Stroke amplification structure for cup cover, cup cover and tea making cup

Abstract

The utility model relates to the field of tea sets, in particular to a stroke amplification structure for a cup cover, the cup cover and a tea making cup. The free end of the traction rope penetrates through the threading hole and is used for being connected with a tea making piece; the traction rope penetrates through the stroke amplification mechanism, and a rope pulling structure is arranged in the stroke amplification mechanism; the driving mechanism is rotationally connected with the cup cover base, the driving mechanism drives the stroke amplification mechanism to operate when rotating, and the free end of the traction rope drives the tea making piece to move in the direction close to or away from the cup cover base under the action of the stroke amplification mechanism. The input stroke of the driving mechanism is smaller than the output stroke of the traction rope. The use convenience of the tea making cup is improved.

Description

Technical Field

[0001] The present application relates to the field of tea sets, and in particular to a travel amplification structure for a cup cover, a cup cover and a tea brewing cup. Background Art

[0002] The teacup is a container for tea. The water comes from the teapot and is poured into the teacup, and then the guests can taste the tea. When the tea brewing time is too long or too short, the taste of the tea will be reduced, so it is very important to control the tea brewing time reasonably.

[0003] A straw cup is disclosed in the related art, comprising: a cup body, the cup body having a hollow inner cavity; a cup cover, the cup cover is used to cover the end opening of the cup body; a straw, the straw extends into the inner cavity of the cup body, and at least a portion of the straw is connected to the cup cover; a tea bin, the tea bin comprises a first magnetic part, the cup cover comprises a second magnetic part that can be magnetically attracted to the first magnetic part, the relative position of the second magnetic part and the first magnetic part is movable, so that the tea bin is configured to be magnetically connected to or separated from the cup cover, and the tea bin is connected to the straw, so that the tea bin is configured to be movable along the longitudinal axis of the straw; wherein the tea bin is configured to be movable along the longitudinal axis of the straw in a direction away from the cup cover, or the tea bin is configured to be movable along the longitudinal axis of the straw in a direction close to the cup cover.

[0004] During their long-term work, the staff discovered the following defects: although the teacup in the relevant technology can reasonably control the tea brewing time, after the tea is brewed, the user first needs to manually turn the teacup upside down so that the tea compartment moves along the length of the straw to the position of the cup lid under the action of its own gravity. After the first magnetic component on the tea compartment is attracted by the second magnetic component on the cup lid, the user needs to invert the teacup again so that the cup lid is located on the top of the cup body to achieve tea and water separation. The whole process requires the cup body to be flipped over twice, which reduces the convenience of using the cup body. Utility Model Content

[0005] In order to improve the convenience of using a tea brewing cup, the present application provides a stroke amplification structure for a cup cover, a cup cover and a tea brewing cup.

[0006] The present application provides a travel amplification structure for a cup cover, a cup cover and a tea brewing cup using the following technical solutions:

[0007] A stroke amplification structure for a cup cover, comprising:

[0008] A cup cover base, wherein a through hole is provided on the cup cover base;

[0009] A traction rope, the free end of which passes through the through hole and is used to connect with the tea brewing unit;

[0010] A stroke amplification mechanism, through which the traction rope passes, and in which a pull rope structure is provided;

[0011] A driving mechanism is rotatably connected to the cup cover base. When rotating, the driving mechanism drives the pull rope structure of the stroke amplification mechanism to operate. When the pull rope structure is in operation, it drives the stroke amplification mechanism to operate. The free end of the pull rope drives the tea brewing component to move toward or away from the cup cover base under the action of the stroke amplification mechanism. The input stroke of the driving mechanism is smaller than the output stroke of the pull rope.

[0012] By adopting the above technical solution, after the tea is brewed, the stroke amplification mechanism is driven by the driving mechanism to operate, thereby causing the traction rope to bend and deform, and the free end of the traction rope drives the tea brewing component to move in a direction close to the cup cover base under the action of the stroke amplification mechanism, so that the tea brewing component moves from the tea to the position of the cup cover base, thereby realizing the separation of tea and water; when it is necessary to brew tea again, the stroke amplification mechanism is driven by the driving mechanism to operate, and the free end of the traction rope drives the tea brewing component to move in a direction away from the cup cover base under the action of the stroke amplification mechanism, so that the tea brewing component moves into the tea, thereby realizing brewing tea again; therefore, in the process of brewing tea, not only is it not necessary to invert the tea brewing cup, but also because the input stroke of the driving mechanism is smaller than the output stroke of the traction rope, the convenience of using the tea brewing cup is improved.

[0013] Optionally, the pull rope structure includes a pull rope, which is provided with an active end and a driven end, the driven end of the pull rope is connected to the traction rope, and the driving mechanism is used to drive the active end of the pull rope to move, and the traction rope is bent and deformed when the pull rope moves, so that the free end of the traction rope moves toward a direction close to the cup lid base.

[0014] By adopting the above technical solution, the driving mechanism drives the active end of the pull rope to move, and the active end of the pull rope drives the driven end of the pull rope to move during the movement. When the pull rope moves, it drives the traction rope to bend and deform, so that the free end of the traction rope moves toward the direction close to the cup cover base, thereby facilitating the tea brewing component to move toward or away from the cup cover base.

[0015] Optionally, a first connecting piece is provided at the driven end of the pull rope, the traction rope passes through the first connecting piece, and the traction rope is connected to the first connecting piece.

[0016] By adopting the above technical solution, the pull rope drives the first connecting member to move during the movement, and the first connecting member drives the traction rope to move during the movement, thereby facilitating the traction rope to bend and deform.

[0017] Optionally, the other end of the traction rope is fixed relative to the cup cover base or rotates following the driving mechanism, and the traction rope is movably connected to the pull rope.

[0018] By adopting the above technical solution, since the other end of the traction rope is fixed to the cup lid base or follows the driving mechanism to rotate, when the driving mechanism drives the active end of the pull rope to move, the driven end of the pull rope can easily drive the traction rope to move, causing the traction rope to bend and deform, thereby driving the free end of the traction rope to move in the direction close to the cup lid base.

[0019] Optionally, a guide mechanism is provided on the cup cover base, and the guide mechanism includes a guide groove, the pull rope is passed through the guide groove, the pull rope can move in the guide groove, and the traction rope can be pulled into the guide groove by the pull rope to achieve bending or folding of the traction rope.

