Drawing storage type handheld rotating cylinder

Abstract

The utility model provides a drawing storage type handheld rotating cylinder, and relates to the technical field of religious stationery commodities. According to the technical scheme, the drawing storage type handheld rotating cylinder comprises a cylinder body, and an opening is formed in the cylinder body; the barrel is rotatably mounted on the main shaft; the handpiece is fixedly connected with the other end of the main shaft; the elastic reset mechanism comprises an elastic reset piece and a mounting pipe, the main shaft is sleeved with the elastic reset piece, and the elastic reset piece is sleeved with the mounting pipe; and one side of the flexible rolling piece is connected with the mounting pipe, the other side of the flexible rolling piece is wound along the outer side of the mounting pipe and penetrates through the opening in the cylinder body to be located outside the cylinder body, and a balance weight traction piece is arranged on the other side of the flexible rolling piece. The utility model relates to a flexible roll piece storage barrel, and aims to utilize an elastic reset mechanism to enable a user to conveniently pull out a flexible roll piece in the barrel as required to look up contents recorded on the flexible roll piece and realize automatic storage of the flexible roll piece through the elastic reset mechanism after the contents are looked up.

Description

Technical Field

[0001] The utility model relates to the technical field of religious cultural products, in particular to a pull-out and storage type handheld rotating cylinder. Background Art

[0002] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: in general hand-cranked prayer wheels, the reel is installed inside the prayer wheel, and Buddhist scriptures, mantras or prayers are written on the reel. When the user needs to view the contents recorded on the reel inside the prayer wheel, the upper part of the prayer wheel needs to be disassembled and the reel needs to be taken out before the user can view the contents. This makes it inconvenient for the user to view the contents on the reel when needed. Utility Model Content

[0003] The utility model aims to provide a pull-out storage type hand-held rotating drum. By utilizing an elastic reset mechanism, a user can conveniently pull out a flexible roll in the drum when needed, check the contents recorded on the flexible roll, and after checking, the flexible roll can be automatically stored by the elastic reset mechanism.

[0004] The inventor has made continuous innovations through long-term exploration and attempts, as well as multiple experiments and efforts, to solve the above technical problems. The technical solution provided by the utility model is:

[0005] The cam is configured to move the handle of the lever arm to a position that is adapted to move the lever arm in a direction of rotation from one end of the lever to the other end of the lever arm, the cam being configured to move the lever arm in a direction of rotation from one end of the lever arm to the other end of the lever arm.

[0006] In some embodiments of the utility model, a first bearing component and a second bearing component are sleeved on the main shaft, the first bearing component is located at the top of the cylinder, the inner side of the first bearing component is connected to the main shaft, the outer side of the first bearing component is connected to the cylinder, the second bearing component is located at the bottom of the cylinder, the inner side of the second bearing component is connected to the main shaft, and the outer side of the second bearing component is connected to the cylinder.

[0007] In some embodiments of the utility model, the elastic return member includes a first return spring, a first fixing member and a third bearing member, one end of the first return spring is connected to the inner side of the top of the cylinder, the other end of the first return spring is connected to the upper part of the first fixing member, and the third bearing member is respectively connected to the inner side of the bottom of the cylinder and the lower part of the first fixing member.

[0008] In some embodiments of the present invention, a second fixing piece is provided on one end of the first return spring, and the second fixing piece is connected to the inner side of the top of the cylinder.

[0009] In some embodiments of the utility model, a fixing strip is further included, wherein the fixing strip is provided with at least two fixing holes, and the outer side wall of the mounting tube is provided with at least two fixing buckles arranged in the vertical direction, and the fixing strip cooperates with the fixing buckles on the mounting tube through the fixing holes to press one side of the flexible roll against the side wall of the mounting tube.

[0010] In some embodiments of the present invention, a plurality of openings are provided on the side wall of the mounting tube.

[0011] In some embodiments of the utility model, the cylinder body includes a cylinder body, an upper cylinder cover and a lower cylinder cover, one end of the cylinder body is connected to the upper cylinder cover, the other end of the cylinder body is connected to the lower cylinder cover, and the opening is arranged on the cylinder body.

