CN209850780U - Hand-held device - Google Patents

Abstract

A hand-held device is used for loading a screwdriver bit to rotate and installing or removing screws, and comprises a shell with an installation space and a torque control device, wherein the torque control device comprises a bearing seat, an output shaft and an annular adjusting part, the bearing seat comprises an outer seat body with an accommodating space and an inner seat body arranged in the accommodating space, the outer seat body and the inner seat body are mutually driven to rotate by a locking element, a plurality of limiting grooves are formed on the outer surface of the outer seat body, an elastic bias element is arranged between the outer seat body and the annular adjusting part, a limiting element is arranged between the elastic bias element and the outer seat body, when the hand-held device rotates, the shell drives the outer seat body to rotate by the limiting element, the annular adjusting part is provided with a limiting block which supports against the elastic bias element, the annular adjusting part adjusts the position of the limiting block which supports against the elastic bias element, thereby adjusting the supporting pressure of the elastic, the preset maximum torque force of the screwdriver head on the screw is adjusted, and the structure is more miniaturized.

Description

Hand-held device

[ technical field ] A method for producing a semiconductor device

The present invention relates to a hand-held device, and more particularly to a hand-held device for loading a screwdriver bit and installing or removing a screw.

[ background of the invention ]

Chinese 208451473 patent of 2019, 2 month 1 day announced discloses an overload prevention screwdriver convenient to use, the tight nut in top that is used for loading the screwdriver handle has set gradually in the longitudinal direction, the draw-in groove that cup joints with one side activity of the tight nut in top, be located the tight steel ball in top of draw-in groove, the tight clamp plate in top that is used for pushing up this steel ball and by the fixed plate of the tight clamp plate in top of the tight spring in top, the user can adjust the position of fixed plate in order to adjust the compression degree of the tight spring in top, thereby adjust the pressure of the tight clamp plate in top to the tight steel ball in top, and then adjust the frictional force between the surface of the tight steel ball in top and draw-in groove and the tight clamp plate in top, finally reach the mesh of the maximum moment that can bear when adjusting. When the maximum torque which can be borne is exceeded, the clamping groove and the jacking pressing plate rotate relatively and do not apply larger torque to the screwdriver handle any more, so that the requirements on screws of different types are met. However, because each structural component is vertically arranged in the prior art, the overall longitudinal length is large, the requirement of a miniaturized product is not facilitated, the carrying is inconvenient, and in addition, the elasticity of the jacking spring is easy to decline, so that the normal use is influenced.

Therefore, there is a need to provide a new handheld device to overcome the above-mentioned drawbacks.

[ Utility model ] content

An object of the utility model is to provide a hand-held device, the structure does benefit to the miniaturization, conveniently carries to have the advantage of the biggest torsion that can bear when more stable regulation rotates.

The purpose of the utility model is realized through the following technical scheme:

a hand-held device is used for loading a screwdriver bit to rotate and installing or removing a screw, the hand-held device comprises a shell and a torsion control device, wherein an installation space is formed in the shell, the torsion control device is installed in the shell and comprises a bearing seat, an output shaft and an annular adjusting part, the bearing seat is installed in the installation part and rotates in the installation part, the output shaft is driven by the bearing seat, the annular adjusting part is sleeved outside the installation part, the bearing seat further comprises an outer seat body and an inner seat body, an accommodating space is formed in the outer seat body, the inner seat body is arranged in the accommodating space, the output shaft and the inner seat body are inserted to drive the screwdriver bit to rotate along with the inner seat body, the outer seat body and the inner seat body are mutually driven to rotate by a locking element, a plurality of limiting grooves are formed in the surface of the outer seat body, and an elastic biasing element is fixedly held outside the installation part and is arranged between the outer surface of, a limiting element pressed by the elastic biasing element is arranged between the elastic biasing element and the outer surface of the outer seat body, when the handheld device rotates, the mounting part drives the outer seat body to rotate by the limiting element, a limiting block pressed against the elastic biasing element is arranged on the surface of an inner ring of the annular adjusting part, and the annular adjusting part rotates outside the mounting part to adjust the position of the limiting block pressed against the elastic biasing element.

