WO2024020955A1

WO2024020955A1 - Hand-cranked grinder and folding crank thereof

Info

Publication number: WO2024020955A1
Application number: PCT/CN2022/108720
Authority: WO
Inventors: 邹建良
Original assignee: 邹建良
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2024-02-01
Also published as: CN117715569A

Abstract

The present invention relates to a hand-cranked grinder and a folding crank thereof. The crank comprises a rotating structure, a handle and a locking structure, the locking structure being used for fixing the handle to a working state or a storage state, and the handle comprising a cantilever; when in the working state, the cantilever is parallel to the plane where the rotating structure is located, and drives the rotating structure to rotate, so as to drive a hand-cranked grinder main shaft to rotate for grinding; when in the storage state, the cantilever is perpendicular to the plane where the rotating structure is located, so as to be stored. The folding crank of the hand-cranked grinder in the present invention can provide large grinding torque and is foldable, allowing more labor-efficient grinding, smaller occupied space, and convenient storage.

Description

Hand grinder and its folding handle

Technical field

The present invention relates to the field of grinding, and more specifically, to a hand grinder and a folding handle thereof.

Background technique

Hand grinders are widely used for grinding coffee beans. The handle is usually perpendicular to the main axis of the grinder. The handle drives the main shaft of the grinder to rotate and grind the coffee beans. The length of the crank handle is positively related to the grinding torque. The longer the length, the greater the grinding torque and the less effort. However, an excessively long handle makes the grinder take up more space and affects the storage of the grinder. Now it is necessary to design a new structure to ensure that the length of the crank handle is not reduced due to storage problems and at the same time minimize the space occupied by the grinder to make the grinder easy to store.

technical problem

The technical problem to be solved by the present invention is to provide a hand grinder and its folding crank handle in view of the above-mentioned defects of the prior art.

Technical solutions

The invention provides a foldable rocker, which includes a handle, a rotating structure and a locking structure;

The rocker includes a handle, a rotating structure and a locking structure. The locking structure is used to fix the handle in a working state or a storage state. The handle includes a cantilever. When in the working state, the cantilever is in contact with the rotating structure. The plane of the cantilever is parallel to the plane, and the cantilever drives the rotating structure to rotate. When the cantilever is in the stowed state, it is perpendicular to the plane where the rotating structure is located for storage.

In some embodiments, the handle further includes an end and a support arm. The support arm is arranged at a certain angle with the cantilever. The end is located at an end of the support arm away from the cantilever. The end is The handle is limited to rotate circumferentially around the support arm.

In some embodiments, the locking structure includes a card holder, the outer wall of the card holder is provided with a first hole and a second hole, the handle passes through the first hole and the second hole, and the handle switches When the handle is in the working state or the storage state, the first hole fixes the handle in the working state or the storage state.

In some embodiments, the first hole includes an escape hole and a positioning hole, the escape hole is connected with the positioning hole, and the end section matches the positioning hole section;

When the handle is in the working state or the storage state, the end is respectively fitted with the positioning hole to fix the handle in the working state or the storage state. When the handle is switched between the working state and the storage state, , the end slides from the positioning hole to the escape hole to release the fixation of the handle, so that the handle can rotate to switch states, and then slide the end from the escape hole to the positioning hole and Fitted with the positioning hole to fix the handle in the working state or the storage state.

In some embodiments, the end is square, the positioning hole is square, the shape of the escape hole is larger than the shape of the end, and the cross section of the end is the same as that of the positioning hole.

In some embodiments, the escape holes and the positioning holes are arranged circumferentially on the side wall of the card base.

In some embodiments, the second hole is a waist-shaped hole arranged circumferentially along the support arm.

In some embodiments, the rotating structure includes a rotating base for switching the handle between a working state and a storage state. The rotating base is rotatably provided in the card base, and the rotating base is provided with a Pass the handle through and turn the matching pivot hole.

