Hand tool with precise rotation function

Abstract

The utility model provides a hand tool with a precise rotation function. The grip comprises a working end. The ratchet ring comprises a ring part and a neck part, ratchets are arranged on the inner wall face of the ring part, and the neck part is arranged at the working end in a penetrating mode. The ring column is arranged in the ring part and provided with a through hole, the outer edge face of the ring column is provided with a notch, a containing groove and a switching groove, the ring column forms a first blocking wall on one side of the switching groove, and a second blocking wall is formed on the other side of the switching groove. The rotary knob comprises a rotary cover and a switching rod, the rotary cover is provided with a plurality of grooves and sleeved outside the ratchet ring, and the switching rod extends in the switching groove in a protruding mode and abuts against the first retaining wall or the second retaining wall under rotation of the rotary cover. The clamping set comprises a positioning elastic piece and an elastic clamping unit, the positioning elastic piece is arranged in the notch and positioned in the groove, and the elastic clamping unit is arranged in the containing groove and is blocked or pressed by the ratchet. The tool shaft penetrates through the screw cap, the through hole and the ratchet ring and is fixed in the grip. Therefore, precise rotation is realized by rotating the knob, and the convenience in use is improved.

Description

Technical Field

[0001] This case relates to hand tools, particularly hand tools with precision rotating functions. Background Art

[0002] Existing tool screwdrivers utilize a ratchet mechanism to achieve one-way rotation, allowing users to tighten or loosen screws or bolts without moving the handle. When the handle is moved in the opposite direction, the ratchet mechanism slides over, keeping the tool head in place, significantly improving operating efficiency.

[0003] Furthermore, because ratchet designs tend to be more efficient than fine-tuned, the inability to make minute adjustments becomes a significant drawback in applications requiring precise manipulation, causing inconvenience in use.

[0004] In view of this, the applicant has conducted in-depth research on the above-mentioned existing technologies and applied scientific theories to try his best to solve the above-mentioned problems, which has become the goal of the applicant's improvement. Utility Model Content

[0005] One purpose of the present invention is to provide a hand tool with a precision rotation function, which can be precisely rotated by turning a knob, thereby increasing convenience in use.

[0006] To achieve the above-mentioned objectives, this invention provides a hand tool with precision rotation function. The handle includes a working end. The ratchet ring includes a ring portion and a neck portion connected to the ring portion. The inner wall of the ring portion is provided with a plurality of ratchet teeth, and the neck portion is inserted into the working end. A ring column is mounted in the ring portion. The center of the ring column is provided with a through hole. The outer edge of the ring column is provided with a notch, a pair of receiving grooves, and a switching groove. The ring column forms a first stop wall on one side of the switching groove and a second stop wall on the other side. The knob includes a rotary cover and a switching rod mounted within the rotary cover. The rotary cover is provided with a plurality of grooves and fits over the ratchet ring. The switching rod protrudes into the switching groove and opens the first or second stop wall when the rotary cover is rotated. The latch assembly includes a positioning spring and a pair of elastic latch units. The positioning spring is disposed in the notch and positioned in one of the grooves. Each elastic latch unit is disposed in each receiving groove and is blocked or pressed by one of the ratchet teeth. The tool shaft passes through the rotary cover, the through hole, and the ratchet ring and is fixed to the handle.

[0007] In one embodiment of the present invention, the hand tool further includes a locking member disposed at the working end, and one end of the tool shaft is coupled to the handle via the locking member.

[0008] In one embodiment of the present case, a plurality of protrusions are provided on the outer edge surface of the neck, and a plurality of slots are provided on the working end. The neck is positioned on the working end by snapping the protrusions into the slots.

[0009] In one embodiment of the present case, the notch and the switching slot are located on opposite sides of the ring column and are disposed on a top surface of the ring column.

[0010] In one embodiment of the present case, the receiving groove is located on the outer edge surface of the annular column and is disposed opposite to one side of the first retaining wall and the second retaining wall.

[0011] In one embodiment of the present invention, a latch block is formed on the inner wall of the rotary cover, and the switch rod protrudes from the middle position of the latch block toward the center of the rotary cover. The size of the latch block corresponds to the size of the switch slot.

[0012] In one embodiment of the present case, the positioning spring includes a convex arc and two elastic arms connected to the convex arc. The size of the convex arc corresponds to the size of the groove. The two elastic arms respectively lean against two opposite walls of the groove.

