sizes, etc. shown in this manual are only used to cooperate with the content disclosed in the manual, so that people familiar with this technology can understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no technical In the substantive meaning above, any modification of structure, change of proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and goals that can be achieved by the present invention. within the scope covered.

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Figure 2 is an enlarged view of A in Figure 1;

Fig. 3 is a schematic structural view of the limiting device in Embodiment 1 of the present invention;

4 is a schematic structural view of the length adjusting device in Embodiment 2 of the present invention;

Fig. 5 is a schematic diagram of the folding structure in Embodiment 3 of the present invention;

FIG. 6 is an enlarged view of B in FIG. 5 .

Among the figure: 1, rod, 2, support rod, 3, guide hole, 4, moving rod, 5, handle, 6, first spring, 7, second spring, 8, sleeve pipe, 9, telescopic rod, 10 , limit piece, 11, rubber pad, 12, L-shaped warping rod, 13, cavity, 14, first through hole, 15, fixed shaft, 16, adjustment tube, 17, adjustment hole, 18, card slot, 19 , the second through hole, 20, the third through hole, 21, the fixed column, 22, the adjustment column, 23, the third spring, 24, the fourth spring, 25, the ring, 101, the first rod, 102, the first Two rods, 103, groove, 104, bearing, 105, connecting rod, 106, cylinder, 107, chain.

Detailed ways

The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

The first aspect of the embodiment of the present invention provides a multifunctional crutch, as shown in Figure 1, comprising:

rod 1;

A support rod 2, the bottom end of the support rod 2 is fixedly connected to the top end of the rod 1, the top end of the support rod 2 is provided with a guide hole 3, and the guide hole 3 extends along the axial direction of the support rod 2;

Moving rod 4, one end of the moving rod 4 is inserted into the upper end of the guide hole 3, the other end of the moving rod 4 is fixedly connected to the handle 5, and the moving rod 4 can reciprocate up and down in the guide hole 3, so A first spring 6 is arranged between the lower end of the moving rod 4 and the bottom wall of the guide hole 3, one end of the first spring 6 is fixedly connected to the bottom wall of the guide hole 3, and the other end of the first spring 6 is connected to the bottom wall of the guide hole 3. The bottom end of the moving rod 4 is fixedly connected, the first spring 6 is sleeved with a second spring 7, one end of the second spring 7 is fixedly connected to the lower end of the moving rod 4, and the other end of the second spring 7 Fixedly connected with the bottom wall of the guide hole 3, the first spring 6 is in a compressed state, and the second spring 7 is in a stretched state.

The working principle of the above-mentioned technical solution is: when the old man is walking, hold the handle 5 with his hand, and support it through the bottom end of the rod 1 touching the ground, so as to maintain the balance in the walking process. Impact, at this time, the external force will be transmitted to the handle 5 through the old man's body. In order to maintain balance, the old man will apply downward pressure on the handle 5. Under the action of the pressure, the lower end of the moving rod 4 will move in the direction Down movement, at the same time, compress the first spring 6, through the buffering effect of the spring, reduce the impact of the force on the support rod 2, reduce the reaction force applied to the old man, and play a role in protecting the old man. , the moving rod 4 produces a large displacement downward, so that the second spring 7 exceeds the equilibrium position, and changes from a stretched state to a compressed state, so that the first spring 6 and the second spring 7 are compressed at the same time for buffering. The rigidity will become very large, therefore, no large displacement will be generated under a large impact force, and while the impact force is buffered, it prevents the elderly from falling and falling due to excessive changes in the buffer displacement.

The beneficial effect of the above-mentioned technical solution is: through the combination of the first spring 6 and the second spring 7, the crutch can play a buffering role in the case of a small impact force and a large impact force during use, and the displacement There will not be a large change in buffer displacement, and the buffer effect will be more gentle. During the walking process, it will be impacted by force. When the crutches are buffered, there will be no large up and down shaking. Safety of use.

In one implementation, as shown in Figure 2-3, a limiting device is also provided in the guide hole 3, and the limiting device includes:

A sleeve 8 is arranged in the second spring 7, one end of the sleeve 8 is fixedly connected to the lower end of the moving rod 4, the other end of the sleeve 8 extends vertically downward, and the lower end of the sleeve 8 is set has ring 25;

The telescopic rod 9 is arranged in the second spring 7, one end of the telescopic rod 9 is inserted into the sleeve 8 through the ring 25, and the upper end of the telescopic rod 9 is provided with a limiting plate 10, so that The limiting piece 10 is circular, the diameter of the limiting piece 10 is larger than the diameter of the inner ring of the ring 25 , and the other end of the telescopic rod 9 is fixedly connected to the bottom wall of the guide hole 3 .