In some embodiments, the rotating structure includes a driving base, the driving base is provided with a round hole for the handle to be inserted, the locking structure includes a toggle structure, and the toggle structure includes a rotationally set limiter. Paddles are provided so that the handle can engage with the end respectively in the working state or the storage state.

In some embodiments, the toggle structure further includes an elastic member, the elastic member is disposed between the limiting paddle and the rotating base, and the elastic member provides elastic force to the limiting paddle. , so that the handle can remain engaged with the end when in the working state or the storage state.

In some embodiments, the elastic member is at least one of a spring, a spring, and a torsion spring.

In some embodiments, the limit paddle and the end are nested in each other, and the limit paddle engages with the end to fix the handle in the working state or the storage state.

In some embodiments, the limiting paddle is provided with a first groove, the end is provided with a first protrusion, and the first groove engages with the first protrusion to lock the The handle is fixed in the working position or the stowed position; and/or;

The limit paddle is provided with a second protrusion, and the end is provided with a second groove. The second groove engages with the second protrusion to fix the handle in a working state or Storage status.

In some embodiments, the first groove is square, the first protrusion is square, the first groove matches the cross section of the first protrusion, and the first protrusion snaps into The first groove is used to fix the handle in a working state or a storage state.

In some embodiments, the second groove is cross-shaped and includes two perpendicularly intersecting strip-shaped grooves, the second protrusion is strip-shaped, and the cross-sections of the strip-shaped groove and the second protrusion are Similarly, when the handle is in the working state or the storage state, the second protrusions are respectively embedded in the strip grooves to fix the handle in the working state or the storage state.

In some embodiments, the side wall surface of the driving base is further provided with a third groove, and the toggle structure is rotatably disposed in the third groove.

In some embodiments, the locking structure includes a third latch, the third latch is inserted into the driving base and the limiting paddle, and the limiting paddle rotates circumferentially around the third latch.

In some embodiments, the support arm is further provided with an annular groove, and the locking structure is further provided with a first latch and a second latch to limit the axial movement of the handle.

In some embodiments, the rotating base is provided with a first latch hole, the driving base is provided with a second latch hole, the first latch is inserted into the first latch hole, and the second latch is inserted into the third latch hole. Two latch holes, the first latch and the second latch are inserted into the annular groove to limit the axial movement of the handle.

In some embodiments, the rotating structure includes a driving member, and the cantilever and the driving member are nested with each other, so that when the handle is in the working state and the stowed state, the driving member and the driving member are Cantilevered nests secure the handle in either the working or stowed position.

In some embodiments, a third protrusion is provided on the driving member, a fourth groove is provided on the cantilever, and the third protrusion is nested with the fourth groove to fix the handle on the Working condition or storage condition; and/or;

The third protrusion is provided on the cantilever, and the fourth groove is provided on the driving member to fix the handle in a working state or a storage state.

In some embodiments, the driving base is also provided with a first locking hole, the cantilever is also provided with a first locking hole, the locking structure includes a locking member, and the locking member is inserted into the first locking hole. hole and the first locking hole to lock the driving seat and the cantilever; or;

The locking structure is a latch, and the latch passes through the first locking hole and the first locking hole. The first locking hole and the latch are connected through an elastic structure to control the movement of the latch. Insert or withdraw.

In some embodiments, the rotating structure is further provided with a positioning member, the positioning member is nested with the main shaft of the grinding machine, and the handle drives the rotating structure to rotate to drive the main shaft of the grinding machine to rotate.