[0020] By adopting the above technical solution, the guide groove limits the movement trajectory of the pull rope and the traction rope, and the guide groove can also ensure that the movement distance of the free end of the traction rope is greater than the movement distance of the driven end of the pull rope.

[0021] Optionally, the active end of the pull rope extends out of one end of the guide groove, and the driving mechanism is used to drive the active end of the pull rope to rotate along the circumferential edge of the cup cover base to achieve traction of the traction rope.

[0022] By adopting the above technical solution, the driving mechanism drives the active end of the pull rope to rotate when rotating, and the active end of the pull rope drives the driven end of the pull rope to move along the length direction of the guide groove when rotating, thereby realizing the traction effect on the traction rope and causing the traction rope to bend and deform.

[0023] Optionally, there are multiple stroke amplification mechanisms, and the driven end of the pull rope in each stroke amplification mechanism is movably connected to the traction rope, and the other end of the traction rope is fixed relative to the cup cover base or rotates following the driving mechanism. The driving mechanism is simultaneously connected to the active ends of multiple pull ropes to achieve stroke amplification and traction of the traction rope.

[0024] By adopting the above technical solution, since the other end of the traction rope is fixed relative to the cup lid base or rotates following the driving mechanism, the driving mechanism simultaneously drives the active ends of multiple pull ropes to move, and each pull rope drives the driven end to move during the movement, so that multiple pull ropes simultaneously pull the traction ropes, so that the pull ropes are bent and deformed at multiple positions at the same time, thereby reducing the input stroke of the driving mechanism.

[0025] Optionally, a plurality of guide mechanisms are provided on the cup lid base, each of the guide mechanisms comprises a guide groove; each of the pull ropes is correspondingly passed through the guide groove, and the active end of each pull rope extends out of one end of the guide groove; the driving mechanism is connected to the free ends of the plurality of pull ropes and is used to simultaneously drive the free ends of the plurality of pull ropes to rotate along the circumferential edge of the cup lid base to achieve traction of the traction rope.

[0026] By adopting the above technical solution, since each pull rope is inserted into the guide groove, the active end of each pull rope extends out of one end of the guide groove, and the driving mechanism is used to simultaneously drive the active end of the pull rope to rotate along the circumferential edge of the cup cover base to achieve traction of the traction rope, and the movement distance of the driven end of each pull rope is the same as the movement distance of the active end of the pull rope, so that the traction rope is bent and deformed in multiple guide grooves at the same time. The setting of multiple guide grooves makes the movement distance of the free end of the traction rope greater than the sum of the movement distances of the driven ends of multiple pull ropes, thereby further reducing the rotational displacement of the driving mechanism.

[0027] Optionally, the driving mechanism includes a top cover, the top cover is rotatably connected to the cup cover base, the active end of the pull rope is connected to the top cover, and the driving mechanism is controlled in a rotational manner.

[0028] By adopting the above technical solution, the top cover is driven to rotate by pushing, pulling or rotating, thereby increasing the convenience of brewing tea.

[0029] Optionally, the driving mechanism further comprises a driving rod, wherein the driving rod is disposed on the top cover, and an active end of a pull rope in the stroke amplification mechanism is connected to the driving rod.

[0030] By adopting the above technical solution, the top cover drives the driving rod to rotate during the rotation process, and the driving rod drives the active end of the pull rope to rotate along the circumferential edge of the cup cover base during the rotation process.

[0031] Optionally, a second connecting member is provided at the active end of the pull rope, and the second connecting member is rotatably connected to the driving rod.

[0032] By adopting the above technical solution, since the second connecting member is rotatably connected to the driving rod, when the top cover drives the driving rod to rotate, the direction of the active end of the pull rope can be ensured to remain unchanged, thereby reducing the deformation degree of the active end of the pull rope, which is beneficial to the active end of the pull rope and prolongs the service life of the pull rope.

[0033] Optionally, the driving mechanism further includes a driving block, which may be disposed on the top of the top cover or the side wall of the top cover; the top cover is rotated by applying an external force from the top or side of the top cover, thereby driving the stroke amplification mechanism to operate.

[0034] By adopting the above technical solution, the driving block is rotated by applying external force from the top or side of the top cover, and the driving block drives the top cover to select, thereby driving the stroke amplification mechanism to operate, so that the free end of the traction belt moves toward or away from the cup cover base, thereby increasing the convenience of the user in making tea.

[0035] A cup cover comprises the above-mentioned stroke amplification structure for the cup cover, and also comprises a top cover and a positioning mechanism. When an external force is applied to the driving mechanism to make it rotate and drive the traction rope to move to a certain position toward the base of the cup cover, the positioning mechanism positions the driving mechanism to prevent the positioning mechanism from moving in the opposite direction when the external force is lost.

[0036] By adopting the above technical solution, since Dangdang applies external force to the driving mechanism to make it rotate and drive the traction rope to move to a certain position toward the base of the cup cover, the positioning mechanism positions the driving mechanism to prevent the positioning mechanism from moving in the opposite direction when the external force is lost. Therefore, the user can move the tea brewing piece to the required position through the stroke amplification mechanism as needed during the tea brewing process, thereby reducing the movements during the tea brewing process and increasing the convenience of tea brewing.

[0037] Optionally, the positioning mechanism is positioned by magnetic attraction, sleeve connection or snap connection.

[0038] By adopting the above technical solution, magnetic positioning is easy to use and does not require complicated operation procedures. You only need to place it on the object to be positioned, and it will be automatically adsorbed without moving or shaking, which is more stable; positioning by socketing or snapping is convenient and fast with various styles.

[0039] Optionally, the positioning mechanism includes a first magnetic positioning member and a second magnetic positioning member, the first magnetic positioning member is arranged on the cup cover base, the second magnetic positioning member is arranged on the top cover, and the first magnetic positioning member is magnetically connected to the second magnetic positioning member.

[0040] By adopting the above technical solution, when the traction rope drives the tea brewing piece to move during the bending and deformation, the first magnetic positioning piece on the active piece has a magnetic attraction effect on the second magnetic positioning piece on the top cover, preventing the traction rope from falling freely without external force. Therefore, the user can move the tea brewing piece to the required position through the stroke amplification mechanism as needed during the tea brewing process, thereby reducing the movement during the tea brewing process and increasing the convenience of tea brewing.