Further, the elastic biasing element with spacing component is two, the installation department is including running through two accommodation holes of installation department, two spacing component is located respectively in two accommodation holes, each elastic biasing element be the arc set up in the surface of installation department, each elastic biasing element's one end with the installation department fixing, the other end is for pressing spacing component's free end, the stopper is two, two the stopper is respectively pressed two elastic biasing element.

Furthermore, one end of each elastic biasing element is provided with a fixing part located on the surface of the mounting part, the other end of each elastic biasing element is correspondingly located on the outer side of the accommodating hole and is freely arranged, the handheld device further comprises a lantern ring sleeved on the surface of the mounting part, and the lantern ring fixes the fixing parts of the elastic biasing elements, so that the two elastic biasing elements are fixed on the surface of the mounting part.

Further, the outer seat body comprises a first base part and a ring wall extending from the edge of the first base part, the limit grooves are positioned on the outer surface of the ring wall, the inner seat body rotates in the accommodating space, the inner seat body comprises a second base part in a circular ring plate shape, a protruding part protruding from the center of the second base part, and a plurality of spacing parts extending from the outer edge of the protruding part to the outer edge of the second base part, the spacing parts are uniformly divided into a plurality of identical matching grooves between the outer seat body and the inner seat body, each matching groove comprises an outer matching surface formed on the inner surface of the ring wall and an inner matching surface formed on the outer edge of the protruding part, the middle position of each inner matching surface extends towards the outer matching surface to form a part, and the distance from the two ends of the inner matching surface to the protruding part and the outer matching surface gradually decreases, two locking elements positioned at two ends of the matching groove are arranged in each matching groove, when the outer seat body rotates, the outer matching surface drives one of the two locking elements in each matching groove to move towards the protruding part so that the outer edge of the locking element clamps the outer matching surface and the inner matching surface, and therefore the inner seat body rotates along with the outer seat body in the same direction.

Furthermore, two locking elements in each matching groove are divided into a first locking element and a second locking element, the whole handheld device can rotate clockwise or anticlockwise, and when the handheld device rotates clockwise, the outer matching surface drives the second locking element to move clockwise so that the outer edge of the second locking element clamps the outer matching surface and the inner matching surface.

Further, when the handheld device rotates counterclockwise, the outer fitting surface drives the first locking element to move counterclockwise so that the outer edge of the first locking element clamps the outer fitting surface and the inner fitting surface.

Further, the hand-held device further comprises a driving motor arranged in the installation space, a battery for supplying power to the driving motor, and a speed reducing device driven by the driving motor, the torsion control device also comprises a bracket driven by the speed reducing device to rotate, the bracket comprises a disc-shaped main plate part and a plurality of extension parts which are formed by protruding from the main plate part and are uniformly distributed, each extension part is correspondingly inserted into each matching groove, each extension part is positioned between two locking elements in the same matching groove, when the bracket is driven to rotate by the speed reducing device, each extension part moves in each matching groove along the rotating direction to push against one of two locking elements in the same matching groove, the pushed locking elements push the spacing parts to enable the inner base body to rotate along with the bracket in the same direction.

Further, when the support is driven to rotate by the speed reducing device, the outer seat body is still relative to the inner seat body and the support.

Furthermore, the middle position of the first base is provided with a first through hole penetrating through the first base, the center position of the protruding part is provided with a second through hole penetrating through the inner seat body, the inner edge of the second through hole is of a polygonal structure, the output shaft comprises a first matching part and a first insertion part extending from the first matching part, the outer edge of the first matching part is of a polygonal structure correspondingly arranged with the inner edge of the second through hole, and the first matching part is inserted and matched with the second through hole and the first through hole.

Further, a transmission shaft and a batch seat fixed on the transmission shaft are arranged between the output shaft and the batch head, one end of the transmission shaft is inserted into the first insertion part, the batch seat is fixed on the other end of the transmission shaft, and the batch head is arranged in the batch seat.