A hand grinder includes a main shaft and a foldable crank handle. The rotating structure of the foldable crank handle is connected to the main shaft to drive the main shaft to rotate for grinding.

beneficial effects

The hand grinder and its folding handle when implementing the present invention have the following beneficial effects. The folding handle of the hand grinder of this embodiment can provide a larger grinding torque and is foldable. Grinding is more labor-saving and takes up space. Less and easier to store.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and examples. In the accompanying drawings:

Figure 1 is an exploded view of the folding rocker in the first embodiment;

Figure 2 is a front view of the folding tremolo handle in Figure 1;

Figure 3 is a top view of the foldable rocker in Figure 1;

Figure 4 is a side view of the foldable rocker in Figure 1;

Figure 5 is an exploded view of the foldable rocker in the second embodiment;

Figure 6 is a front view of the foldable rocker in Figure 5;

Figure 7 is a top view of the foldable rocker in Figure 5;

Figure 8 is a side view of the folding rocker in Figure 5;

Figure 9 is an exploded view of another foldable rocker in the second embodiment;

Figure 10 is a front view of the folding tremolo handle in Figure 9;

Figure 11 is a top view of the folding rocker in Figure 9;

Figure 12 is a side view of the folding rocker in Figure 9;

Figure 13 is an exploded view of the folding rocker in the third embodiment;

Figure 14 is an exploded view of the folding rocker in Figure 13 from another angle;

Figure 15 is a front view of the folding rocker in Figure 13;

Figure 16 is a top view of the folding rocker in Figure 13;

Figure 17 is a side view of the folding rocker handle in Figure 13.

Embodiments of the invention

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figures 1, 5, 9, and 13, in this embodiment, the hand grinder includes a foldable rocker and a spindle. The foldable rocker includes a handle 1, a rotating structure 2, and a locking structure 3. , the locking structure 3 is used to fix the handle 1 in the working state or the storage state. The handle 1 includes a cantilever 13. In the working state, the cantilever 13 is parallel to the plane where the rotating structure 2 is located. When in the stored state, the cantilever 13 is parallel to the plane where the rotating structure 2 is located. The plane is vertical, reducing the space occupied by the crank handle for storage.

The rotating structure 2 is nested with the main shaft. When the handle 1 drives the rotating structure 2 to rotate, the rotating structure 2 drives the main shaft to rotate, and then the main shaft rotates for grinding.

As shown in Figures 1 to 4, in the first embodiment, the handle 1 is L-shaped. The handle 1 also includes an end 11 and a support arm 12. The support arm 12 and the cantilever 13 are arranged at a certain angle. The end 11 is located on the support. The end of the arm 12 away from the cantilever 13, the end 11 is used to limit the circumferential rotation of the handle 1, the support arm 12 passes through the rotating structure 2, so that the handle 1 drives the rotating structure 2 to rotate, the cantilever 13 drives the handle 1 to rotate, and then drives the rotation Structure 2 rotates.

The locking structure 3 includes a card seat 31. The outer wall of the card seat 31 is provided with a first hole 311 and a second hole 312. The handle 1 is penetrated through the first hole 311 and the second hole 312, so that the support arm 12 is penetrated through the rotating structure 2. One hole 311 is used to fix the handle 1 in the working state or the storage state. When the handle 1 is in the switching state, the support arm 12 slides in the second hole 312.

Furthermore, the first hole 311 includes an escape hole 3112 and a positioning hole 3111. The escape hole 3112 is connected with the positioning hole 3111, so that the end 11 can slide in the first hole 311 and the state of the handle 1 can be switched conveniently.

In this embodiment, when the handle 1 is in the working state or the storage state, the ends 11 are respectively engaged with the positioning holes 3111 to fix the handle 1 in the working state or the storage state. The handle 1 drives the rotating structure 2 to rotate, and the handle 1 When switching the state, the end 11 slides from the positioning hole 3111 to the escape hole 3112 to release the fixation of the handle 1, and the support arm 12 rotates around the central axis of the escape hole 3112 to allow the handle 1 to rotate to switch states, and the end 11 moves from the escape hole 3111 to the escape hole 3112. The hole 3112 slides into the positioning hole 3111 and engages with the positioning hole 3111 to fix the handle 1 in the working state or the storage state to complete the state switching.