[0012] In some embodiments of the present invention, a clamping tube is provided on the other side of the flexible coil, and the counterweight traction member is installed on the clamping tube.

[0013] In some embodiments of the utility model, a mounting portion connected from one end to the other end is provided on the other side of the flexible roll, a support is provided inside the mounting portion, and the clamping tube sleeve is provided on the mounting portion of the flexible roll.

[0014] In some embodiments of the utility model, detachable limit heads are respectively provided at both ends of the support member, and limit blocks matching with the limit heads are respectively provided at the top and the bottom of the cylinder.

[0015] In some embodiments of the utility model, the hand-held component includes a handle shaft and a hand-held rod, the hand-held rod is provided with a mounting slot, and the hand-held rod is sleeved on the handle shaft through the mounting slot; it also includes a second return spring, the second return spring is sleeved on the handle shaft, the hand-held rod is located on the upper inner side of the mounting slot and is provided with a first limit mounting platform, one end of the second return spring is against the first limit mounting platform, the lower part of the handle shaft is provided with a second limit mounting platform, the other end of the second return spring is against the second limit mounting platform, the bottom of the main shaft is provided with a limit platform against the upper part of the hand-held rod, the lower part of the limit platform is provided with a connecting head, and the main shaft is hinged to the upper part of the hand-held shaft through the connecting head.

[0016] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0017] a) The utility model adopts an elastic reset mechanism, so that the user can pull out the flexible roll inside the cylinder body when necessary to check the content recorded on the flexible roll, and after checking, the elastic reset mechanism automatically resets the flexible roll back into the cylinder body, so as to realize the automatic storage of the flexible roll;

[0018] b) The utility model adopts a first return spring, a first fixing member and a third bearing member to form an elastic return member, which is convenient for cooperating with the cylinder to apply a preset design torque to the first return spring during production;

[0019] c) The utility model adopts a handle shaft, a hand-held rod and a second return spring to form a hand-held piece, and the handle shaft and the hand-held rod are hinged so that the hand-held piece can be folded and stored relative to the main axis, which is more convenient for users to carry and improves the appearance and comfort when worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the pull-out and storage-type hand-held rotating drum according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic cross-sectional structure diagram of the main body of the pull-out and storage-type hand-held rotating drum according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the elastic reset mechanism and the flexible coil in the embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the cylindrical part of the embodiment of the utility model in the state of storing the flexible coil.

[0025] Figure 5 This is a schematic diagram of the structure of the installation tube and the fixing strip according to the embodiment of the utility model.

[0026] Figure 6 It is a schematic diagram of the explosion structure of the cylinder part of the embodiment of the utility model.

[0027] Figure 7This is a schematic diagram of the structure of the flexible coil of the cylinder part of the embodiment of the utility model in a stretched state.

[0028] Figure 8 It is a schematic diagram of the exploded structure of the flexible coil according to the embodiment of the utility model.

[0029] Fig. 9 It is a schematic cross-sectional structural diagram of the handpiece in a locked state according to an embodiment of the utility model.

[0030] Fig.10 It is a schematic cross-sectional structural diagram of the hand-held rod on the hand-held piece according to an embodiment of the utility model sliding relative to the handle shaft.

[0031] Fig.11 It is a schematic cross-sectional structure diagram of the handpiece rotating relative to the main shaft according to an embodiment of the utility model.

[0032] Icons: 100- cylinder body, 110- cylinder body, 111- opening, 120- upper cylinder cover, 130- lower cylinder cover, 140- limit block, 200- spindle, 210- first bearing, 220- second bearing, 230- limit platform, 240- connector, 300- hand piece, 310- handle shaft, 311- second limit mounting platform, 320- hand rod, 321- mounting slot, 322- first limit mounting platform, 33 0-second return spring, 400-elastic return mechanism, 411-first return spring, 412-first fixing member, 413-third bearing member, 414-second fixing member, 420-mounting tube, 421-fixing buckle, 422-opening, 500-flexible coil, 510-clamping tube, 511-counterweight traction member, 520-mounting part, 530-support member, 531-limiting head, 600-fixing strip, 610-fixing hole. DETAILED DESCRIPTION