Compared with the prior art, the utility model discloses following beneficial effect has: the annular adjusting part adjusts the position of the limiting block abutting against the elastic biasing element through rotation so as to adjust the abutting force of the elastic biasing element on the limiting element, thereby adjusting the preset maximum torque force of the screwdriver head on the screw, and the structure is more miniaturized.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of the handheld device of the present invention.

Fig. 2 is a perspective view of fig. 1 viewed from another direction.

Fig. 3 is a partially exploded perspective view of the hand-held device of the present invention.

Fig. 4 is a partially exploded perspective view of fig. 3 viewed from another direction.

Fig. 5 is a partially exploded perspective view of the hand-held device of the present invention.

Fig. 6 is a partially exploded perspective view of fig. 3 viewed from another direction.

Fig. 7 is a cross-sectional view of the hand-held device of the present invention when the batch head is not loaded, as viewed along line a-a of fig. 1.

Fig. 8 is a cross-sectional view of the hand-held device of the present invention when the batch head is not loaded, as viewed along line B-B of fig. 2.

Fig. 9 is a cross-sectional view of the hand-held device of the present invention when not loaded with bits taken along line C-C of fig. 1.

Fig. 10 is a cross-sectional view of the outer housing of the hand-held device of the present invention as viewed along the line C-C of fig. 1 during idling.

Figure 11 is a cross-sectional view of the ring-shaped adjustment portion of the hand-held device of the present invention as viewed along line C-C of figure 1 as the stop is rotated to bring the stop into proximity with the free end of the resilient biasing element.

Fig. 12 is a cross-sectional view of the handheld device of the present invention as viewed along line C-C of fig. 1 during clockwise rotation.

Fig. 13 is a cross-sectional view of the handheld device of the present invention as viewed along line C-C of fig. 1 during counterclockwise rotation.

[ description of main reference symbols ]

Hand-held device 100 housing 10

Half shell 11 mounting space 12

Handle 13 mounting part 14

Mounting hole 15 receiving hole 17

Battery 21 drives motor 22

First drive shaft 23 speed reduction device 24

Control circuit board 26 controls switch 27

Main board portion 32 of bracket 31

Extension 33 bearing seat 4

First base 42 of outer housing 41

First through hole 43 surrounds wall 44

The receiving space 46 of the limiting groove 45

Inner seat body 51 with outer matching surface 47

Second base 52 projection 53

Second through hole 54 spacer 55

Interior mating surface 56 projection 561

The mating groove 57 receives the groove 58

Connecting groove 59 locking element 6

First fitting portion 72 of output shaft 71

First extension 73 and second drive shaft 74

First fitting opening 75 and second fitting opening 76

Batch seat 77 annular adjustment part 8

First segment 81 and second segment 83

Stopper 84 resilient biasing element 91

Fixed part 911 limiting element 92

Adjusting space 93 collar 94

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

[ detailed description ] embodiments

Hereinafter, a specific embodiment of the handheld device 100 of the present invention will be described with reference to fig. 1 to 13. The utility model discloses hand-held device 100 has electronic and manual two kinds of modes. The hand-held device 100 is used for loading a batch head (not shown) to install and remove screws (not shown). Referring to fig. 9 to 13, a user can hold the handheld device 100 to rotate clockwise or counterclockwise, the clockwise being the X direction and the counterclockwise being the Y direction. The utility model discloses the direction of well definition all uses figure 1 as the standard, defines hand-held device 100's the position of handle portion 13 is in hand-held device 100's the ascending rear end of fore-and-aft direction has still defined with fore-and-aft direction vertically transverse direction and perpendicular to fore-and-aft direction and transverse direction's up-and-down direction respectively.

Referring to fig. 1 to 13, the present invention provides a handheld device 100, which includes a housing 10, a batch head (not shown) located in front of the housing 10, and a control switch 27 installed on the housing 10. The casing 10 is further provided with a control circuit board 26, a battery 21, a driving motor 22, a speed reducer 24 and a torque control device.

