TWI738419B - Screwdriver head with torque indicating function - Google Patents

Abstract

A screwdriver head has a first end and a second end. A barrel is sleeved at the position from the first end to the second end of the screwdriver head, one end of the barrel is regarded as a fixed end and contacts the outer surface of the screwdriver head, and the other end is defined as a movable end that rotatably surrounds the screwdriver head. An indicating part is arranged at the position of the driver head adjacent to the movable end of the barrel. And, a set of scales are arranged on the outer side of the barrel adjacent to the movable end, and the set of scale alignment indication parts display the torque value of the screwdriver head from the first end to the second end. When the screwdriver bit performs a tightening operation of a fastener, the scale is combined with the indicating part to form an indicating functional structure, reminding a user to note that the screwdriver bit continues to exert force, there is the possibility of twisting or breaking, effectively solving the drawbacks of the previous technology .

Description

Screwdriver head with torque indicating function

The invention relates to the technical field of tools, in particular to a screwdriver head, which has a torque indicating function.

As shown in Figure 5, the center of the known screwdriver head 80 is a constricted section 82. One end of the constricted section 82 is connected to a connecting section 81, and the other end extends an operating section 83, which forms a set of staggered Wing pieces 84.

A fastener 85 is provided with a groove (not shown in the figure) conforming to the shape of the tab 84, and the groove receives the operating section 83. The connecting section 81 is inserted into the driving part of a tool (not shown). The tool is one of a hand tool, an electric tool or a pneumatic tool. The screwdriver head 80 drives the fastener 85 to rotate in the direction of an arrow 86 to perform a rotation. Loosen or lock the operation.

At the moment of locking or unscrewing, the fastener 85 transmits a reaction force to the screwdriver head 80 to counteract a force applied by the tool to the screwdriver head 80. The force multiplied by the distance is equal to the torque ( (Or torque). The screwdriver head 80 bears torque and reaction force, which is likely to cause excessive distortion or even breakage of the necked section 82, which has a fragile structure.

Therefore, how to avoid excessive distortion of the screwdriver head 80 has become an urgent problem to be solved in the present invention.

In view of this, the inventor of the present case provides a new screwdriver head with the main purpose of adopting the structure of indicating function to directly inform the torque value of the screwdriver head, and there is the possibility of twisting or breaking the force applied continuously, and effectively solving the drawbacks of the prior art.

To achieve the above-mentioned purpose, the present invention includes: a screwdriver head has a first end and a second end; The outer surface of the screwdriver head, the other end is defined as a movable end that rotatably surrounds the screwdriver head; an indicator portion is provided at the position of the screwdriver head adjacent to the movable end of the barrel; and a set of scales are provided on the outside of the barrel adjacent to the movable end. The scale alignment indicator displays the torque value of the driver bit from the first end to the second end. In addition, a set of torque units are set on the outside of the barrel, and the torque unit is beside the corresponding scale.

Wherein, the screwdriver head extends from the first end to the second end in sequence with a connecting section, a long and narrow section, a conical section and an operating section. The connecting section has a plurality of connected planes, the two planes are connected to form a corner, the corner is sunk into a rectangular surface, and the connecting planes on both sides of the rectangular surface respectively form an edge. The indicating part is a straight line, and the straight line is engraved on one of the conical section and the operating section.

A circular groove and a straight hole with concentric circles are formed on the inner side of the cylinder. One end of the circular groove passes through the fixed end, and the other end passes through the straight hole to the movable end. The diameter of the straight hole is smaller than the diameter of the circular groove to form a shoulder. A large-diameter section and a small-diameter section of concentric circles are formed on the outer side of the cylinder, the circular groove is plunged into the central part of the large-diameter section, and the straight hole penetrates the shaft center of the small-diameter section.

When the barrel is sleeved on the screwdriver head, the connecting section is inserted into the circular groove, and the depth of the connecting section into the circular groove is restricted by the shoulder. The side presses against the wall of the cylinder to form a circular groove, and the supporting operating section extends out of the straight hole, so that the fixed end of the cylinder is fixed in conjunction with the connecting section. When the tube covers the long and narrow section, the diameter of the conical section is smaller than the diameter of the straight hole, but larger than the diameter of the long and narrow section, so that the movable end surrounds the outside of the conical section.