[0033] Example 1

[0034] Please refer to Figures 1 to 4, a pull-out and retractable hand-held rotating cylinder described in this embodiment includes a cylinder body 100, which is a cylindrical cylinder with a hollow interior, and an opening 111 is provided on the cylinder body 100, and the opening 111 is opened in a vertical direction on the side wall surface of the cylinder body 100; a main shaft 200, the cylinder body 100 is rotatably mounted on the main shaft 200, one end of the main shaft 200 is located at the top of the cylinder body 100, and the other end of the main shaft 200 passes through the bottom of the cylinder body 100 and is located outside the cylinder body 100; a handpiece 300, the handpiece 300 is fixedly connected to the other end of the main shaft 200; an elastic reset mechanism 400, the elastic reset mechanism 400 includes an elastic reset member and a mounting tube 420, the elastic reset member is sleeved on the main shaft 200, one end of the elastic reset member is located at the bottom inside the cylinder body 100, the other end of the elastic reset member is connected to the top of the cylinder body 100, and the mounting tube 420 is installed The tube 420 is sleeved on the elastic reset member, one end of the mounting tube 420 is connected to one end of the elastic reset member, and the other end of the mounting tube 420 is located at the top inside the cylinder 100; a flexible roll 500, one side of the flexible roll 500 is connected to the mounting tube 420, the other side of the flexible roll 500 is wound along the outer side of the mounting tube 420 and passes through the opening 111 on the cylinder 100 and is located outside the cylinder 100, a counterweight traction member 511 is provided on the other side of the flexible roll 500, in this embodiment, the flexible roll 500 is made of cotton cloth, in addition, when manufacturing this embodiment, the user can choose paper, silk, leather, satin, similar fabrics, etc. according to needs to make a flexible roll 500 that can meet the use requirements of this embodiment, the counterweight traction member 511 includes a connecting chain and a counterweight ball, and the connecting chain is a lock chain, which is convenient for the user to adjust the length of the connecting chain according to needs.

[0035] When using this embodiment, the user can hold the handpiece 300 and swing it, and use the centrifugal force generated by the counterweight traction member 511 to drive the flexible scroll 500, the mounting tube 420 and the elastic reset member in turn, and finally drive the cylinder 100 to rotate with the first rotation as the axis. When the user is in use, since the elastic reset member has a preset torque, it can ensure that the flexible scroll 500 will not be pulled out of the cylinder 100 under the pulling of the counterweight traction member 511. When the user needs to check the content recorded on the flexible scroll 500, the user can stop rotating, hold the handpiece 300 with one hand, hold the counterweight traction member 511 with the other hand, and pull the counterweight traction member 511 in one direction, so that the flexible scroll 500 in the cylinder 100 can be pulled out of the cylinder 100 from the opening 111, which is convenient for use. The user checks the contents recorded on the flexible roll 500; in the process of pulling the flexible roll 500 out of the cylinder 100, the flexible roll 500 will drive the mounting tube 420 to rotate, and the mounting tube 420 will then drive the elastic reset member to rotate, causing the elastic reset member to generate a corresponding reset torque. After checking, the user slowly releases the pulling force applied to the counterweight traction member 511, and uses the reset torque of the elastic reset member to drive the mounting tube 420, so that the flexible roll 500 is wound on the mounting tube 420 again, thereby realizing automatic storage of the roll.

[0036] In this embodiment, a first bearing member 210 and a second bearing member 220 are sleeved on the main shaft 200, the first bearing member 210 is located at the top of the cylinder 100, the inner side of the first bearing member 210 is connected to the main shaft 200, the outer side of the first bearing member 210 is connected to the cylinder 100, the second bearing member 220 is located at the bottom of the cylinder 100, the inner side of the second bearing member 220 is connected to the main shaft 200, and the outer side of the second bearing member 220 is connected to the cylinder 100. In this embodiment, the first bearing member 210 and the second bearing member 220 are arranged between the main shaft 200 and the cylinder 100, so that the cylinder 100 can rotate relative to the main shaft 200.