Referring to fig. 1 to 6, the housing 10 is assembled by a pair of two half shells 11 symmetrically disposed. Referring to fig. 7 and 8, an installation space 12 is formed in the housing 10. The housing 10 includes a handle portion 13 at a rear end and a mounting portion 14 at a front end. The mounting portion 14 is formed with a mounting hole 15 that communicates the mounting space 12 with the outside.

The battery 21, the driving motor 22, the reduction gear 24, and the torque control device are arranged in the installation space 12 in the front-rear direction in this order from the rear to the front. The front end of the driving motor 22 and the rear end of the speed reducer 24 are connected and driven by a first transmission shaft 23. The screwdriver head (not shown) and the front end of the speed reducer 24 are connected and driven by the torque control device. The torsion control device is partially arranged in the mounting hole 15 and partially arranged on the periphery of the mounting part 14.

Referring to fig. 3 to 13, the torque control device includes a bracket 31 driven by the front end of the reduction gear 24, a bearing seat 4 located in front of the bracket 31 and driven by the bracket 31, and an output shaft 71 located in front of the bearing seat 4 and driven by the bearing seat 4.

The bracket 31 includes a main plate portion 32 having a disk shape and three extending portions 33 projecting forward from a front end surface of the main plate portion 32. The three extending portions 33 are respectively evenly distributed on the front end surface of the main plate portion 32. The outer edge of the upper extension 33 is disposed flush with the outer edge of the main plate portion 32.

The bearing seat 4 includes an outer seat body 41 and an inner seat body 51 disposed in the outer seat body 41. The outer seat body 41 and the inner seat body 51 are both substantially annular structures. The outer housing 41 includes a first base 42 having a circular plate shape and a ring wall 44 extending backward from an edge of the first base 42. A first through hole 43 is provided at a central position of the first base 42. A receiving space 46 is formed between the first base 42 and the annular wall 44. The inner housing 51 is disposed in the accommodating space 46. The inner housing 51 is rotatable in the receiving space. The inner housing 51 includes a second base 52 having a circular plate shape. A protruding portion 53 protruding rearward and three partition portions 55 extending from an outer edge of the protruding portion 53 toward an outer edge of the second base portion 52 are provided at a central position of a rear surface of the second base portion 52. A second through hole 54 is formed through the center of the protruding portion 53. The first through hole 43 and the second through hole 54 are arranged in a front-to-back corresponding communication manner. Each of the spacers 55 has a plate-like "T" shape. The three spacers 55 uniformly divide the rear surface of the second base 52 into three identical regions. Three identical mating grooves 57 are formed between the three identical regions and the inner surface of the annular wall 44 of the outer housing 41. The three fitting grooves 57 respectively have an outer fitting surface 47 formed on the inner surface of the annular wall 44 and an inner fitting surface 56 formed on the outer edge of the projection 53. The outer matching surface 47 is a curved surface which is uniformly arranged. The inner mating face 56 is spaced apart from the outer mating face 47. The inner matching surface 56 gradually approaches the outer matching surface 47 from two ends to the middle position, and the middle position of the inner matching surface 56 extends towards the outer matching surface 47 to form a protruding part, that is, the distance between the protruding part and the outer matching surface 47 is smaller than the distance between two ends of the inner matching surface 56 and the outer matching surface 47.

Referring to fig. 9 to 13, the mating groove 57 defines two receiving grooves 58 and a connecting groove 59 connecting the two receiving grooves 58. Two receiving grooves 58 are formed at both ends of the fitting groove 57, and a protruding portion of the inner fitting surface 56 is formed in the connecting groove 59. The torque control device further includes a cylindrical locking element 6 disposed in the receiving groove 58. Two locking elements 6, for a total of six locking elements 6, are arranged in each of the mating grooves 57. Referring to fig. 9, two locking elements 6 located in the same matching groove 57 are divided into a first locking element 61 and a second locking element 62. The two locking elements 6 in the mating grooves 57 are respectively disposed in the two receiving grooves 58. The locking element 6 can be moved between the receiving groove 58 and the connecting groove 59. The locking element 6 has a diameter which is larger than the distance between the protrusion in the connecting groove 59 and the outer mating surface 47. Clamping points are respectively defined between the protruding part of the inner matching surface 56 and the end points of the two ends of the inner matching surface 56. When the locking element 6 is located at the retaining point, the outer edge of the locking element 6 is retained with the inner and outer engagement surfaces 56 and 47.