[0013] In one embodiment of the present case, each latch unit includes a latch plate and a spring elastically abutting against the latch plate. One end of the latch plate protrudes out of the receiving groove and retracts into the receiving groove when pressed by one of the ratchets.

[0014] In one embodiment of the present case, the cross-section of each latching piece is E-shaped, including a straight rib and a first transverse rib, a second transverse rib and a third transverse rib extending laterally from the straight rib. One side of the straight rib is blocked or pressed by one of the ratchets, and the spring is placed on the second transverse rib.

[0015] In one embodiment of the present case, the tool shaft includes a working section and a fixed section connected to the working section. The working section protrudes from the working end of the handle and is provided with a tool hole. The fixed section is provided with a plurality of threads.

[0016] Compared to the conventional method, the hand tool with a precise rotation function of the present invention can switch the rotation direction by rotating the knob. When the handle is rotated in the clockwise direction, the ratchet teeth of the ratchet ring will continuously press the pressing surface of the latch plate, and at this time, the handle will rotate idly relative to the ring column; on the other hand, when the handle is rotated in the counterclockwise direction, the ratchet teeth of the ratchet ring will be blocked by the blocking surface of the latch plate; therefore, when the handle is rotated in the counterclockwise direction, the handle will drive the ring column to rotate counterclockwise; accordingly, the tool shaft can rotate when the handle is rotated in the counterclockwise direction. In addition, when the knob of the present invention is rotated counterclockwise until the switching rod contacts the first blocking wall, the tool shaft can not only rotate when the handle is rotated in the counterclockwise direction, but also precisely rotate in the counterclockwise direction with the knob. Similarly, the other rotation direction also has the same rotation function, which improves the convenience of the hand tool of the present invention in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 and Figure 2 Schematic diagram of the three-dimensional appearance of the hand tool with precision rotation function from two sides.

[0018] Figure 3This is a three-dimensional exploded schematic diagram of the hand tool with precision rotation function in this case.

[0019] Figure 4 This is a schematic diagram of the three-dimensional appearance of the knob in this case.

[0020] Figure 5 It is a combined sectional view of the hand tool in this case.

[0021] Figure 6 and Figure 7 Schematic diagram of the use of hand tools in this case.

[0022] Figure 8 and Figure 9 This is another schematic diagram of the hand tool in this case.

[0023] Figure 10 and Figure 11 This is another schematic diagram of the use of the hand tool in this case.

[0024] In the picture:

[0025] 1: Hand tool; 10: Handle; 11: Working end; 111: Slot; 20: Ratchet ring; 21: Ring portion; 211: Ratchet; 22: Neck; 221: Protrusion; 30: Ring column; 300: Perforation; 301: Outer edge surface; 302: Top surface; 31: Notch; 32: Receiving groove; 33: Switching groove; 34: First retaining wall; 35: Second retaining wall; 40: Knob; 41: Screw cap; 410: Groove; 411: First groove; 412: Middle groove; 413: Second groove; 42: Switching lever; 43: Clamping block; 50: Clamping assembly; 51: Positioning spring; 511: Convex arc; 512: Elastic arm; 52: Elastic latch unit; 521: Clamping piece; 5211: Blocking surface; 5212: Pressing surface; 522: Spring; 523: Straight rib; 524: First transverse rib; 525: Second transverse rib; 526: Third transverse rib; 60: Tool shaft; 61: Working section; 610: Tool hole; 62: Fixing section; 620: Thread; 70: Locking piece. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] Please refer to Figure 1 and Figure 2, which is a schematic three-dimensional appearance diagram of the hand tool with precision rotation function in this case from two sides. The hand tool 1 with precision rotation function in this case includes a handle 10, a ratchet ring 20, a ring column 30, a knob 40, a latch assembly 50 and a tool shaft 60. The ratchet ring 20 is coupled to the handle 10. The latch assembly 50 is mounted in the ring column 30 and is disposed in the ratchet ring 20 together with the ring column 30. The knob 40 is sleeved outside the ratchet ring 20. One end of the tool shaft 60 passes through the ring column 30 and the ratchet ring 20 and is fixed to the handle 10. The other end of the tool shaft 60 protrudes from the knob 40 and is used to rotate a stud or a nut. The hand tool 1 with precision rotation function is described in more detail below.