[0041] Optionally, a reset mechanism is provided on the top cover, and the reset mechanism is used to drive the stroke amplification mechanism and / or the driving mechanism to reset.

[0042] By adopting the above technical solution, after the stroke amplification mechanism or the driving mechanism is running, the reset mechanism can reset the stroke amplification mechanism or the driving mechanism.

[0043] Optionally, the reset mechanism includes a reset spring, one end of the reset spring abuts against the top cover or the cup cover base, and the other end of the reset spring abuts against the stroke amplification mechanism and / or the driving mechanism. When the stroke amplification mechanism and / or the driving mechanism drive the traction belt to be retracted, the stroke amplification mechanism and / or the driving mechanism squeeze the reset spring. The reset spring stores elastic potential energy, and when the reset spring releases the elastic force, the stroke amplification mechanism and / or the driving mechanism returns to an initial position.

[0044] By adopting the above technical solution, since one end of the return spring abuts against the top cover or the cup cover base, and the other end of the return spring abuts against the stroke amplification mechanism and / or the driving mechanism, the stroke amplification mechanism or the driving mechanism squeezes the return spring during operation, so that the return spring stores elastic potential energy. When the return spring releases the elastic force, the stroke amplification mechanism and / or the driving mechanism returns to the initial position, thereby increasing the convenience of the user in making tea.

[0045] A tea brewing cup comprises the above-mentioned cup cover, a cup body and a tea brewing piece, wherein the cup cover is detachably connected to the cup body, and the free end of the traction rope is used to connect the tea brewing piece.

[0046] By adopting the above technical solution, since the tea brewing component is located in the cup body, when the cup body is filled with a proper amount of boiling water, the travel amplification structure for the cup cover in the cup cover can not only move the tea brewing component in the cup body to the cup cover position, but also move the tea brewing component from the cup cover position into the cup body, so that there is no need to invert the cup body during the tea brewing process, thereby improving the convenience of using the teacup.

[0047] Optionally, a first magnetic component is provided at the free end of the traction rope, and a second magnetic component is fixedly provided on the tea brewing component, and the first magnetic component and the second magnetic component are connected by magnetic attraction, sleeve connection or clamping.

[0048] By adopting the above technical solution, the first magnetic component and the second magnetic component are connected by magnetic attraction, sleeve connection or clamping, which not only can fix the tea brewing component to the free end of the traction rope, but also increases the convenience of users in installing and disassembling the tea brewing component.

[0049] Optionally, a sealed channel is fixedly provided on the cup cover base, and the sealed channel is located at one side of the cup cover base; one end of the sealed channel is interconnected with the through hole, and the other end of the sealed channel is closed; the first magnetic attraction piece is movably provided in the sealed channel, and the tea brewing piece is movably provided outside the sealed channel;

[0050] The magnetic attraction force of the first magnetic component on the second magnetic component is used to adsorb the tea brewing component to the outer wall of the sealed channel, the friction force between the first magnetic component and the sealed channel is defined as a first friction force, and the friction force between the tea brewing component and the sealed channel is defined as a second friction force, and the gravity acting on the tea brewing component is greater than the sum of the first friction force and the second friction force.

[0051] By adopting the above technical scheme, since one end of the sealed channel is interconnected with the through-hole, the first magnetic component is first fixed to one end of the traction rope, and then the first magnetic component is passed through the through-hole, and the first magnetic component falls inside the sealed channel under the action of its own gravity, and at the same time, the part of the traction rope passing through the through-hole is also located inside the sealed channel; since the magnetic attraction of the first magnetic component to the second magnetic component is used to adsorb the tea brewing component to the outer wall of the sealed channel, when the stroke amplification mechanism drives the traction rope to bend and deform to drive the first magnetic component to move toward the direction close to the base of the cup cover, the magnetic attraction of the first magnetic component to the second magnetic component is used to drive the tea brewing component to move toward the direction close to the base of the cup cover; since the gravity exerted on the tea brewing component is greater than the sum of the first friction force and the second friction force, when the stroke amplification mechanism is released from the winding effect of the traction rope, the tea bin falls into the cup body under the action of its own gravity to achieve tea brewing.

[0052] Optionally, there are multiple second magnetic components, and the multiple second magnetic components are arranged along the circumference of the tea brewing component.

[0053] By adopting the above technical solution, since the plurality of second magnetic elements are arranged along the circumference of the tea brewing element, no matter which side of the tea brewing element faces the sealing channel, the first magnetic element can adsorb the tea brewing element to the outer wall of the sealing channel.

[0054] Optionally, the second magnetic attraction member is an annular magnet, and the first magnetic attraction member has a magnetic attraction force on the outer side wall of the annular magnet.

[0055] By adopting the above technical solution, since the second magnetic member is a ring magnet, the first magnetic member has a magnetic attraction to the outer wall of the ring magnet. Therefore, no matter which side of the tea brewing member faces the sealed channel, the first magnetic member can adsorb the tea brewing member to the outer wall of the sealed channel.

[0056] By adopting the above technical solution, since the first magnetic component is movably arranged in the sealed channel, the sealed channel has a barrier effect on tea, thereby ensuring that the traction rope and the first magnetic component will not be soaked by the tea; at the same time, since the tea brewing component is movably arranged outside the sealed channel, it is convenient to brew tea, and at the same time, the magnetic attraction force between the first magnetic component and the second magnetic component facilitates the movement of the tea brewing component in the cup body.

[0057] In summary, the present application includes at least one of the following beneficial technical effects:

[0058] 1. When the tea is brewed, the stroke amplification mechanism is driven by the driving mechanism to operate, thereby driving the traction rope to bend and deform, and the free end of the traction rope drives the tea brewing component to move in the direction close to the cup cover base under the action of the stroke amplification mechanism, so that the tea brewing component moves from the tea to the position of the cup cover base, thereby realizing the separation of tea and water; when it is necessary to brew tea again, the stroke amplification mechanism is driven by the driving mechanism to operate, and the free end of the traction rope drives the tea brewing component to move in the direction away from the cup cover base under the action of the stroke amplification mechanism, so that the tea brewing component moves into the tea, thereby realizing brewing tea again; therefore, in the process of brewing tea, not only does it not need to invert the tea brewing cup, but also because the input stroke of the driving mechanism is smaller than the output stroke of the traction rope, the convenience of using the tea brewing cup is improved;

[0059] 2. When the traction rope is bent and deformed, the positioning mechanism is used to prevent the traction rope from falling freely without external force. Therefore, the user can move the tea brewing part to the required position through the stroke amplification mechanism as needed during the tea brewing process, thereby reducing the movement during the tea brewing process and increasing the convenience of tea brewing;

[0060] 3. Since the tea brewing component is located in the cup body, when the cup body is filled with a proper amount of boiling water, the travel amplification structure for the cup cover in the cup cover can not only move the tea brewing component in the cup body to the cup cover position, but also move the tea brewing component from the cup cover position into the cup body, so that there is no need to invert the cup body during the tea brewing process, which improves the convenience of using the teacup. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a structural schematic diagram of the stroke amplification structure for the cup cover, the cup cover and the tea brewing cup in Example 1 of the present application.