In this way, the screwdriver head of the present invention performs the tightening operation of the fastener, the operating section is inserted into the groove of the fastener shape, the connecting section is detachably combined with a tool, and the tool drives the fastener to rotate through the screwdriver head. The fixed end rotates in the same direction with the connecting section, and the movable end of the connecting barrel rotates around the narrow section and the conical section (that is, the screwdriver head). The scale is combined with the indicator part to form an indicator functional structure, reminding a user to pay attention The screwdriver head continues to exert force, and there is the possibility of twisting or breaking, which effectively solves the disadvantages of the previous technology.

In order to make the purpose, structure, features, and advantages of the present invention easy to understand, one or more embodiments are described in detail below in conjunction with the accompanying drawings.

[Prior Art]

80: Screwdriver head

81: connection segment

82: Necking section

83: Operation section

84: Wing

85: Fastener

86: Arrow

[This creation]

10: Screwdriver head

11: first end

12: second end

13: Instruction Department

14: Connection section

15: Cards Department

16: plane

17: corner

18: Operation section

19: Wings

20: inclined plane

21: Rectangular surface

22: side

23: Joint

24: Long and narrow section

25: Cone section

30: tube

31: fixed end

32: Active end

33: scale

34: Torque unit

35: Large diameter section

36: round groove

37: Small diameter section

38: straight hole

39: Shoulder

87: Arrow

Figure 1 depicts a preferred embodiment of the creative screwdriver head.

Figure 2 shows the internal structure of the screwdriver head assembly.

Figures 3 and 4 show the continuous use of the screwdriver head.

Figure 5 plots the state of use of known screwdrivers.

As shown in Figures 1 and 2, a screwdriver head 10 has a first end 11 and a second end 12. From the first end 11 to the second end 12, a connecting section 14, a narrow section 24, and a Conical section 25 and an operating section 18. Wherein, the connecting section 14 has a plurality of connected planes 16, and the two planes 16 are connected to form a corner 17. Via an inclined surface 20 of the triangle, the corner 17 is connected with a recessed rectangular surface 21, and the two sides of the rectangular surface 21 are connected to the plane 16 to respectively form an edge (or edge line) 22. The bounding rectangular surface 21 and the side 22 constitute a joint 23 of the connecting section 14, and the joint 23 and the elongated section 24 are designed as a single body. The operating section 18 forms a staggered set of fins 19 from the second end 12 to the conical section 25, so that the operating section 18 has a cross-shaped body.

In some embodiments, the operating section 18 may be in-line, rice-shaped, star-shaped, hexagonal, or other geometric shapes.

In addition, an indicator portion 13 is a straight line scribed on the outside of the cone section 25, and the straight line is located at a portion from the first end 11 to the second end 12 of the driver bit 10. Of course, the indication part 13 is engraved on the outer surface of the operating section 18, which is also within the allowable range of the present invention.

One end of a cylinder 30 is regarded as a fixed end 31 and the other end is defined as a movable end 32. A circular groove 36 and a straight hole 38 of concentric circles are formed on the inside of the cylinder 30, and one end of the circular groove 36 is fixed by The end 31 and the other end are connected to the movable end 32 via a straight hole 38. The diameter of the straight hole 38 is smaller than the diameter of the circular groove 36 to form a shoulder 39. A large-diameter section 35 and a small-diameter section 37 of concentric circles are formed on the outside of the cylinder 30. The circular groove 36 sinks into the central part of the large-diameter section 35, and the straight hole 38 penetrates the axial part of the small-diameter section 37.

A set of scales 33 are arranged on the outside of the barrel 30 and adjacent to the movable end 32. A set of torque units 34 are provided on the outside of the barrel 30, and the torque units 34 are numbers next to the corresponding scale 33.

When the barrel 30 is sleeved on the screwdriver head 10, the joint 23 is inserted into the circular groove 36, and the shoulder 39 limits the depth of the connecting section 14 into the circular groove 36. The edge 22 presses the wall of the barrel 30 to form a circular groove 36, and the supporting operating section 18 extends out of the straight hole 38, so that the fixed end 31 and the connecting section 14 (that is, the screwdriver head 10) maintain a fixed connection relationship.

At this moment, the barrel 30 shields the long and narrow section 24 so that the movable end 32 surrounds the circumference of the conical section 25. Among them, the scale 33 with the torque unit 34 being zero is aligned with the indicating portion 13 to complete the preparation for returning to zero.