Preferably, the end 11 is square, the positioning hole 3111 is square, and the cross sections of the end 11 and the positioning hole 3111 match, so that the end 11 and the positioning hole 3111 can be accurately engaged, thereby improving the stability of the handle 1 in the working state and the storage state. For stability, the shape of the escape hole 3112 is larger than the shape of the end 11 so that the handle 1 can rotate and switch states.

In other embodiments, the end 11 is in a shape such as a pentagon or a hexagon with straight sides, and the cross section of the positioning hole 3111 matches the cross section of the end 11 so that the end 11 accurately engages with the positioning hole 3111 , improve the stability of the handle 1 in the working state and the storage state.

Preferably, the escape holes 3112 and the positioning holes 3111 are arranged circumferentially on the side wall of the card seat 31 so that the end 11 can quickly slide between the escape holes 3112 and the positioning holes 3111 when the handle 1 switches states.

In this embodiment, the second hole 312 is a waist-shaped hole arranged along the circumferential direction of the support arm 12, so that when the handle 1 is in the switching state, the support arm 12 can slide at a certain angle in the second hole 312.

In this embodiment, the rotating structure 2 also includes a rotating base 21 for switching the handle 1 to a working state or a storage state. The rotating base 21 is rotatably arranged in the card base 31. The rotating base 21 is provided with a hole for the handle 1 to pass through. And rotate the matching rotating hole 211. When the handle 1 switches states, the rotating base 21 is turned to drive the handle 1 to rotate, so that the end 11 slides from the positioning hole 3111 to the avoidance hole 3112, and the handle 1 is released from fixation to complete the state switching. , after the state switching of handle 1 is completed, turn the rotating base 21 to drive the handle 1 to rotate, so that the end 11 slides from the avoidance hole 3112 to the positioning hole 3111, and engages with the positioning hole 3111, fixing the handle 1 in the working state or storage state.

In this embodiment, the locking structure 3 is also provided with a first latch 32, and the support arm is also provided with an annular groove 121 to limit the axial movement of the handle 1, reduce the shaking of the handle 1 when rotating, and improve the handle 1 stability.

Further, the first latch 32 is inserted into the first latch hole 212 and locked into the annular groove 121 to limit the axial movement of the handle 1. When the handle 1 rotates to switch states, the handle 1 rotates along the first latch 32, Since the first latch 32 is engaged in the annular groove 121 , the handle 1 will not move axially when rotating, thereby reducing shaking and improving the stability of the handle 1 .

In this embodiment, the rotating structure 2 is also provided with a first disk bracket 23 and a first positioning part 22. The first disk bracket 23 is used to support structural components. The positioning part 22 is nested with the grinding machine spindle. The handle 1 drives The rotating structure 2 rotates to drive the main shaft of the grinding machine to rotate.

As shown in Figures 5 to 12, in the second embodiment, the handle 1 also includes an end 11 and a support arm 12. The support arm 12 is arranged at a certain angle with the cantilever 13. The end 11 is located away from the support arm 12 and away from the cantilever. One end of 13, the end 11 is used to limit the circumferential rotation of the handle 1, the support arm 12 passes through the rotating structure 2, so that the handle 1 drives the rotating structure 2 to rotate, the cantilever 13 drives the handle 1 to rotate, and then drives the rotating structure 2 to rotate.

The rotating structure 2 includes a driving base 24. The driving base 24 is provided with a round hole 241 for the handle 1 to be inserted. The locking structure 3 includes a toggle structure 33. The toggle structure 33 includes a rotationally arranged limiting paddle 331 so that the handle 1 In the working state or the storage state, the handle 1 can be respectively engaged with the end 11 to fix the handle 1 in the working state or the storage state.

Further, the toggle structure 33 also includes an elastic member 332. The elastic member 332 is provided between the limiting paddle 331 and the rotating base 31. The elastic member 332 provides elastic force to the limiting paddle 331 so that the elastic member 332 returns to its original position. Engage with terminal 11.