[0062] Figure 2 It is a structural schematic diagram of the cup cover base, traction rope, stroke amplification mechanism, guide mechanism and positioning mechanism in Example 1 of the present application.

[0063] Figure 3 It is a structural schematic diagram of the driving mechanism in Example 1 of the present application.

[0064] Figure 4 It is a half-section view of the stroke amplification structure for the cup cover, the cup cover and the tea brewing cup in Example 1 of the present application.

[0065] Figure 5 It is a structural schematic diagram of the cup cover base, traction rope, stroke amplification mechanism, guide mechanism and positioning mechanism in Example 2 of the present application.

[0066] Figure 6 It is a structural schematic diagram of the driving mechanism in Example 2 of the present application.

[0067] Figure 7 It is a structural schematic diagram of the stroke amplification structure for the cup cover, the cup cover and the tea brewing cup in Example 3 of the present application.

[0068] Figure 8 It is a structural schematic diagram of the stroke amplification structure for the cup cover, the cup cover and the tea brewing cup in Example 4 of the present application.

[0069] Fig. 9 It is a structural schematic diagram of the cup cover base, traction rope, reset mechanism, stroke amplification mechanism, guide mechanism and cup body in Example 5 of the present application.

[0070] Fig.10 It is a schematic diagram of the structure of the top cover and the stopper in Example 2 of the present application.

[0071] Description of reference numerals:

[0072] 1. Cup cover base; 11. Through hole; 12. Sealing channel; 13. Fixing rod; 14. First mounting groove; 2. Traction rope; 21. First magnetic member; 22. Ring member; 3. Tea brewing member; 31. Second magnetic member; 4. Reset mechanism; 41. Reset spring; 42. Stop block; 43. Arc block; 44. Arc groove; 5. Stroke amplification mechanism; 51. Pull rope; 52. First connecting member; 53. Second connecting member; 6. Driving mechanism; 61. Top cover; 62. Driving rod; 63. Driving block; 64. Positioning column; 65. Second mounting groove; 7. Guide mechanism; 71. Guide groove; 72. Guide block; 8. Positioning mechanism; 81. First magnetic positioning member; 82. Second magnetic positioning member; 9. Cup body. DETAILED DESCRIPTION

[0073] The following is combined with Figure 1-10 This application is described in further detail.

[0074] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be the common meanings understood by those skilled in the art to which this application belongs. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0075] Example 1

[0076] The present application embodiment discloses a travel amplification structure for a cup cover, a cup cover and a tea brewing cup. Figure 1 and Figure 2 The stroke amplification structure for the cup cover includes: a cup cover base 1, a traction rope 2, a stroke amplification mechanism 5 and a driving mechanism 6.

[0077] Reference Figure 2 and Figure 3 The upper surface of the cup cover base 1 is provided with a through hole 11, and the free end of the traction rope 2 passes through the through hole 11 and is used to connect with the tea brewing member 3 (refer to Figure 4 ), the other end of the traction rope 2 is fixed relative to the cup cover base 1 or rotates with the driving mechanism 6. In this embodiment, the specific tea brewing part 3 can be a tea warehouse or a tea bag or other utensils for holding tea leaves. A fixed rod 13 is fixedly provided on the cup cover base 1, and a ring-shaped part 22 is fixedly provided on the other end of the traction rope 2. The ring-shaped part 22 is sleeved on the fixed rod 13, and the ring-shaped part 22 is fixedly connected or rotationally connected to the fixed rod 13. The traction rope 2 passes through the stroke amplification mechanism 5, and the stroke amplification mechanism 5 causes the traction rope 2 to bend and deform during operation. The free end of the traction rope 2 drives the tea brewing part 3 to move toward or away from the cup cover base 1 under the action of the stroke amplification mechanism 5. The driving mechanism 6 is rotationally connected to the cup cover base 1. When the driving mechanism 6 rotates, the pull rope structure of the stroke amplification mechanism 5 is driven to operate. When the pull rope structure drives the stroke amplification mechanism 5 to operate, the pull rope structure drives the stroke amplification mechanism 5 to operate, thereby driving the traction rope 2 to bend and deform. The free end of the traction rope 2 drives the tea brewing part 3 to move toward the direction close to the cup cover base 1, and the input stroke of the driving mechanism 6 is smaller than the output stroke of the traction rope 2. In this embodiment, the input stroke of the driving mechanism 6 refers to the circumferential movement distance of the driving mechanism 6 , and the output stroke of the traction rope 2 refers to the movement distance of the free end of the traction rope 2 .

[0078] A pull rope structure is provided in the stroke amplification mechanism 5, and the pull rope structure drives the stroke amplification mechanism 5 to operate during operation. In this embodiment, the pull rope structure includes a pull rope 51, and the pull rope 51 is provided with an active end and a driven end. The driven end of the pull rope 51 is connected to the traction rope 2, and the driving mechanism 6 is used to drive the active end of the pull rope 51 to move. When the pull rope 51 moves, the traction rope 2 is bent and deformed, so that the free end of the traction rope 2 moves toward or away from the cup cover base 1. The driving mechanism 6 drives the active end of the pull rope 51 to move, and the active end of the pull rope 51 drives the driven end of the pull rope 51 to move during the movement. When the pull rope 51 moves, the traction rope 2 is bent and deformed, so that the free end of the traction rope 2 moves toward or away from the cup cover base 1, thereby facilitating the tea brewing component 3 to move toward or away from the cup cover base 1.