[0028] Please refer to Figures 3 to 5 , which is a three-dimensional exploded schematic diagram of the hand tool with precision rotation function of this case, a three-dimensional appearance schematic diagram of the knob, and a combined cross-sectional view of the hand tool. The handle 10 of this case includes a working end 11. The ratchet ring 20 includes a ring portion 21 and a neck portion 22 connected to the ring portion 21. The inner wall surface of the ring portion 21 is provided with a plurality of ratchet teeth 211. The neck portion 22 is inserted into the working end 11. In this embodiment, the working end 11 is provided with a plurality of slots 111. In addition, the outer edge surface of the neck portion 22 is provided with a plurality of protrusions 221. The neck portion 22 is positioned on the working end 11 by the protrusions 221 snapping into the slots 111.

[0029] Furthermore, the ring post 30 is disposed within the ring portion 21. A through-hole 300 is centrally disposed within the ring post 30, and an outer edge 301 of the ring post 30 is provided with a notch 31, a pair of receiving grooves 32, and a switching groove 33. The ring post 30 forms a first retaining wall 34 on one side of the switching groove 33 and a second retaining wall 35 on the other side. In this embodiment, the pair of receiving grooves 32 are located on the outer edge 301 of the ring post 30, oppositely disposed on one side of the first retaining wall 34 and the second retaining wall 35. Furthermore, the notch 31 and the switching groove 33 are located on opposite sides of the ring post 30, and are disposed on a top surface 302 of the ring post 30.

[0030] The knob 40 includes a rotary cover 41 and a switching rod 42 disposed in the rotary cover 41. The rotary cover 41 is provided with a plurality of grooves 410 and is fitted over the outside of the ratchet ring 20. The switching rod 42 protrudes into the switching groove 33 and abuts against the first retaining wall 34 or the second retaining wall 35 when the rotary cover 41 is rotated. In this embodiment, the grooves 410 include a first groove 411, a middle groove 412 and a second groove 413. In addition, a latch block 43 is formed on the inner wall surface of the rotary cover 41. The switching rod 42 protrudes from the middle position of the latch block 43 toward the center of the rotary cover 41, and the size of the latch block 43 is set to correspond to the size of the switching groove 33.

[0031] Furthermore, the latch assembly 50 includes a positioning spring 51 and a pair of elastic latch units 52. The positioning spring 51 is disposed in the notch 31 and positioned in one of the grooves 410. Each elastic latch unit 52 is disposed in each of the receiving grooves 32 and is blocked or pressed by one of the ratchet teeth 211.

[0032] In this embodiment, the positioning spring 51 includes a convex arc 511 and two elastic arms 512 connected to the convex arc 511. The dimensions of the convex arc 511 correspond to the dimensions of the groove 410. The two elastic arms 512 respectively abut against two opposing walls of the notch 31. In addition, each elastic latch unit 52 includes a latching piece 521 and a spring 522 elastically abutting against the latching piece 521. One end of the latching piece 521 protrudes from the receiving groove 32 and retracts into the receiving groove 32 when pressed by one of the ratchet teeth 211.

[0033] Specifically, each latching piece 521 has an E-shaped cross-section, comprising a straight rib 523 and a first transverse rib 524, a second transverse rib 525, and a third transverse rib 526 extending laterally from the straight rib 523. One side of the straight rib 523 is blocked or pressed by one of the ratchet teeth 211. Furthermore, the spring 522 is sheathed on the second transverse rib 525.

[0034] Furthermore, the tool shaft 60 passes through the screw cap 41, the through-hole 300 of the ring column 30, and the ratchet ring 20, and is fixed to the handle 10. The hand tool 1 of this case further includes a locking member 70 disposed at the working end 11. One end of the tool shaft 60 is coupled to the handle 10 via the locking member 70. Specifically, the tool shaft 60 includes a working section 61 and a fixing section 62 connected to the working section 61. The working section 61 protrudes from the working end 11 of the handle 10 and is provided with a tool hole 610. Furthermore, the fixing section 62 is provided with a plurality of threads 620. Accordingly, the distal end of the tool shaft 60 is coupled to the working end 11 by the threads 620 and the locking member 70 being mutually locked.