The beneficial effect of the above technical solution is: during the use of crutches, the telescopic rod 9 will reciprocate up and down in the casing 8 under the impact of external force, which plays a role in strengthening the movable connection between the moving rod 4 and the support rod 2, making the movement more flexible. Stable; in addition, the circular ring 25 has a blocking effect on the limit piece 10, preventing the telescopic rod 9 from moving out of the casing 8 and exceeding the limit displacement.

In one implementation, as shown in FIG. 1 , a rubber pad 11 is provided at the bottom end of the rod 1 .

The beneficial effect of the above technical solution is: the rubber pad has good elasticity, and plays a shock-absorbing role in contacting the bottom end of the rod with the ground.

Example 2

The first aspect of the embodiment of the present invention provides another multifunctional crutch. As shown in FIG. 4 , the handle 5 is provided with a length adjustment device, and the length adjustment device includes:

L-shaped warping rod 12, the handle 5 is in the shape of a cuboid, the handle 5 is arranged in a horizontal direction, a cavity 13 is arranged inside the handle 5, and a first through hole is provided at the intersection of the L-shaped warping rod 12 14. The fixed shaft 15 passes through the first through hole 14, the L-shaped lever 12 can rotate around the fixed shaft 15, and the two ends of the fixed shaft 15 are connected to the inner wall of the cavity 13 on both sides. Fixedly connected, the bottom of the outer wall of the handle 5 is provided with a second through hole 19, and the second through hole 19 extends along the vertical direction;

An adjustment tube 16, one end of the adjustment tube 16 is fixedly connected to the bottom of the handle 5, the upper end of the adjustment tube 16 communicates with the cavity 13, the upper end of the moving rod 4 is provided with an adjustment hole 17, the adjustment The hole 17 extends along the axial direction of the moving rod 4, and the inner wall of the adjustment hole 17 is evenly spaced with a number of slots 18 from top to bottom. One end of the L-shaped lever 12 extends into the handle 5 away from the One end of the adjusting tube 16, the other end of the L-shaped warping rod 12 extends to the lower end of the adjusting tube 16, the outer wall of the lower end of the adjusting tube 16 is provided with a third through hole 20, the lower end of the adjusting tube 16 Inserted into the adjustment hole 17, and can reciprocate up and down;

The fixed post 21 is arranged at the lower end of the L-shaped warp bar 12, one end of the fixed post 21 is fixedly connected with the lower end of the L-shaped warped bar 12, and the other end of the fixed post 21 passes through the third through hole 20 is mounted in the card slot 18;

An adjustment column 22 is arranged on the other end of the L-shaped warp 12, one end of the adjustment column 22 is fixedly connected with the L-shaped warp 12, and the other end of the adjustment column 22 passes through the second through hole 19 extending below the handle 5;

The third spring 23 is arranged in the cavity 13 , one end of the third spring 23 is fixedly connected to the upper end of the adjustment column 22 , and the other end of the third spring 23 is fixedly connected to the top of the inner wall of the cavity 13 .

The working principle of the above technical solution is: when the length of the crutch needs to be adjusted, hold the handle 5 with your hand, and press the adjustment column 22 with your fingers, so that the right end of the L-shaped lever 12 moves upward, and the intersection point of the L-shaped lever 12 is It will rotate counterclockwise around the fixed shaft 15, and the lower end of the L-shaped warping rod 12 will drive the fixed column 21 to move to the right, so that the fixed column 21 moves out of the slot 18. At this time, the adjustment tube 16 can move up and down along the adjustment hole 17 , when it moves to the desired length, the finger releases the adjusting column 22, and under the action of the elastic force of the third spring 23, the adjusting column 22 moves downward, the right end of the L-shaped warping rod 12 moves downward, and the L-shaped warping rod 12 The intersection point will rotate clockwise around the fixed shaft 15, and the lower end of the L-shaped warping rod 12 will drive the fixed column 21 to move to the left, so that the fixed column 21 will pass through the third through hole 20 and be inserted into the corresponding card slot 18. The fixing of adjustment tube 16 and travel bar 4 has just completed the adjustment of crutch length.