[0079] Reference Figure 2 Specifically, the driven end of the pull rope 51 is provided with a first connecting member 52, which is ring-shaped or hook-shaped, and the traction rope 2 passes through the first connecting member 52, and the traction rope 2 is movably connected to the first connecting member 52. The pull rope 51 drives the first connecting member 52 to move during the movement, and the first connecting member 52 drives the traction rope 2 to move during the movement, so as to facilitate the traction rope 2 to bend and deform.

[0080] A guide mechanism 7 is provided on the cup cover base 1. In this embodiment, the guide mechanism 7 includes a guide groove 71 and two guide blocks 72. The guide groove 71 is located between the two guide blocks 72. The pull rope 51 is passed through the guide groove 71. The pull rope 51 can move in the guide groove 71. The traction rope 2 can be pulled into the guide groove 71 by the pull rope 51 to achieve bending or folding of the traction rope 2. The guide groove 71 defines the movement trajectory of the pull rope 51 and the traction rope 2. At the same time, the guide groove 71 can also ensure that the movement distance of the free end of the traction rope 2 is greater than the movement distance of the driven end of the pull rope 51.

[0081] Reference Figure 2 and Figure 3 Furthermore, the active end of the pull rope 51 extends out of one end of the guide groove 71, and the driving mechanism 6 is used to drive the active end of the pull rope 51 to rotate along the circumferential edge of the cup cover base 1 to achieve traction of the traction rope 2, causing the traction rope 2 to bend and deform.

[0082] Reference Figure 3 The driving mechanism 6 includes a top cover 61, which is rotatably connected to the cup cover base 1. The control method of the driving mechanism 6 is rotation, which increases the convenience of brewing tea.

[0083] The driving mechanism 6 also includes a driving rod 62, which is arranged on one side of the top cover 61 close to the cup cover base 1, and the active end of the pull rope 51 in the stroke amplification mechanism 5 is connected to the driving rod 62. The top cover 61 drives the driving rod 62 to rotate during the rotation process, and the driving rod 62 drives the active end of the pull rope 51 to rotate along the circumferential edge of the cup cover base 1 during the rotation process, thereby driving the traction rope 2 to bend and deform. Further, the input stroke of the driving mechanism 6 refers to the circumferential movement distance of the driving rod 62.

[0084] Reference Figure 2 and Figure 3 The active end of the pull rope 51 is fixedly provided with a second connecting member 53, the first connecting member 52 is ring-shaped or hook-shaped, the driving rod 62 passes through the second connecting member 53, and the second connecting member 53 is rotatably connected to the driving rod 62. Since the second connecting member 53 is rotatably connected to the driving rod 62, when the top cover 61 drives the driving rod 62 to rotate, the direction of the active end of the pull rope 51 can be ensured to remain unchanged, thereby reducing the deformation degree of the active end of the pull rope 51, protecting the active end of the pull rope 51, and extending the service life of the pull rope 51.

[0085] Continue to refer to Figure 2 and Figure 3The present application also discloses a cup cover, including the above-mentioned stroke amplification structure for the cup cover, and also including a positioning mechanism 8. When the traction rope 2 is bent and deformed, the positioning mechanism 8 is used to prevent the traction rope 2 from falling freely without being subjected to external force. Since when the traction rope 2 is bent and deformed, the positioning mechanism 8 is used to prevent the traction rope 2 from falling freely without being subjected to external force, the user can move the tea brewing part 3 to a desired position through the stroke amplification mechanism 5 as needed during the tea brewing process, thereby reducing the movements during the tea brewing process and increasing the convenience of tea brewing.

[0086] The positioning mechanism 8 is positioned by magnetic attraction, sleeve connection or snap connection. Magnetic attraction positioning is easy to use and does not require complicated operation procedures. It only needs to be placed on the object to be positioned, and it will be automatically adsorbed without movement or shaking, which is more stable; positioning by sleeve connection or snap connection has the advantages of convenience, speed and variety of styles.

[0087] In this embodiment, the positioning mechanism 8 includes a first magnetic positioning member 81 and a second magnetic positioning member 82. A first mounting groove 14 is provided on the upper surface of the cup cover base 1. The first magnetic positioning member 81 is fixed in the first mounting groove 14, and the surface of the first magnetic positioning member 81 is flush with the surface of the cup cover base 1. A positioning column 64 is fixedly provided on the inner side wall of the top cover 61. A second mounting groove 65 is provided at one end of the positioning column 64 close to the cup cover base 1. The second magnetic positioning member 82 is fixed in the second mounting groove 65. There is a magnetic attraction between the first magnetic positioning member 81 and the second magnetic positioning member 82. In this embodiment, at least one of the first magnetic positioning member 81 and the second magnetic positioning member 82 is a magnet, and the other can be a magnet or iron, cobalt, nickel and alloys thereof. When the traction rope 2 drives the tea brewing component 3 to move during the bending deformation, the first magnetic positioning component 81 on the active component has a magnetic attraction effect on the second magnetic positioning component 82 on the top cover 61, preventing the traction rope 2 from falling freely without external force. Therefore, the user can move the tea brewing component 3 to the required position through the stroke amplification mechanism 5 as needed during the tea brewing process, thereby reducing the movements during the tea brewing process and increasing the convenience of tea brewing.

[0088] Reference Figure 4 The present application also discloses a tea brewing cup, comprising the above-mentioned cup cover, a cup body 9 and a tea brewing member 3, wherein the cup cover is detachably connected to the cup body 9, and the free end of the traction rope 2 is used to connect the tea brewing member 3. Since the tea brewing member 3 is located in the cup body 9, when the cup body 9 is filled with a proper amount of boiling water, the travel amplification mechanism 5 for the cup cover in the cup cover can not only move the tea brewing member 3 in the cup body 9 to the cup cover position, but also move the tea brewing member 3 from the cup cover position to the cup body 9, so that the cup body 9 does not need to be inverted during the tea brewing process, thereby improving the convenience of using the tea cup.

[0089] The free end of the traction rope 2 is provided with a first magnetic component 21, and the tea brewing component 3 is fixedly provided with a second magnetic component 31. The first magnetic component 21 and the second magnetic component 31 are connected by magnetic attraction, sleeve connection or clamping. In this embodiment, at least one of the first magnetic component 21 and the second magnetic component 31 is a magnet, and the other can be a magnet or iron, cobalt, nickel and alloys thereof. The magnetic attraction between the first magnetic component 21 and the second magnetic component 31 can not only fix the tea brewing component 3 to the free end of the traction rope 2, but also increase the convenience for the user to install and remove the tea brewing component 3.