The three extending portions 33 of the holder 31 are inserted forward into the three coupling grooves 59, respectively. Two locking elements 6 located in the same said mating slot 57 are located outside the two sides of said extension 33. A clearance is provided between the extension 33 and both of the locking elements 6 to allow the extension 33 to move in the connecting groove 59.

The output shaft 71 passes through the second through hole 54 and the first through hole 43 from the rear to the front. The inner edge of the second through hole 54 has a polygonal structure. The output shaft 71 includes a first fitting portion 72 at a rear end and a first projecting portion 73 formed to extend forward from the first fitting portion 72. The outer edge surface of the first fitting portion 72 has a polygonal structure corresponding to the inner edge of the second through hole 54. So that the inner housing 51 drives the output shaft 71 to rotate. The first extension 73 is exposed forwardly of the front end of the bearing housing 4. The outer peripheral surface of the first extension 73 has a polygonal structure. A second transmission shaft 74 and a batch holder 77 are further provided between the output shaft 71 and the batch head (not shown). The second transmission shaft 74 includes a first engagement opening 75 and a second engagement opening 76 at the front and rear ends. The inner edges of the first and second engaging openings 75 and 76 of the second transmission shaft 74 are both polygonal. The first fitting port 75 is provided corresponding to an outer peripheral surface of the first extension 73 so that the output shaft 71 can drive the second transmission shaft 74 to rotate. The batch seat 77 is fixedly installed in the second matching port 76. The batch head (not shown) is mounted in the batch seat 77 such that the batch head (not shown) rotates with the output shaft 71.

The control circuit board 26 is connected to the control switch 27. The user can operate the control switch 27 to control the driving motor 22 to operate in forward or reverse direction via the control circuit board 26.

When the hand-held device 100 drives the batch head (not shown) through the electric mode, the driving motor 22 drives the bracket 31 to rotate through the speed reducing device 24. Referring to fig. 9, when the bracket 31 rotates clockwise, the extending portions 33 move along the clockwise direction X and respectively push against the first locking elements 61, and the first locking elements 61 push against the spacing portions 55 along the clockwise direction X, so that the inner seat 51 rotates along the clockwise direction X, and the bearing seat 4 is driven to rotate along the clockwise direction X. At this time, the second locking element 62 is located in the receiving groove 58 and cannot move into the connecting groove 59, so as not to be clamped between the inner matching surface 56 and the outer matching surface 47, and therefore, in the power mode, the outer seat body 41 cannot rotate. When the bracket 31 rotates counterclockwise, each of the extending portions 33 moves in the counterclockwise Y direction and respectively pushes against each of the second locking elements 62, and each of the second locking elements 62 pushes against each of the spacing portions 55 in the counterclockwise Y direction, so that the inner seat 51 rotates in the counterclockwise Y direction, and the bearing seat 4 is driven to rotate in the counterclockwise Y direction. At this time, the first locking element 61 is located in the receiving groove 58, and cannot move into the connecting groove 59, so as not to be clamped between the inner mating surface 56 and the outer mating surface 47. Therefore, in the power mode, the outer housing 41 does not rotate with the bracket 31 and the inner housing 51, and the outer housing 41 remains stationary.

Referring to fig. 1 to 13, the torque rotating device further includes an annular adjusting portion 8 sleeved outside the mounting portion 14. The annular adjustment portion 8 is rotationally fitted and rotatably positioned outside the mounting portion 14. The annular adjustment portion 8 includes a first segment 81 and a second segment 83 extending forward from the first segment 81. Two limiting blocks 84 are convexly arranged on the surface of the inner ring of the second section part 83.