The beneficial effects of the above technical solution are: the length adjustment device can adapt to the length needs of different elderly people, and can also adjust the length of the crutches according to the terrain, so as to facilitate the adjustment of the length of the crutches in different situations.

In one implementation, as shown in FIG. 4 , a fourth spring 24 is provided in the adjustment hole 17 , one end of the fourth spring 24 is fixedly connected to the bottom end of the adjustment tube 16 , and the other end of the fourth spring 24 It is fixedly connected with the bottom wall of the adjustment hole 17 .

The beneficial effect of the above technical solution is: when the old man needs to adjust the length of the crutch to be shortened during walking, press the adjustment post 22 with his hand, then press the handle 5 downwards to reach a suitable length, and release the adjustment post 22 That is, when the length of the crutch needs to be adjusted to become longer, press the adjusting column 22 with your hand, and then under the elastic force of the fourth spring 24, push the adjusting tube 16 to move upward to reach the required length, and then loosen the adjusting column 22 can be used fixedly, and the length of the cane can be quickly adjusted during walking, making the adjustment more convenient and faster.

Example 3

As shown in Figures 5-6, the rod 1 is composed of a first rod 101 and a second rod 102, the upper end of the first rod 101 is fixedly connected with the bottom end of the support rod 2, and the first The lower end of the rod 101 is provided with a groove 103, the inner wall of the groove 103 is provided with an internal thread, the bottom of the groove 103 is fixedly installed with a bearing 104, and a connecting rod 105 is arranged in the groove 103, and the connecting rod 105 is arranged inside the groove 103. One end of the rod 105 is fixedly connected to the inner ring of the bearing 104, and the other end of the connecting rod 105 extends vertically downward;

The top of the second rod 102 is provided with a cylinder 106, the outer wall of the cylinder 106 is provided with external threads, one end of the chain 107 is fixedly connected with the top of the cylinder 106, and the other end of the chain 107 is connected with the connecting rod 105 The lower end is fixedly connected.

The beneficial effect of the above technical solution is: the cylinder 106 is installed in the groove 103 through threaded connection, which can quickly realize the assembly or disassembly of the first rod 101 and the second rod 102, which is convenient for the storage of the crutches when they are not in use, and is convenient for saving space. The flexible connection is realized by the chain 107 to prevent the loss of components. When the cylinder 106 is rotated and installed on the inner wall of the groove 103, the chain 107 will also rotate and drive the connecting rod 105 to rotate, and the connecting rod 105 will be in the bearing 104. Rotation, thereby avoiding the winding, knotting and jamming of the chain, making the disassembly and assembly smoother.

The second aspect of the embodiment of the present invention provides a method for manufacturing a multifunctional crutch, which is manufactured according to the following steps:

Step 1. Weld the upper end of the rod 1 with the end of the support rod 2, and weld the end of the moving rod 4 with the bottom of the handle 5;

Step 2, drilling the pilot hole 3 on the upper end surface of the support rod 2;

Step 3, put the first spring 6 on the second spring 7, and weld the lower ends of the first spring 6 and the second spring 7 to the bottom wall of the guide hole 3;

Step 4, stretch the upper ends of the first spring 6 and the second spring 7 upwards out of the guide hole 3, and respectively weld and fix them with the lower end of the moving rod 4, and then insert the lower end of the moving rod 4 into the guide hole 3, so that The first spring 6 is in a compressed state, while the second spring 7 is in a stretched state.

The beneficial effects of the above technical solution are: the crutches are manufactured by the above process method, the process flow is simple, the processing efficiency is high, and the processing cost is reduced.

Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (7)