[0035] Please continue to refer to Figure 6 and Figure 7 , is a schematic diagram of the use of the hand tools in this case. Figure 6As shown, when the knob 40 of this embodiment is not rotated, the convex arc 511 of the positioning spring 51 is positioned on the middle groove 412. Specifically, the latching piece 521 of this embodiment includes a blocking surface 5211 and a pressing surface 5212. The blocking surface 5211 and the pressing surface 5212 are arranged vertically and are blocked or pressed by the ratchet teeth 211 of the ratchet ring 20. It is worth noting that the switching lever 42 is located in the middle of the switching groove 33. In addition, the latching block 43 of the knob 40 is located between the first retaining wall 34 and the second retaining wall 35. The latching block 43 does not press on either elastic latching unit 52. At this time, the latching piece 521 of the elastic latching unit 52 near the first retaining wall 34 (the first latching unit) and the other elastic latching unit 52 near the second retaining wall 35 (the second latching unit) respectively protrude from their respective receiving grooves 32.

[0036] like Figure 7 As shown, the handle 10 of this embodiment can rotate in both directions thanks to the elastic latching unit 52 (first latching unit) near the first retaining wall 34 and another elastic latching unit 52 (second latching unit) near the second retaining wall 35. Specifically, when the handle 10 is rotated clockwise or counterclockwise, the ratchet teeth 211 of the ratchet ring 20 are engaged by the latching surface 5211 of the latching piece 521. Therefore, when the handle 10 is rotated clockwise or counterclockwise, it drives the ring column 30 to rotate clockwise or counterclockwise. Consequently, the tool shaft 60 can rotate clockwise or counterclockwise within the handle 10.

[0037] Please continue to refer to Figure 8 and Figure 9 , is another schematic diagram of the use of the hand tool of this case. The hand tool 1 of this case can switch the rotation direction by rotating the knob 40. Figure 8 As shown, when the knob 40 of this embodiment is rotated counterclockwise, the switching rod 42 moves along the switching slot 33 and abuts the first retaining wall 34, and the convex arc 511 of the positioning spring 51 is positioned on the first groove 411. At this time, the elastic latch unit 52 (first latch unit) near the first retaining wall 34 is pressed by the latch block 43 and retracts into the receiving slot 32. In addition, for the other elastic latch unit 52 (second latch unit) near the second retaining wall 35, an outer end of the latch piece 521 protrudes from the receiving slot 32. In more detail, the latch piece 521 of this embodiment includes a retaining surface 5211 and a pressing surface 5212. The retaining surface and the pressing surface 5212 are arranged vertically and are retained or pressed by the ratchet teeth 211 of the ratchet ring 20.

[0038] like Figure 9As shown, when the knob 40 of this embodiment is rotated counterclockwise, the ratchet ring 20 rotates along with the rotation of the handle 10. The elastic latching unit 52 (first latching unit) of the latch assembly 50, located near the first retaining wall 34, retracts into the receiving groove 32. The handle 10 is unidirectionally rotated under the action of the elastic latching unit 52 (second latching unit) located near the second retaining wall 35. Specifically, when the handle 10 is rotated clockwise, the ratchet teeth 211 of the ratchet ring 20 continuously press against the pressing surface 5212 of the latching plate 521. At this time, the handle 10 rotates idly relative to the ring column 30. On the other hand, when the handle 10 is rotated counterclockwise, the ratchet teeth 211 of the ratchet ring 20 are stopped by the retaining surface 5211 of the latching plate 521. Therefore, when the handle 10 rotates in the counterclockwise direction, the handle 10 will drive the ring column 30 to rotate in the counterclockwise direction. Accordingly, the tool shaft 60 can rotate when the handle 10 rotates in the counterclockwise direction.

[0039] It should be noted that when the knob 40 of this case is rotated counterclockwise until the switch rod 42 abuts the first stop wall 34, the tool shaft 60 can not only be rotated when the handle 10 is rotated counterclockwise, but also can be precisely rotated counterclockwise along with the knob 40.

[0040] Please refer to Figure 10 and Figure 11 , is another schematic diagram of the use of the hand tool in this case. Figure 10 As shown, when the knob 40 of this embodiment is rotated clockwise, the switch lever 42 moves along the switch slot 33 and abuts the second retaining wall 35, and the convex arc 511 of the positioning spring 51 is positioned on the second groove 413. At this time, the elastic latch unit 52 (second latch unit) near the second retaining wall 35 is pressed by the latch block 43 and retracts into the receiving slot 32. Furthermore, for the elastic latch unit 52 (first latch unit) near the first retaining wall 34, an outer end of the latch piece 521 protrudes from the receiving slot 32.