The bearing housing 4 is rotatable within the mounting hole 15. A plurality of limiting grooves 45 formed in a concave manner are uniformly distributed on the outer surface of the annular wall 44 of the outer seat body 41 of the bearing seat 4. Each of the stopper grooves 45 is concavely formed into a curved surface. The mounting portion 14 is provided with two receiving holes 17 corresponding to the outer surface of the annular wall 44 of the outer seat body 41 and penetrating through the mounting portion 14. The surface of the mounting portion 14 is also provided with two resilient biasing elements 91. The resilient biasing element 91 is of arcuate sheet-like configuration. Two of the resilient biasing elements 91 are provided around the periphery of the mounting portion 14. The two elastic biasing elements 91 are each provided with a fixing portion 911 on the surface of the mounting portion 14 at one end, and are freely disposed at the other end corresponding to the outer sides of the two receiving holes 17. The hand-held device further includes a collar 94 that is disposed over the surface of the mounting portion 14. The collar 94 secures the securing portions of the two resilient biasing elements 91, thereby securing the two resilient biasing elements 91 to the surface of the mounting portion 14. A stop element 92 is arranged in each of the two receiving openings 17. Each of the limiting elements 92 is of a ball-type structure. One end of the limiting element 92 is exposed in the installation space 12 and is clamped in the limiting groove 45, and the other end is pressed by the elastic biasing element 91. An adjustment space 93 is formed between the inner circumferential surface of the second step portion 83 of the annular adjustment portion 8 and the surface of the mounting portion 14. The two resilient biasing members 91 are located in the accommodating space 93 and are resiliently deformed in the accommodating space 93. The two stoppers 84 of the second section 83 are respectively pressed against the outer surfaces of the two elastic biasing elements 91. The bearing housing 4 is entirely enclosed in the annular regulation portion 8 in the front-rear direction.

Referring to fig. 9 and 11, the annular adjusting portion 8 can adjust the pressing force of the elastic biasing element 91 against the limiting element 92. When the annular adjusting portion 8 is rotated to make the two limit blocks 84 respectively and correspondingly abut against one end of the two elastic biasing elements 91 (i.e. away from the limit element 92), the abutting force of the two elastic biasing elements 91 against the limit element 92 is smaller, and when the annular adjusting portion 8 is rotated to make the two limit blocks 84 respectively and gradually approach to the position correspondingly and correspondingly abutting against the freely arranged other end of the two elastic biasing elements 91 (i.e. away from the limit element 92), the abutting force of the two elastic biasing elements 91 against the limit element 92 is gradually increased.

Referring to fig. 10, when the hand-held device 100 uses the batch head (not shown) to install or remove a screw (not shown) through a manual mode, the annular adjusting portion 8 may pre-adjust a maximum torque applied to the screw (not shown) when the screw (not shown) is installed or removed by the hand-held device 100, and when an actual torque when the screw (not shown) is installed or removed is greater than the preset maximum torque, the torque control device may idle and remove the torque applied to the screw (not shown) to protect various mechanism components of the hand-held device 100.

When the hand-held device 100 uses the batch head (not shown) to install or remove the screw (not shown) in the manual mode, the user first rotates the annular adjusting portion 8 to preset a maximum torque, and at this time, the two elastic biasing elements 91 exert a predetermined resisting force on the position-limiting element 92. Then, the user holds the handle portion 13 to rotate the hand-held device 100.

When the actual torque force during the installation or removal of the screw (not shown) is smaller than the preset maximum torque force, the user rotates the handle portion 13 to make the installation portion 14 push the two limiting elements 92, and the two limiting elements 92 are clamped with the limiting grooves 45 of the outer seat 41 to drive the outer seat 41 to rotate. At this time, the outer seat body 41 rotates relative to the inner seat body 51, the outer fitting surface 47 of the outer seat body 41 drives the corresponding locking element 6 to move in the connecting groove 59 so that the outer periphery of the locking element 6 is located at the position of the clamping point, and the locking element 6 drives the inner seat body 51 to rotate along with the outer seat body 41, thereby driving the batch head (not shown) to rotate.