[0037] In this embodiment, the elastic return member includes a first return spring 411, a first fixing member 412 and a third bearing member 413, one end of the first return spring 411 is connected to the inner side of the top of the cylinder 100, the other end of the first return spring 411 is connected to the upper part of the first fixing member 412, and the third bearing member 413 is respectively connected to the inner side of the bottom of the cylinder 100 and the lower part of the first fixing member 412. In this embodiment, a corresponding reset torque is set during the assembly of the elastic reset member. The first fixing member 412 is a spring fixing plug. The lower end of the first reset spring 411 is mounted on the first fixing member 412. The first fixing member 412 is mounted on the third bearing member 413. The third bearing member 413 is mounted on the inner side of the bottom of the cylinder 100. The lower end of the mounting tube 420 is connected to the first fixing member 412. The third bearing member 413 is used to realize the rotation of the elastic reset mechanism 400 relative to the cylinder 100. The cylinder 100 is fixed, and then the first reset spring 411 is rotated. The first reset spring 411 drives the first fixing member 412 to rotate on the third bearing member 413. The first fixing member 412 drives the mounting tube 420 to rotate. When the mounting tube 420 rotates, the flexible roll 500 is wound thereon. After the winding is tight,

[0038] In this embodiment, the counterweight traction piece 511 on the flexible roll 500 will be stuck on the opening 111 on the cylinder 100, making the flexible roll 500, the mounting tube 420 and the first fixing piece 412 unable to rotate. In this state, continuing to twist the upper end of the first return spring 411 can increase the number of turns of the first return spring 411, reduce the diameter, and increase the torque accordingly. After reaching the required torque, the upper end of the first return spring 411 is fixedly installed on the top of the cylinder 100, so that the first return spring 411 has a certain inward pulling force on the flexible roll 500 through the first fixing piece 412 and the mounting tube 420 in turn. After the flexible roll 500 is pulled outward to the outside of the cylinder 100, the flexible roll 500 is released, and the first return spring 411 can automatically pull the flexible roll 500 back into the cylinder 100 through its own return torque.

[0039] In this embodiment, a second fixing member 414 is provided on one end of the first return spring 411, and the second fixing member 414 is connected to the inner side of the top of the cylinder 100. In this embodiment, the second fixing member 414 is a spring fixing hoop, and the second fixing member 414 is installed on the upper end of the first return spring 411, so that the user can fix the upper end of the elastic return mechanism 400 on the inner side of the top of the cylinder 100.

[0040] Example 2

[0041] Please refer to Figure 5 The pull-out and retractable hand-held rotating drum described in this embodiment is a further technical solution of the above-mentioned embodiment 1, and the difference is that:

[0042] In this embodiment, a fixing pressure strip 600 is further included, and at least two fixing holes 610 are provided on the fixing pressure strip 600. At least two fixing buckles 421 arranged in the vertical direction are provided on the outer side wall of the mounting tube 420. The fixing pressure strip 600 cooperates with the fixing buckles 421 on the mounting tube 420 through the fixing holes 610 to press one side of the flexible roll 500 against the side wall of the mounting tube 420. In this embodiment, the flexible roll 500 is pressed between the fixing pressure strip 600 and the outer side wall of the mounting tube 420, which is convenient for the user to disassemble and assemble the flexible roll 500 on the mounting tube 420, and the flexible roll 500 of different types and different recorded contents can also be replaced as needed.

[0043] In this embodiment, a plurality of openings 422 are provided on the side wall of the mounting tube 420, which facilitates the casting of the mounting tube 420 during production and can reduce the weight of the mounting tube 420, thereby reducing the overall weight of the product and improving portability.

[0044] Example 3

[0045] Please refer to Figure 6 The pull-out and retractable hand-held rotating drum described in this embodiment is a further technical solution of any of the above-mentioned embodiments, and the difference is that:

[0046] In this embodiment, the cylinder body 100 includes a cylinder body 110, an upper cylinder cover 120 and a lower cylinder cover 130. One end of the cylinder body 110 is connected to the upper cylinder cover 120, and the other end of the cylinder body 110 is connected to the lower cylinder cover 130. The opening 111 is set on the cylinder body 110. The cylinder body 100 is composed of a three-part structure of the cylinder body 110, the upper cylinder cover 120 and the lower cylinder cover 130, which is convenient for early assembly and later disassembly and assembly during component inspection and replacement.