1. A kind of multifunctional crutch, is characterized in that, comprises: rod; A support rod, the bottom end of the support rod is fixedly connected to the top end of the rod, the top end of the support rod is provided with a guide hole, and the guide hole extends along the axial direction of the support rod; A moving rod, one end of the moving rod is inserted into the upper end of the guide hole, the other end of the moving rod is fixedly connected to the handle, the moving rod can reciprocate up and down in the guiding hole, the lower end of the moving rod is connected to the A first spring is arranged between the bottom walls of the guide holes, one end of the first spring is fixedly connected to the bottom wall of the guide hole, and the other end of the first spring is fixedly connected to the bottom end of the moving rod. A second spring is sheathed in the spring, one end of the second spring is fixedly connected to the lower end of the moving rod, the other end of the second spring is fixedly connected to the bottom wall of the guide hole, the first spring is in a compressed state, The second spring is in tension. 2. The multifunctional crutch according to claim 1, wherein a limiting device is also provided in the guide hole, and the limiting device comprises: A sleeve, arranged in the second spring, one end of the sleeve is fixedly connected to the lower end of the moving rod, the other end of the sleeve extends vertically downward, and a ring is provided at the lower end of the sleeve; The telescopic rod is arranged in the second spring, one end of the telescopic rod is inserted into the sleeve through the ring, the upper end of the telescopic rod is provided with a limiting piece, and the limiting piece is circular, The diameter of the limiting piece is larger than the diameter of the inner ring of the ring, and the other end of the telescopic rod is fixedly connected to the bottom wall of the guide hole. 3. The multifunctional crutch according to claim 1, wherein a rubber pad is provided at the bottom end of the rod. 4. A kind of multifunctional crutch according to claim 1, is characterized in that, described handle is provided with length adjustment device, and described length adjustment device comprises: The L-shaped warping rod, the handle is in the shape of a cuboid, the handle is arranged in the horizontal direction, and a cavity is arranged in the handle, the intersection of the L-shaped warping rod is provided with a first through hole, and the fixed shaft passes through the The first through hole is described, the L-shaped warping rod can rotate around the fixed shaft, the two ends of the fixed shaft are fixedly connected with both sides of the inner wall of the cavity, and the bottom of the outer wall of the handle is provided with a second two through holes, the second through holes extending along the vertical direction; An adjustment tube, one end of the adjustment tube is fixedly connected to the bottom of the handle, the upper end of the adjustment tube communicates with the cavity, the upper end of the moving rod is provided with an adjustment hole, and the adjustment hole is along the Extending in the axial direction, the inner wall of the adjustment hole is uniformly provided with a number of slots from top to bottom, one end of the L-shaped warping rod extends to the end of the handle away from the adjustment tube, and the other end of the L-shaped warping rod Extending to the lower end of the adjustment tube, the outer wall of the lower end of the adjustment tube is provided with a third through hole, the lower end of the adjustment tube is inserted into the adjustment hole, and can reciprocate up and down; The fixed column is arranged at the lower end of the L-shaped warp bar, one end of the fixed column is fixedly connected with the lower end of the L-shaped warped bar, and the other end of the fixed post passes through the third through hole and is clamped on the in the card slot; An adjustment column is arranged on the other end of the L-shaped lever, one end of the adjustment column is fixedly connected to the L-shaped lever, and the other end of the adjustment column extends to the handle through the second through hole below; The third spring is arranged in the cavity, one end of the third spring is fixedly connected to the upper end of the adjustment column, and the other end of the third spring is fixedly connected to the top of the inner wall of the cavity. 5. The multifunctional crutch according to claim 4, wherein a fourth spring is arranged in the adjustment hole, one end of the fourth spring is fixedly connected to the bottom end of the adjustment tube, and the fourth spring The other end of the spring is fixedly connected with the bottom wall of the adjustment hole. 6. The multifunctional crutch according to claim 1, characterized in that, the rod is composed of a first rod and a second rod, The upper end of the first rod is fixedly connected to the bottom end of the support rod, the lower end of the first rod is provided with a groove, the inner wall of the groove is provided with internal threads, and the bottom of the groove is fixedly installed with a bearing , a connecting rod is arranged in the groove, one end of the connecting rod is fixedly connected to the inner ring of the bearing, and the other end of the connecting rod extends vertically downward; The top end of the second rod is provided with a cylinder, the outer wall of the cylinder is provided with external threads, one end of the chain is fixedly connected to the top end of the cylinder, and the other end of the chain is fixedly connected to the lower end of the connecting rod. 7. A manufacturing method of the multifunctional crutch according to claim 1, characterized in that, it is manufactured according to the following steps: Step 1. Weld the upper end of the rod to the end of the support rod, and weld the end of the moving rod to the bottom of the handle; Step 2. Drill pilot holes on the upper surface of the support rod; Step 3, put the first spring on the second spring, and weld the lower ends of the first spring and the second spring to the bottom wall of the guide hole; Step 4. Pull the upper ends of the first spring and the second spring upwards out of the guide hole, and weld them to the lower end of the moving rod respectively, and then insert the lower end of the moving rod into the guide hole so that the first spring is in a compressed state , while the second spring is in tension.