The process of the outer seat 41 driving the inner seat 51 to rotate will be described in detail: referring to fig. 12, when the outer seat body 41 rotates in the clockwise direction X, the outer mating surface 47 of the outer seat body 41 drives the second locking elements 62 to move into the connecting groove 59 in the direction X, so that the outer periphery of each second locking element 62 is located at the position of the retaining point K, and each first locking element 61 is always located in the receiving groove 58. The outer periphery of each of the second locking elements 62 is clamped to the outer matching surface 47 and the inner matching surface 56, so that each of the second locking elements 62 drives the inner base 51 to rotate along the X direction. Referring to fig. 13, when the outer seat body 41 rotates in the counterclockwise Y direction, the outer engagement surface 47 of the outer seat body 41 drives each first locking element 61 to move into the connection groove 59 in the Y direction, so that the outer periphery of each first locking element 61 is located at the position of the fastening point K, and each second locking element 62 is always located in the receiving groove 58. The outer periphery of each first locking element 61 is clamped to the outer matching surface 47 and the inner matching surface 56, so that each first locking element 61 drives the inner base 51 to rotate along the Y direction.

However, when the actual torque force when installing or removing the screw (not shown) is larger than the preset maximum torque force, as shown in fig. 10, that is, when the preset pressing force of the two elastic biasing elements 91 on the two limiting elements 92 is not enough to make each limiting element 92 be held in the limiting groove 45, each limiting element 92 is continuously separated from one limiting groove 45 in the direction opposite to the rotation direction of the handheld device 100 and enters the next limiting groove 45, so that the mounting portion 14 is idle relative to the outer base 41.

Compared with the prior art, the utility model discloses following beneficial effect has: since the annular adjusting portion 8 adjusts the position where the stop block 84 abuts against the elastic biasing element 91 through rotation to adjust the abutting force of the elastic biasing element 91 against the stop element 92, the preset maximum torque force of the screw at the bit (not shown) is adjusted, the structure is more miniaturized, and the handheld device 100 is further provided with the driving motor 22 and other components; furthermore, when the larger preset maximum torque force is adjusted, the length of the part of the elastic biasing element 91 between the limiting block 84 and the limiting element 92 is shorter, so that the position of the elastic biasing element 91 subjected to the low pressure is concentrated on the shorter part, thereby avoiding the elastic recession of the elastic biasing element 91 subjected to the larger low pressure as a whole, and having better reliability.

The above description is only a partial embodiment of the present invention, not all embodiments, and any equivalent changes that the technical solutions of the present invention take are covered by the claims of the present invention through reading the present invention.

Claims (10)

1. A hand-held device for loading batch head to rotate and install or remove screws, the hand-held device comprises a shell and a torsion control device, wherein an installation space is formed in the shell, the torsion control device is installed on the shell, the shell comprises a handle part and an installation part, and the hand-held device is characterized in that: the torsion control device comprises a bearing seat which is arranged in the installation part and rotates in the installation part, an output shaft driven by the bearing seat and an annular adjusting part which is sleeved outside the installation part, the bearing seat further comprises an outer seat body which is formed with an accommodation space and an inner seat body which is arranged in the accommodation space, the output shaft and the inner seat body are inserted to drive the screwdriver head to rotate along with the inner seat body, the outer seat body and the inner seat body are mutually driven to rotate by a locking element, a plurality of limiting grooves are formed on the surface of the outer seat body, an elastic biasing element which is fixedly held outside the installation part is arranged between the outer surface of the outer seat body and the inner ring surface of the annular adjusting part, a limiting element which is pressed by the elastic biasing element is arranged between the elastic biasing element and the outer surface of the outer seat body, when the handheld device rotates, the installation part drives the outer seat body to rotate through the limiting element, a limiting block which abuts against the elastic biasing element is arranged on the surface of the inner ring of the annular adjusting part, and the annular adjusting part rotates outside the installation part to adjust the position of the elastic biasing element which is abutted against the limiting block.