In this embodiment, when the handle 1 is in the working state or the stored state, under the action of elastic force, the limiting paddle 331 is tightly engaged with the end 11 to fix the handle 1 in the working state or the stored state, and the handle 1 is moved When switching the state, move the limit paddle 331 to separate the limit paddle 331 from the end 11, release the fixation of the handle 1, and the support arm 12 rotates around its own central axis to change the direction of the cantilever 13 so that the handle 1 Rotate to switch the state, and then release the limit paddle 331. The limit paddle 331 returns under the action of elastic force and engages with the end 11 to fix the handle 1 in the working state or the storage state to complete the state switching. .

In this embodiment, the elastic member 332 is an elastic piece. One side of the elastic piece is in contact with the limiting paddle 331 and the other side is in contact with the driving seat 24 to better apply elastic force to the limiting paddle 331. In other implementations, In this example, the elastic member 332 may also be a spring, a torsion spring, or a combination of elastic pieces, springs, torsion springs, etc.

In this embodiment, the limiting paddle 331 and the end 11 are nested in each other to fix the handle 1 in the working state or the storage state.

Further, the limit paddle 331 is provided with a first groove 3311, and the end 11 is provided with a first protrusion 111. The first groove 3311 engages with the first protrusion 111 to fix the handle 1 in a working state or Storage status.

In other embodiments, the limit paddle 331 is provided with a second protrusion 3312, and the end 11 is provided with a second groove 112. The second groove 112 engages with the second protrusion 3312 to fix the handle 1 on the Working state or storage state.

Preferably, as shown in Figures 5 to 8, the first groove 3311 is square, the first protrusion 111 is square, and the cross-sections of the first groove 3311 and the first protrusion 111 match, so that the end 11 is The positioning holes 2111 are accurately engaged to fix the handle 1 in the working state or the stored state, reduce the shaking of the handle 1 in the working state and the stored state, and improve the stability of the handle 1 in the working state and the stored state.

It can be understood that in other embodiments, as shown in FIGS. 9 to 12 , the second groove 112 is cross-shaped and includes two perpendicularly intersecting strip-shaped grooves, and the second protrusion 3312 is strip-shaped. The cross-sections of the groove and the second protrusion 3312 match. When the handle 1 is in the working state, the second protrusion 3312 snaps into a groove to fix the handle in the working state. When the handle 1 is in the stowed state, the second protrusion 3312 Snap into another groove to accurately engage the end 11 with the positioning hole 2111 to fix the handle 1 in the stored state, reduce the shaking of the handle 1 in the working state and the stored state, and improve the performance of the handle 1 in the working state and the stored state. state stability.

In this embodiment, the side wall surface of the driving base 24 is also provided with a third groove 242. The toggle structure 33 is rotated and disposed in the third groove 242. The locking structure 3 includes a third latch 35, and the third latch 35 is inserted into the driving The base 24 and the limiting paddle 331 rotate circumferentially around the first latch 32 in the third groove 242 so that the paddle can be separated from or engaged with the end 11 .

In this embodiment, the locking structure 3 is also provided with a second latch 34, and the outer ring of the support arm 12 is provided with an annular groove 121 to limit the axial movement of the handle 1, reduce the shaking of the handle 1 when rotating, and improve Stability of handle 1.

Further, the driving base 24 is provided with a second latch hole 243, the second latch 34 is inserted into the second latch hole 243, and the second latch 34 is inserted into the annular groove 121 to limit the axial movement of the handle 1. When rotating to switch state, the handle 1 rotates along the second latch 34. Since the second latch 34 is engaged in the annular groove 121, the handle 1 will not move axially during rotation, thereby reducing shaking and improving the stability of the handle 1.