[0090] A sealed channel 12 is fixedly provided on the side of the cup cover base 1 facing away from the top cover 61. The end of the sealed channel 12 close to the cup cover base 1 is interconnected with the through hole 11, and the end of the sealed channel 12 away from the cup cover base 1 is closed. The first magnetic component 21 is movably arranged in the sealed channel 12, and the tea brewing component 3 is movably arranged outside the sealed channel 12. Since the first magnetic component 21 is movably arranged in the sealed channel 12, the sealed channel 12 has a barrier effect on the tea, thereby ensuring that the traction rope 2 and the first magnetic component 21 will not be soaked by the tea. Since the magnetic attraction of the first magnetic component 21 to the second magnetic component 31 is used to adsorb the tea brewing component 3 to the outer wall of the sealed channel 12, the friction between the first magnetic component 21 and the sealed channel 12 is defined as the first friction, and the friction between the tea brewing component 3 and the sealed channel 12 is defined as the second friction, and the gravity on the tea brewing component 3 is greater than the sum of the first friction and the second friction. When the stroke amplification mechanism 5 drives the traction rope 2 to bend and deform, and drives the first magnetic component 21 to move toward the direction close to the cup cover base 1, the magnetic attraction of the first magnetic component 21 to the second magnetic component 31 is used to drive the tea brewing component 3 to move toward the direction close to the cup cover base 1. Since the gravity exerted on the tea brewing component 3 is greater than the sum of the first friction force and the second friction force, when the stroke amplification mechanism is released from the winding action of the traction rope 2, the tea brewing component 3 falls into the cup body 9 under the action of its own gravity to achieve tea brewing.

[0091] In this embodiment, there are multiple second magnetic members 31, and the multiple second magnetic members 31 are arranged along the circumference of the tea brewing member 3. In order to increase the overall aesthetics, the multiple second magnetic members 31 can be arranged at equal intervals. Since the multiple second magnetic members 31 are arranged along the circumference of the tea brewing member 3, no matter which side of the tea brewing member 3 faces the sealing channel 12, the first magnetic member 21 can adsorb the tea brewing member 3 to the outer wall of the sealing channel 12.

[0092] Of course, the second magnetic member 31 in this embodiment can also be a ring magnet, and the first magnetic member 21 has a magnetic attraction to the arc-shaped outer wall of the ring magnet. Since the second magnetic member 31 is a ring magnet, the first magnetic member 21 has a magnetic attraction to the outer wall of the ring magnet. Therefore, no matter which side of the tea brewing member 3 faces the sealed channel 12, the first magnetic member 21 can adsorb the tea brewing member 3 to the outer wall of the sealed channel 12.

[0093] Example 2

[0094] Reference Figure 5 and Figure 6 In this embodiment, there are multiple stroke amplification mechanisms 5, and the driven end of the pull rope 51 in each stroke amplification mechanism 5 is movably connected to the traction rope 2, and the other end of the traction rope 2 is fixed relative to the cup cover base 1 or moves in the same direction as the free end of the traction rope 2. The driving mechanism 6 is simultaneously connected to the active ends of multiple pull ropes 51 to achieve stroke amplification and traction of the traction rope 2. Since the other end of the traction rope 2 is fixed relative to the cup cover base 1 or rotates with the driving mechanism 6, the active ends of multiple pull ropes 51 are simultaneously driven to move by the driving mechanism 6, and each pull rope 51 drives the driven end to move during the movement, so that multiple pull ropes 51 simultaneously pull the movement of the traction rope 2, so that multiple positions of the pull rope 51 are bent and deformed at the same time, thereby reducing the input stroke of the driving mechanism 6.

[0095] Correspondingly, there are multiple driving rods 62 on the top cover 61, and the number of driving rods 62 is greater than the number of stroke amplification mechanisms 5. The annular member 22 of each traction rope 2 is sleeved on the driving rod 62, and the annular member 22 is fixedly connected or rotatably connected to the fixed rod 13.

[0096] Correspondingly, a plurality of guide mechanisms 7 are provided on the cup cover base 1, and the number of the guide mechanisms 7 is greater than the number of the stroke amplification mechanisms 5. Each guide mechanism 7 includes a guide slot 71, each pull rope 51 is correspondingly passed through the guide slot 71, and the active end of each pull rope 51 extends out of one end of the guide slot 71. The driving mechanism 6 is connected to the free ends of the plurality of pull ropes 51 and is used to simultaneously drive the free ends of the plurality of pull ropes 51 to rotate along the circumferential edge of the cup cover base 1 to achieve traction of the traction rope 2. Since each pull rope 51 is correspondingly inserted into the guide groove 71, the active end of each pull rope 51 extends out of one end of the guide groove 71, and the driving mechanism 6 is used to simultaneously drive the active end of the pull rope 51 to rotate along the circumferential edge of the cup cover base 1 to achieve traction of the traction rope 2. The movement distance of the driven end of each pull rope 51 is the same as the movement distance of the active end of the pull rope 51, so that the traction rope 2 is bent and deformed in multiple guide grooves 71 at the same time. The setting of multiple guide grooves 71 makes the movement distance of the free end of the traction rope 2 greater than the movement distance of the driven ends of multiple pull ropes 51, thereby further reducing the rotational displacement of the driving mechanism 6.

[0097] Example 3

[0098] Reference Figure 7The difference between this embodiment and the first embodiment is that the driving mechanism 6 further includes a driving block 63, which can be disposed on the top of the top cover 61. The top cover 61 is rotated by applying an external force from the top of the top cover 61, thereby driving the stroke amplification mechanism 5 to operate, so that the free end of the traction belt moves toward or away from the cup cover base 1. The stroke amplification mechanism 5 is driven to operate by rotating the driving block 63, so that the free end of the traction belt moves toward or away from the cup cover base 1, thereby increasing the convenience of the user in making tea.

[0099] Example 4

[0100] Reference Figure 8 The difference between this embodiment and the third embodiment is that the driving block 63 is arranged on the side wall of the top cover 61, and the top cover 61 is rotated by applying an external force from the side of the top cover 61, thereby driving the stroke amplification mechanism 5 to operate, so that the free end of the traction belt moves toward or away from the cup cover base 1. The stroke amplification mechanism 5 is driven to operate by rotating the driving block 63, so that the free end of the traction belt moves toward or away from the cup cover base 1, which increases the convenience of the user in making tea.