[0047] Example 4

[0048] Please refer to Figure 7 and Figure 8 The pull-out and retractable hand-held rotating drum described in this embodiment is a further technical solution of any of the above-mentioned embodiments, and the difference is that:

[0049] In this embodiment, a clamping tube 510 is provided on the other side of the flexible coil 500, and the counterweight traction member 511 is installed on the clamping tube 510. The clamping tube 510 is a round tube with a "C"-shaped cross section. The clamping tube 510 is installed on the other side of the flexible coil 500. Since the diameter of the clamping tube 510 is larger than the size of the opening 111 on the cylinder 100, the clamping tube 510 and the opening 111 on the cylinder 100 are abutted against each other, so that the flexible coil 500 can be prevented from completely entering the cylinder 100 and being difficult to remove. In addition, in this embodiment, a mounting ring is provided on the clamping tube 510, and the counterweight traction member 511 is mounted on the mounting ring of the clamping tube 510, so that the counterweight traction member 511 can be easily disassembled and assembled.

[0050] In this embodiment, a mounting portion 520 connected from one end to the other end is provided on the other side of the flexible roll 500, and a support member 530 is provided inside the mounting portion 520. The clamping tube 510 is sleeved on the mounting portion 520 of the flexible roll 500. The mounting portion 520 is a mounting groove 321 on the other side of the flexible roll 500. The support member 530 is provided in the mounting portion 520, which can stretch and straighten the other side of the flexible roll 500 to increase the aesthetics of the product. In addition, the support member 530 has a limiting effect on the clamping tube 510, and can also prevent the clamping tube 510 from detaching from the flexible roll 500 due to the force of the traction counterweight during use.

[0051] In this embodiment, detachable limit heads 531 are respectively provided at both ends of the support member 530. The limit heads 531 at both ends of the support member 530 can prevent the support member 530 from being separated from the mounting portion 520 of the flexible roll 500. The top and bottom of the cylinder 100 are respectively provided with limit blocks 140 that cooperate with the limit heads 531. The limit heads 531 are clamped in the limit blocks 140, which can increase the stability of the overall structure during use and prevent the clamping tube 510 on the other side of the flexible roll 500 from shaking during use and affecting the user experience.

[0052] Example 5

[0053] Please refer to Figures 9 to 11 The pull-out and retractable hand-held rotating drum described in this embodiment is a further technical solution of any of the above-mentioned embodiments, and the difference is that:

[0054] In this embodiment, the hand piece 300 includes a handle shaft 310 and a hand rod 320, and the hand rod 320 is provided with a mounting slot 321, and the hand rod 320 is sleeved on the handle shaft 310 through the mounting slot 321; it also includes a second return spring 330, and the second return spring 330 is sleeved on the handle shaft 310. The hand rod 320 is located on the upper inner side of the mounting slot 321 and is provided with a first limit mounting platform 322. One end of the second return spring 330 is against the first limit mounting platform 322. The lower part of the handle shaft 310 is provided with a second limit mounting platform 311, and the other end of the second return spring 330 is against the second limit mounting platform 311. The bottom of the main shaft 200 is provided with a limit platform 230 that is against the upper part of the hand rod 320, and the lower part of all the limit platforms 230 is provided with a connecting head 240, and the main shaft 200 is hinged to the upper part of the hand shaft through the connecting head 240.