From the continuous actions in Figures 3 and 4, it is not difficult to understand that the pre-work of the screwdriver head 10 to perform the tightening operation of the fastener 85 is: the fin 19 of the operating section 18 is inserted into the groove of the fastener 85 in a shape (not shown) The connecting section 14 is connected to the driving part of the tool (not shown in the figure), and the driving part brakes a catch 15 of the connecting section 14 so that the connecting section 14 can be detached in combination with the tool.

During locking or unscrewing, in the direction of arrow 87, the tool drives the fastener 85 to rotate through the screwdriver head 10. The torque applied by the tool to the connecting section 14 and the reaction force transmitted by the fastener 85 via the operating section 18 usually counteract each other in the long and narrow section 24. Because the diameter of the conical section 25 is smaller than the diameter of the straight hole 38, but larger than the diameter of the elongated section 24, the connecting section 14 and the fixed end 31 rotate in the same direction, causing the movable end 32 of the barrel 30 to wrap around the conical section 25 (that is, the screwdriver head) Rotate. The scale 33 is aligned with the indicator 13, and the torque unit 34 (ie a number) directly informs the torque value of the driver bit 10. If the tool continues to apply force, the driver bit 10 may be twisted or broken. .

10: Screwdriver head

11: first end

12: second end

13: Instruction Department

30: tube

31: fixed end

32: Active end

33: scale

34: Torque unit

Claims (7)

A screwdriver head with torque indicating function, comprising: a screwdriver head (10) with a first end (11) and a second end (12); a barrel (30) sleeved on the screwdriver head (10) from the first end (11) To the second end (12), one end of the barrel (30) is regarded as the fixed end (31) and is in contact with the appearance of the screwdriver head (10), and the other end is defined as a movable end (32) rotatably surrounding Around the screwdriver head (10); an indicator portion (13) is provided at the position of the screwdriver head (10) adjacent to the movable end (32) of the barrel (30); and a set of scales (33) are provided on the outside of the barrel (30) and move The end (32) is adjacent, and the alignment indicator (13) of the set of scales (33) displays the torque value of the screwdriver head (10) from the first end (11) to the second end (12). For the screwdriver head with torque indicating function as described in claim 1, there is also a set of torque units (34) arranged on the outside of the barrel (30), and the torque unit (34) is beside the corresponding scale (33). As described in claim 1 or 2, the screwdriver head with torque indication function, wherein the first end (11) to the second end (12) extend in sequence a connecting section (14), a long and narrow section (24), a The conical section (25) is connected with an operating section (18). The fixed end (31) is combined with the connecting section (14), so that the tube (30) covers the narrow section (24), and the movable end (32) surrounds the conical section (25). )external. The screwdriver head with torque indicating function according to claim 3, wherein the indicating portion (13) is a straight line, and the straight line is engraved on one of the conical section (25) and the operating section (18). According to claim 3, the screwdriver head with torque indication function, wherein the connecting section (14) has a plurality of connected planes (16), and the two planes (16) are connected to form a corner (17), and the corner (17) ) A rectangular surface (21) is sunk, and the connecting planes (16) on both sides of the rectangular surface (21) respectively form an edge (22); the inner side of the cylinder (30) forms a concentric circular groove (36) and a straight hole (38). One end of the circular groove (36) passes through the fixed end (31), and the other end passes through a straight hole (38) with a smaller diameter to the movable end (32). The diameter of the straight hole (38) is smaller than that of the circular groove ( The diameter of 36) forms a shoulder (39); when the barrel (30) is sleeved on the screwdriver head (10), the connecting section (14) is inserted into the circular groove (36), and the shoulder (39) limits the connecting section (14) Entering the depth of the circular groove (36), the side (22) presses the cylinder (30) to form the wall of the circular groove (36), and the supporting operating section (18) extends out of the straight hole (38); in the cylinder (30) When the long and narrow section (24) is shielded, the movable end (32) surrounds the circumference of the conical section (25). The screwdriver head with torque indication function according to claim 5, wherein the diameter of the conical section (25) is smaller than the diameter of the straight hole (38), but larger than the diameter of the elongated section (24). According to claim 5, the screwdriver head with torque indicating function, wherein the outer side of the barrel (30) forms a large diameter section (35) and a small diameter section (37) of concentric circles, and the circular groove (36) is trapped in the large diameter section (35) and a small diameter section (37). In the central part of the diameter section (35), the straight hole (38) penetrates the axial part of the small diameter section (37).

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