[0101] Example 5

[0102] Reference Fig. 9 and Fig.10 The difference between this embodiment and embodiment 2 is that it also includes a reset mechanism 4, which is used to drive the stroke amplification mechanism 5 and / or the driving mechanism 6 to reset (combined with Figure 3 ). After the stroke amplification mechanism 5 or the driving mechanism 6 is running, the reset mechanism 4 can reset the stroke amplification mechanism 5 or the driving mechanism 6.

[0103] In this embodiment, the reset mechanism 4 includes a reset spring 41, one end of the reset spring 41 abuts against the top cover 61 or the cup cover base 1, and the other end of the reset spring 41 abuts against the stroke amplification mechanism 5 and / or the driving mechanism 6. When the stroke amplification mechanism 5 and / or the driving mechanism 6 drive the traction belt to be reeled, the stroke amplification mechanism 5 and / or the driving mechanism 6 squeeze the reset spring 41, and the reset spring 41 stores elastic potential energy. When the reset spring 41 releases the elastic force, the stroke amplification mechanism 5 and / or the driving mechanism 6 returns to its initial position.

[0104] Specifically, the reset mechanism 4 further includes a stopper 42 and an arc block 43. The arc block 43 is fixed to the side of the cup cover base 1 facing the top cover 61. The arc block 43 is also provided with an arc groove 44 on the side close to the top cover 61. Both ends of the arc groove 44 are closed. The reset spring 41 is located in the arc groove 44. One end of the reset spring 41 is fixedly connected to the inner side wall of one end of the arc block 43. A stopper 42 is fixedly provided on one side of the top cover 61 close to the cup cover base 1. When the tea is brewed and the tea brewing component 3 needs to be separated from the tea, the top cover 61 is rotated. When the top cover 61 rotates relative to the cup cover base 1, the top cover 61 first drives the stopper 42 to move in the arc groove 44 toward the direction close to the reset spring 41. The stopper 42 and one end of the arc block 43 squeeze the reset spring 41, so that the reset spring 41 is in a compressed state. At the same time, the top cover 61 drives the second magnetic positioning member 82 to rotate. When the second magnetic positioning member 82 rotates to the position of the first magnetic positioning member 81, The first magnetic positioning member 81 has a magnetic attraction effect on the second magnetic positioning member 82, thereby fixing the top cover 61 on the cup cover base 1; when it is necessary to continue brewing tea, by rotating the top cover 61 in a direction away from the reset spring 41, the top cover 61 simultaneously drives the second magnetic positioning member 82 and the stopper 42 to rotate. When the second magnetic positioning member 82 is separated from the first magnetic positioning member 81, the top cover 61 is reset under the elastic force of the reset spring 41, thereby realizing the unwinding effect of the traction rope 2. At this time, the tea brewing member 3 falls back to the bottom of the cup body 9 under the action of its own gravity to achieve tea brewing.

[0105] The implementation principle of the present application is: when the tea is brewed, the stroke amplification mechanism 5 is driven to operate by the driving mechanism 6, thereby driving the traction rope 2 to bend and deform, and the free end of the traction rope 2 drives the tea brewing component 3 to move in the direction close to the cup cover base 1 under the action of the stroke amplification mechanism 5, so that the tea brewing component 3 moves from the tea to the position of the cup cover base 1, thereby realizing the separation of tea and water; when it is necessary to brew tea again, the stroke amplification mechanism 5 is driven to operate by the driving mechanism 6, and the free end of the traction rope 2 drives the tea brewing component 3 to move in the direction away from the cup cover base 1 under the action of the stroke amplification mechanism 5, so that the tea brewing component 3 moves into the tea, and brewing tea again is realized; therefore, in the process of brewing tea, not only is it not necessary to invert the tea brewing cup, but also, because the input stroke of the driving mechanism 6 is smaller than the output stroke of the traction rope 2, the convenience of using the tea brewing cup is improved.

[0106] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stroke amplification structure for a cup cover, characterized in that: include: A cup cover base (1), wherein a through hole (11) is provided on the cup cover base (1); A traction rope (2), the free end of which passes through the insertion hole (11) and is used to connect with the tea brewing unit (3); A stroke amplification mechanism (5), the traction rope (2) passes through the stroke amplification mechanism (5), and a pull rope structure is provided in the stroke amplification mechanism (5); A driving mechanism (6), wherein the driving mechanism (6) is rotatably connected to the cup cover base (1), and when the driving mechanism (6) rotates, the stroke amplification mechanism (5) is driven to operate, and the free end of the traction rope (2) drives the tea brewing component (3) to move toward or away from the cup cover base (1) under the action of the stroke amplification mechanism (5), and the input stroke of the driving mechanism (6) is smaller than the output stroke of the traction rope (2).

2. The stroke amplification structure for a cup cover according to claim 1, characterized in that: The pull rope structure comprises a pull rope (51), wherein the pull rope (51) is provided with an active end and a passive end, wherein the passive end of the pull rope (51) is connected to the traction rope (2), and the driving mechanism (6) is used to drive the active end of the pull rope (51) to move, and when the pull rope (51) moves, the traction rope (2) is driven to bend and deform, so that the free end of the traction rope (2) moves in a direction close to the cup cover base (1).

3. The stroke amplification structure for a cup cover according to claim 2, characterized in that: The driven end of the pull rope (51) is provided with a first connecting piece (52), the traction rope (2) passes through the first connecting piece (52), and the traction rope (2) is connected to the first connecting piece (52).

4. The stroke amplification structure for a cup cover according to claim 2, characterized in that: The other end of the traction rope (2) is fixed relative to the cup cover base (1) or rotates following the driving mechanism (6), and the traction rope (2) is movably connected to the pull rope (51).

5. The stroke amplification structure for a cup cover according to claim 2, characterized in that: The cup cover base (1) is provided with a guide mechanism (7), the guide mechanism (7) comprising a guide groove (71), the pull rope (51) is passed through the guide groove (71), the pull rope (51) can move in the guide groove (71), and the traction rope (2) can be pulled by the pull rope (51) into the guide groove (71) to achieve bending or folding of the traction rope (2).