In this embodiment, the rotating structure 2 is also provided with a disc bracket 23 and a positioning piece 22. The disc bracket 23 is used to support structural components. The positioning piece 22 is nested with the grinding machine spindle. The handle 1 drives the rotating structure 2 to rotate. Drives the grinder spindle to rotate.

As shown in Figures 13 to 17, in the third embodiment, the rotating structure 2 includes a driving member 25, and the driving member 25 and the cantilever 13 are nested in each other to fix the handle 1 in the working state or the storage state, and the handle 1 is moved When switching the state, the cantilever 13 is separated from the driving member 25, and the fixation of the handle 1 is released. The cantilever 13 rotates around the central axis of the driving member 25, so that the handle 1 rotates to switch states, and then the driving member 25 and the cantilever 13 are nested. Fix the handle 1 in the storage state or the working state to complete the state switching.

Further, third protrusions 251 and fourth grooves 131 are provided on adjacent sides of the driving member 25 and the cantilever 13. The third protrusion 251 is provided on the driving member 25, and the fourth groove 131 is provided on the cantilever 13. The third protrusion 251 is nested in the fourth groove 131 to fix the handle in the working state or the storage state.

In other embodiments, the third protrusion 251 is provided on the cantilever 13 , the fourth groove 131 is provided on the driving member 25 , and the third protrusion 251 is nested with the fourth groove 131 to fix the handle 1 on the working surface. state or storage state.

In this embodiment, the driving member 25 is also provided with a first locking hole 252, the cantilever 13 is also provided with a first locking hole 132, and the locking structure 3 includes a locking member 36. When the handle 1 is in the working state or the storage state, The locking member 36 is inserted into the first locking hole 252 and the first locking hole 132 to lock the driving member 25 and the cantilever 13. When the handle 1 switches states, the locking member 36 is pulled out to unlock the driving base 24 and the cantilever 13. , the cantilever 13 is separated from the driving part 25, the cantilever 13 rotates around the central axis of the driving part 25, so that the handle 1 rotates to switch states, and then the driving part 25 is nested with the cantilever 13, and the locking piece 36 is inserted to lock the driving base 24 and the cantilever 13 .

In other embodiments, the locking structure 3 is a latch, and the latch passes through the first locking hole 252 and the first locking hole 132. The first locking hole 252 and the latch are connected through an elastic structure to control the insertion or withdrawal of the latch. , when the handle 1 is in the working state or the storage state, the latch locks the driving base 24 and the cantilever 13 under the action of the elastic force provided by the elastic structure. When the handle 1 is in the working state or the storage state, the latch is pulled out, and the cantilever 13 and The driving part 25 separates, and the cantilever 13 rotates around the central axis of the driving part 25, so that the handle 1 rotates to switch states, and then the latch is released, and the latch automatically returns to lock the driving base 24 and the cantilever 13.

In this embodiment, the rotating structure 2 is also provided with a disc bracket 23 and a positioning member 22. The hand grinder also includes a shell and a material box. The disc bracket 23 is used to support structural components, and the shell is set outside the main shaft. , the rotating structure is installed at one end of the casing, the positioning piece 22 is nested with the spindle, the handle 1 drives the rotating structure 2 to rotate to drive the spindle to rotate for grinding, and the material box is detachably installed at the other end of the casing to receive the grinding Completed materials.

The folding handle of the hand grinder of this embodiment can provide a larger grinding torque and is foldable, making grinding more labor-saving and occupying less space, making it easy to store.

It can be understood that the above technical features can be used in any combination without limitation.

The above are only examples of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, All are similarly included in the patent protection scope of the present invention.