[0055] When this embodiment is in use, the hand-held rod 320 can be pressed down to make it slide downward relative to the handle shaft 310. At this time, the second return spring 330 is compressed. When the upper part of the hand-held rod 320 exposes the connecting head 240 on the main shaft 200 and the hinged part of the upper part of the hand-held shaft, the hand-held piece 300 can be rotated relative to the main shaft 200. The user can adjust the hand-held piece 300 to a suitable position according to their own needs, making it more beautiful and comfortable to wear.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pull-out and retractable hand-held rotating drum, comprising a drum body, wherein the drum body is provided with an opening; A main shaft, the cylinder is rotatably mounted on the main shaft, one end of the main shaft is located at the top of the cylinder, and the other end of the main shaft passes through the bottom of the cylinder and is located outside the cylinder; A hand piece, the hand piece is fixedly connected to the other end of the main shaft; The invention is characterized in that it also includes an elastic reset mechanism, which includes an elastic reset member and a mounting tube, wherein the elastic reset member is sleeved on the main shaft, one end of the elastic reset member is located at the bottom of the cylinder, and the other end of the elastic reset member is connected to the top of the cylinder, and the mounting tube is sleeved on the elastic reset member, one end of the mounting tube is connected to one end of the elastic reset member, and the other end of the mounting tube is located at the top of the cylinder; A flexible roll, one side of which is connected to the mounting tube, the other side of which is wound along the outer side of the mounting tube and passes through the opening on the cylinder to be located outside the cylinder, and a counterweight traction member is provided on the other side of the flexible roll.

2. A pull-out storage hand-held rotating drum according to claim 1, It is characterized in that The main shaft is sleeved with a first bearing component and a second bearing component, the first bearing component is located at the top of the cylinder, the inner side of the first bearing component is connected to the main shaft, the outer side of the first bearing component is connected to the cylinder, the second bearing component is located at the bottom of the cylinder, the inner side of the second bearing component is connected to the main shaft, and the outer side of the second bearing component is connected to the cylinder.

3. The pull-out and retractable hand-held rotating drum according to claim 1, It is characterized in that The elastic return member includes a first return spring, a first fixing member and a third bearing member, one end of the first return spring is connected to the inner side of the top of the cylinder, the other end of the first return spring is connected to the upper part of the first fixing member, and the third bearing member is respectively connected to the inner side of the bottom of the cylinder and the lower part of the first fixing member.

4. The pull-out and retractable hand-held rotating drum according to claim 3, It is characterized in that A second fixing piece is provided on one end of the first return spring, and the second fixing piece is connected to the inner side of the top of the cylinder.

5. The pull-out and retractable hand-held rotating drum according to claim 1, It is characterized in that It also includes a fixing strip, which is provided with at least two fixing holes, and the outer side wall of the mounting tube is provided with at least two fixing buckles arranged in the vertical direction. The fixing strip cooperates with the fixing buckles on the mounting tube through the fixing holes to press one side of the flexible roll against the side wall of the mounting tube.

6. The pull-out and retractable hand-held rotating drum according to claim 1, It is characterized in that The cylinder body comprises a cylinder body, an upper cylinder cover and a lower cylinder cover, one end of the cylinder body is connected to the upper cylinder cover, the other end of the cylinder body is connected to the lower cylinder cover, and the opening is arranged on the cylinder body.

7. The pull-out and retractable hand-held rotating drum according to claim 1, It is characterized in that A clamping tube is arranged on the other side of the flexible coil, and the counterweight traction member is installed on the clamping tube.

8. The pull-out and retractable hand-held rotating drum according to claim 7, It is characterized in that The other side of the flexible coil is provided with a mounting portion connected from one end to the other end thereof, a supporting member is arranged inside the mounting portion, and the clamping tube sleeve is arranged on the mounting portion of the flexible coil.

9. The pull-out and retractable hand-held rotating drum according to claim 8, It is characterized in that Both ends of the support member are respectively provided with detachable limit heads, and the top and bottom of the cylinder are respectively provided with limit blocks matched with the limit heads.

10. The pull-out and retractable hand-held rotating drum according to claim 1, It is characterized in that The hand-held component includes a handle shaft and a hand-held rod, a mounting slot is provided on the hand-held rod, and the hand-held rod is sleeved on the handle shaft through the mounting slot; it also includes a second return spring, which is sleeved on the handle shaft, and the hand-held rod is provided with a first limit mounting platform on the inner side of the upper part of the mounting slot, one end of the second return spring is against the first limit mounting platform, and a second limit mounting platform is provided at the lower part of the handle shaft, and the other end of the second return spring is against the second limit mounting platform, and a limit platform is provided at the bottom of the main shaft that is against the upper part of the hand-held rod, and a connecting head is provided at the lower part of the limit platform, and the main shaft is hinged to the upper part of the hand-held shaft through the connecting head.

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