6. The stroke amplification structure for a cup cover according to claim 5, characterized in that: The active end of the pull rope (51) extends out of one end of the guide groove (71), and the driving mechanism (6) is used to drive the active end of the pull rope (51) to rotate along the circumferential edge of the cup cover base (1) to achieve traction of the traction rope (2).

7. A stroke amplification structure for a cup cover according to any one of claims 1 to 6, characterized in that: The number of the stroke amplification mechanisms (5) is multiple, and the driven end of the pull rope (51) of each of the stroke amplification mechanisms (5) is movably connected to the traction rope (2), and the other end of the traction rope (2) is fixed relative to the cup cover base (1) or follows the driving mechanism (6) to make rotational movement, and the driving mechanism (6) is simultaneously connected to the active ends of multiple pull ropes (51) to achieve stroke amplification and traction of the traction rope (2).

8. The stroke amplification structure for a cup cover according to claim 7, characterized in that: A plurality of guide mechanisms (7) are arranged on the cup cover base (1), and each of the guide mechanisms (7) comprises a guide groove (71); each of the pull ropes (51) is correspondingly inserted into one of the guide grooves (71), and the active end of each of the pull ropes (51) extends out of one end of the guide groove (71); the driving mechanism (6) is connected to the free ends of the plurality of pull ropes (51) and is used to simultaneously drive the free ends of the plurality of pull ropes (51) to rotate along the circumferential edge of the cup cover base (1) to achieve traction of the traction rope (2).

9. A stroke amplification structure for a cup cover according to any one of claims 2 to 6, characterized in that: The driving mechanism (6) comprises a top cover (61), the top cover (61) is rotatably connected to the cup cover base (1), the active end of the pull rope is connected to the top cover, and the control mode of the driving mechanism (6) is rotation.

10. The stroke amplification structure for a cup cover according to claim 9, characterized in that: The driving mechanism (6) further comprises a driving rod (62), wherein the driving rod (62) is arranged on the top cover (61), and the active end of the inner pull rope (51) of the stroke amplification mechanism (5) is connected to the driving rod (62).

11. A stroke amplification structure for a cup cover according to claim 10, characterized in that: The active end of the pull rope (51) is provided with a second connecting member (53), and the second connecting member (53) is rotatably connected to the driving rod (62).

12. The stroke amplification structure for a cup cover according to claim 9, characterized in that: The driving mechanism (6) further comprises a driving block (63), and the driving block (63) can be arranged on the top of the top cover (61) or the side wall of the top cover (61); the top cover (61) is rotated by applying an external force from the top or side of the top cover (61), thereby driving the stroke amplification mechanism (5) to operate.

13. A cup cover, comprising a stroke amplification structure for a cup cover according to any one of claims 1 to 12, characterized in that: It also comprises a top cover (61) and a positioning mechanism (8). When an external force is applied to the driving mechanism (6) to cause it to rotate and drive the traction rope (2) to move to a certain position in the direction of the cup cover base, the positioning mechanism (8) positions the driving mechanism (6) to prevent the positioning mechanism (8) from moving in the opposite direction when the external force is lost.

14. A cup cover according to claim 13, characterized in that: The positioning mechanism (8) is positioned by magnetic attraction, sleeve connection or clamping.

15. A cup cover according to claim 14, characterized in that: The positioning mechanism (8) comprises a first magnetic positioning member (81) and a second magnetic positioning member (82); the first magnetic positioning member (81) is arranged on the cup cover base (1); the second magnetic positioning member (82) is arranged on the top cover (61); the first magnetic positioning member (81) and the second magnetic positioning member (82) are magnetically connected.

16. The cup cover according to claim 13, characterized in that: It also comprises a reset mechanism (4), wherein the reset mechanism (4) is used to drive the stroke amplification mechanism (5) and / or the driving mechanism (6) to reset.

17. A cup cover according to claim 16, characterized in that: The reset mechanism (4) comprises a reset spring (41), one end of the reset spring (41) abuts against the top cover (61) or the cup cover base (1), and the other end of the reset spring (41) abuts against the stroke amplification mechanism (5) and / or the driving mechanism (6). When the stroke amplification mechanism (5) and / or the driving mechanism (6) drive the traction belt to be reeled up, the stroke amplification mechanism (5) and / or the driving mechanism (6) squeeze the reset spring (41), and the reset spring (41) stores elastic potential energy. When the reset spring (41) releases the elastic force, the stroke amplification mechanism (5) and / or the driving mechanism (6) are restored to an initial position.

18. A tea brewing cup, characterized by: It comprises a cup cover, a cup body (9) and a tea brewing piece (3) as claimed in claim 13, wherein the cup cover is detachably connected to the cup body (9), and the free end of the traction rope (2) is used to connect the tea brewing piece (3).

19. The tea brewing cup according to claim 18, characterized in that: The free end of the traction rope (2) is provided with a first magnetic attraction component (21), and the tea brewing component (3) is provided with a second magnetic attraction component (31). The first magnetic attraction component (21) and the second magnetic attraction component (31) are connected by magnetic attraction, sleeve connection or clamping.

20. The tea brewing cup according to claim 19, characterized in that: A sealing channel (12) is fixedly arranged on the cup cover base (1), and the sealing channel (12) is located on one side of the cup cover base (1); one end of the sealing channel (12) is in communication with the through hole (11), and the other end of the sealing channel (12) is closed; the first magnetic attraction component (21) is movably arranged in the sealing channel (12), and the tea brewing component (3) is movably arranged outside the sealing channel (12); The magnetic attraction force of the first magnetic attraction component (21) on the second magnetic attraction component (31) is used to adsorb the tea brewing component (3) to the outer wall of the sealed channel (12); the friction force between the first magnetic attraction component (21) and the sealed channel (12) is defined as a first friction force; the friction force between the tea brewing component (3) and the sealed channel (12) is defined as a second friction force; and the gravity acting on the tea brewing component (3) is greater than the sum of the first friction force and the second friction force.

21. A tea brewing cup according to claim 19 or 20, characterized in that: The number of the second magnetic attraction components (31) is multiple, and the multiple second magnetic attraction components (31) are arranged along the circumference of the tea brewing component (3).

22. A tea brewing cup according to claim 19 or 20, characterized in that: The second magnetic attraction member (31) is an annular magnet, and the first magnetic attraction member (21) has a magnetic attraction force on the outer side wall of the annular magnet.

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