Claims

A foldable rocker, characterized in that the rocker includes a handle (1), a rotating structure (2) and a locking structure (3), and the locking structure (3) is used to move the handle (1) Fixed in the working state or the storage state, the handle (1) includes a cantilever (13). When the cantilever (13) is in the working state, it is parallel to the plane where the rotating structure (2) is located. The cantilever (13) drives The rotating structure (2) rotates, and the cantilever (13) in the stowed state is perpendicular to the plane where the rotating structure (2) is located for storage.
The foldable rocker according to claim 1, characterized in that the handle (1) also includes an end (11) and a support arm (12), and the support arm (12) and the cantilever arm (13) ) is arranged at a certain angle, and the end (11) is located at an end of the support arm (12) away from the cantilever (13).
The foldable rocker according to claim 2, characterized in that the locking structure (3) includes a card seat (31), and the outer wall of the card seat (31) is provided with a first hole (311) and a second hole (311). hole (312), the handle (1) passes through the first hole (311) and the second hole (312), the handle (1) is switched to the working state or the storage state, the first hole (311) Fix the handle (1) in the working state or the storage state.
The foldable rocker according to claim 3, characterized in that the first hole (311) includes an escape hole (3112) and a positioning hole (3111), and the escape hole (3112) and the positioning hole (3111) are connected, and the cross section of the end (11) matches the cross section of the positioning hole (3111);

When the handle (1) is in the working state or the storage state, the end (11) is respectively fitted with the positioning hole (3111) to fix the handle (1) in the working state or the storage state. When the handle (1) is switched between the working state and the storage state, the end (11) slides from the positioning hole (3111) to the escape hole (3112) to release the handle (1) After being fixed so that the handle (1) can rotate and switch states, let the end (11) slide from the escape hole (3112) to the positioning hole (3111) and fit with the positioning hole (3111), To fix the handle (1) in a working state or a storage state.
The foldable rocker according to claim 4, characterized in that the end (11) is square, the positioning hole (3111) is square, and the shape of the escape hole (3112) is larger than the end. The shape of the head (11), the end head (11) and the positioning hole (3111) have the same cross-section.
The foldable rocker according to claim 5, characterized in that the escape holes (3112) and the positioning holes (3111) are arranged circumferentially on the side walls of the card base (31).
The foldable rocker according to claim 6, characterized in that the second hole (312) is a waist-shaped hole arranged circumferentially along the support arm (12).
The foldable tremolo handle according to claim 7, characterized in that the rotating structure (2) includes a rotating base (21) for switching the handle (1) to a working state or a storage state, and the rotating base (21) 21) is rotatably arranged in the card seat (31). The rotating seat (21) is provided with a rotating hole (211) for the handle (1) to pass through and rotate to fit. The rotating seat (21) ) drives the handle (1) to rotate to switch the handle (1) to the working state or the storage state.
The foldable cradle according to claim 2, characterized in that the rotating structure (2) includes a driving base (24), and the driving base (24) is provided with a round hole (241) for the The handle (1) is inserted, and the locking structure (3) includes a toggle structure (33). The toggle structure (33) includes a rotationally set limit paddle (331), so that the handle (1) is In the working state or the storage state, it can be engaged with the end head (11) respectively.
The foldable rocker according to claim 9, characterized in that the dialing structure (33) further includes an elastic member (332), and the elastic member (332) is arranged on the limiting paddle (331). ) and the rotating base (31), the elastic member (332) provides elastic force to the limiting paddle (331), so that the handle (1) can remain in the working state or storage state. Engage with the end (11).
The foldable rocker handle according to claim 10, characterized in that the elastic member (332) is at least one of an elastic piece, a spring, and a torsion spring.
The foldable rocker according to claim 11, characterized in that the limit paddle (331) and the end head (11) are nested in each other, and the limit paddle (331) and The end heads (11) are engaged to fix the handle (1) in a working state or a storage state.
The foldable tremolo handle according to claim 12, characterized in that the limiting paddle (331) is provided with a first groove (3311), and the end (11) is provided with a first protrusion (3311). 111), the first groove (3311) is engaged with the first protrusion (111) to fix the handle (1) in the working state or the storage state; and/or;