[0041] like Figure 11As shown, when the knob 40 of this embodiment is rotated clockwise, the ratchet ring 20 rotates along with the rotation of the handle 10. The elastic latching unit 52 (second latching unit) of the latch assembly 50, located near the second retaining wall 35, retracts into the receiving groove 32. The handle 10 is unidirectionally rotated under the action of the elastic latching unit 52 (first latching unit) located near the first retaining wall 34. Specifically, when the handle 10 is rotated counterclockwise, the ratchet teeth 211 of the ratchet ring 20 continuously press against the pressing surface 5212 of the latching plate 521. At this time, the handle 10 rotates idly relative to the ring column 30. On the other hand, when the handle 10 is rotated clockwise, the ratchet teeth 211 of the ratchet ring 20 are stopped by the retaining surface 5211 of the latching plate 521. Therefore, when the handle 10 rotates in a clockwise direction, the handle 10 drives the ring column 30 to rotate in a clockwise direction. Accordingly, the tool shaft 60 can rotate when the handle 10 rotates in a clockwise direction.

[0042] It should be noted that when the knob 40 of this case is rotated clockwise until the switch rod 42 abuts the second stop wall 35, the tool shaft 60 can not only be rotated when the handle 10 is rotated clockwise, but also can be precisely rotated clockwise along with the knob 40.

[0043] The above-described embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. A hand tool with precision rotation function, characterized in that: include: a handle including a working end; A ratchet ring, comprising a ring portion and a neck portion connected to the ring portion, wherein the inner wall surface of the ring portion is provided with a plurality of ratchets, and the neck portion is inserted through the working end; a ring column disposed in the ring portion, the center of the ring column being provided with a through hole, the outer edge of the ring column being provided with a notch, a pair of receiving grooves, and a switching groove, the ring column forming a first retaining wall on one side of the switching groove and a second retaining wall on the other side; A knob comprising a rotary cover and a switching lever disposed within the rotary cover, wherein the rotary cover is provided with a plurality of grooves and is sleeved on the outside of the ratchet ring, wherein the switching lever protrudes into the switching groove and abuts against the first stop wall or the second stop wall when the rotary cover is rotated; a latch assembly comprising a positioning spring and a pair of elastic latch units, wherein the positioning spring is disposed in the notch and positioned in one of the grooves, and each elastic latch unit is disposed in each receiving groove and is blocked or pressed by one of the ratchets; and A tool shaft passes through the rotary cover, the through hole and the ratchet ring and is fixed in the handle.

2. The hand tool with precision rotation function according to claim 1, wherein: It further includes a locking piece arranged at the working end, and one end of the tool shaft is combined with the handle through the locking piece.

3. The hand tool with precision rotation function according to claim 1, wherein: The outer edge surface of the neck is provided with a plurality of protrusions, and the working end is provided with a plurality of slots. The neck is positioned at the working end by the protrusions being locked in the slots.

4. The hand tool with precision rotation function according to claim 1, wherein: The notch and the switching slot are located on opposite sides of the ring column and are arranged on a top surface of the ring column.

5. The hand tool with precision rotation function according to claim 1, wherein: The receiving groove is located on the outer edge surface of the ring column and is arranged opposite to one side of the first retaining wall and the second retaining wall.

6. The hand tool with precision rotation function according to claim 1, wherein: A latch block is formed on the inner wall surface of the rotary cover, and the switching rod protrudes from the middle position of the latch block toward the center of the rotary cover, and the size of the latch block is set to correspond to the size of the switching slot.

7. The hand tool with precision rotation function according to claim 1, wherein: The positioning spring piece includes a convex arc and two elastic arms connected to the convex arc. The size of the convex arc corresponds to the size of the groove. The two elastic arms respectively lean against two opposite walls of the groove.

8. The hand tool with precision rotation function according to claim 1, wherein: Each elastic latch unit includes a latch piece and a spring elastically abutting against the latch piece. One end of the latch piece protrudes out of the receiving groove and retracts into the receiving groove when pressed by one of the ratchets.

9. The hand tool with precision rotation function according to claim 8, wherein: The cross-section of each latching piece is E-shaped, including a straight rib and a first transverse rib, a second transverse rib and a third transverse rib extending laterally from the straight rib. One side of the straight rib is blocked or pressed by one of the ratchets, and the spring is mounted on the second transverse rib.

10. The hand tool with precision rotation function according to claim 1, wherein: The tool shaft includes a working section and a fixed section connected to the working section. The working section protrudes from the working end of the handle and is provided with a tool hole. The fixed section is provided with a plurality of threads.

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