2. The handheld device of claim 1, wherein: the elastic biasing component with spacing component is two, the installation department is including running through two accommodation holes of installation department, two spacing component is located respectively in two accommodation holes, each elastic biasing component be the arc set up in the surface of installation department, each elastic biasing component's one end with the installation department holding, the other end is for pressing spacing component's free end, the stopper is two, two the stopper supports respectively presses two elastic biasing component.

3. The handheld device of claim 2, wherein: the handheld device further comprises a lantern ring sleeved on the surface of the mounting part, and the lantern ring fixes the fixing parts of the elastic biasing elements, so that the two elastic biasing elements are fixed on the surface of the mounting part.

4. The handheld device of claim 1, wherein: the outer seat body comprises a first base part and a ring wall extending from the edge of the first base part, the limit grooves are positioned on the outer surface of the ring wall, the inner seat body rotates in the accommodating space, the inner seat body comprises a second base part in a circular ring plate shape, a protruding part protruding from the center of the second base part and a plurality of spacing parts extending from the outer edge of the protruding part to the outer edge of the second base part, the spacing parts are uniformly divided into a plurality of identical matching grooves between the outer seat body and the inner seat body, each matching groove comprises an outer matching surface formed on the inner surface of the ring wall and an inner matching surface formed on the outer edge of the protruding part, the middle position of each inner matching surface extends towards the outer matching surface to form a protruding part, and the distance between the two ends of the inner matching surface and the outer matching surface is gradually reduced, two locking elements positioned at two ends of the matching groove are arranged in each matching groove, when the outer seat body rotates, the outer matching surface drives one of the two locking elements in each matching groove to move towards the protruding part so that the outer edge of the locking element clamps the outer matching surface and the inner matching surface, and therefore the inner seat body rotates along with the outer seat body in the same direction.

5. The handheld device of claim 4, wherein: the two locking elements in each matching groove are divided into a first locking element and a second locking element, the whole handheld device can rotate clockwise or anticlockwise, and when the handheld device rotates clockwise, the outer matching surface drives the second locking element to move clockwise so that the outer edge of the second locking element clamps the outer matching surface and the inner matching surface.

6. The handheld device of claim 5, wherein: when the handheld device rotates anticlockwise, the outer matching surface drives the first locking element to move anticlockwise so that the outer edge of the first locking element clamps the outer matching surface and the inner matching surface.

7. The handheld device of claim 4, wherein: the hand-held device further comprises a driving motor arranged in the mounting space, a battery for supplying power to the driving motor, and a speed reducer driven by the driving motor, the torsion control device also comprises a bracket driven by the speed reducing device to rotate, the bracket comprises a disc-shaped main plate part and a plurality of extension parts which are formed by protruding from the main plate part and are uniformly distributed, each extension part is correspondingly inserted into each matching groove, each extension part is positioned between two locking elements in the same matching groove, when the bracket is driven to rotate by the speed reducing device, each extension part moves in each matching groove along the rotating direction to push against one of two locking elements in the same matching groove, the pushed locking elements push the spacing parts to enable the inner base body to rotate along with the bracket in the same direction.

8. The handheld device of claim 7, wherein: when the support is driven to rotate by the speed reducer, the outer seat body is still relative to the inner seat body and the support.

9. The handheld device of claim 4, wherein: the middle position of first base is provided with the first through-hole that runs through first base, protruding portion central point puts and is provided with the second through-hole that runs through interior pedestal, the inner edge of second through-hole is polygonized structure, the output shaft includes first cooperation portion and certainly first inserted extension portion that first cooperation portion extended formation, the outer fringe of first cooperation portion for with the polygonized structure that the inner edge of second through-hole corresponds the setting, first cooperation portion insert join in marriage in second through-hole and first through-hole.

10. The handheld device of claim 9, wherein: the screwdriver is characterized in that a transmission shaft and a screwdriver seat fixedly held on the transmission shaft are further arranged between the output shaft and the screwdriver head, one end of the transmission shaft is inserted and matched with the first insertion part, the screwdriver seat is fixedly held at the other end of the transmission shaft, and the screwdriver head is mounted in the screwdriver seat.