The limit paddle (331) is provided with a second protrusion (3312), the end (11) is provided with a second groove (112), and the second groove (112) is connected with the second The protrusions (3312) engage to fix the handle (1) in the working state or the storage state.
The foldable rocker according to claim 13, characterized in that the first groove (3311) is square, the first protrusion (111) is square, and the first groove (3311) Matching the cross section of the first protrusion (111), the first protrusion (111) snaps into the first groove (3311) to fix the handle (1) in a working state or to store it. state.
The foldable rocker according to claim 13, characterized in that the second groove (112) is cross-shaped and includes two vertically intersecting strip grooves, and the second protrusion (3312) It is strip-shaped, and the cross-sections of the strip-shaped groove and the second protrusion (3312) are the same. When the handle (1) is in the working state or the storage state, the second protrusion (3312) is respectively embedded in the handle. Strip-shaped grooves are used to fix the handle (1) in a working state or a storage state.
The foldable tremolo handle according to claim 9, characterized in that the side wall surface of the driving seat (24) is also provided with a third groove (242), and the toggle structure (33) is rotatably arranged at the in the third groove (242).
The foldable cradle according to claim 16, characterized in that the locking structure (3) includes a third latch (35), and the third latch (35) is inserted into the driving base (24) and the The limit paddle (331) rotates circumferentially around the third latch (35).
The foldable rocker according to any one of claims 2 to 17, characterized in that the support arm (12) is also provided with an annular groove (121), and the locking structure (3) is also provided with a third A latch (32) and a second latch (34) are used to limit the axial movement of the handle (1).
The foldable rocker according to claim 18, characterized in that the rotating base (21) is provided with a first latch hole (212), and the driving base (24) is provided with a second latch hole (243). , the first latch (32) is inserted into the first latch hole (212), the second latch (34) is inserted into the second latch hole (243), the first latch (32) and the The second latch (34) engages in the annular groove (121) to limit the axial movement of the handle (1).
The foldable crank according to claim 1, characterized in that the rotation structure (2) includes a driving member (25), and the cantilever (13) and the driving member (25) are nested in each other. , so that when the handle (1) is in the working state or the storage state, the driving member (25) is nested with the cantilever (13) to fix the handle (1) in the working state or the storage state. .
The foldable crank according to claim 20, characterized in that the third protrusion (251) is provided on the driving member (25), and the fourth groove (131) is provided on the cantilever (13), The third protrusion (251) is nested with the fourth groove (131) to fix the handle (1) in the working state or the storage state; and/or;

The third protrusion (251) is provided on the cantilever (13), the fourth groove (131) is provided on the driving member (25), and the third protrusion (251) is connected with the third protrusion (251). Four grooves (131) are nested to fix the handle (1) in a working state or a storage state.
The foldable rocker according to claim 21, characterized in that the driving base (24) is also provided with a first locking hole (252), and the cantilever (13) is also provided with a first locking hole. (132), the locking structure (3) includes a locking member (36), and the locking member (36) is inserted into the first locking hole (252) and the first locking hole (132) to lock. The driving base (24) and the cantilever (13); or;

The locking structure (3) is a latch, and the latch passes through the first locking hole (252) and the first locking hole (132). The first locking hole (252) is connected to the first locking hole (132). The latch is connected through an elastic structure to control the insertion or withdrawal of the latch.
The foldable rocker according to any one of claims 1 to 17 and 20 to 22, characterized in that the rotating structure (2) is also provided with a positioning member (22), and the positioning member (22) is connected to the positioning member (22). The main shaft of the grinding machine is nested, and the handle (1) drives the rotating structure (2) to rotate to drive the main shaft of the grinding machine to rotate.
A hand grinder, characterized in that it includes a main shaft and a foldable crank handle according to any one of claims 1 to 23, and the rotating structure (2) of the foldable crank handle is connected to the main shaft, The spindle is driven to rotate for grinding.