阅读说明：本技术 一种顶杆定位螺丝刀头内置式偏心螺丝刀 (Eccentric screwdriver with built-in ejector rod positioning screwdriver head ) 是由 张凤英 于 2021-08-21 设计创作，主要内容包括：本发明公开了一种顶杆定位螺丝刀头内置式偏心螺丝刀,包括旋转座、旋转辊、顶杆、螺丝刀头、螺丝刀头套筒座和用于带动螺丝刀头转动的转动驱动机构；所述旋转辊上呈环状排列设置有螺丝刀头储藏室和螺丝刀头通道孔,所述螺丝刀头储藏室下端设置有顶杆和螺丝刀头二者中仅供顶杆通过的顶料孔；所述旋转座上端固设有螺丝刀头套筒座,所述旋转座上端设置有用于供螺丝刀头在旋转辊与螺丝刀头套筒座之间通过的第一通孔,所述旋转座下端设置有用于将螺丝刀头从旋转辊中顶入螺丝刀头套筒座内的顶杆。本发明能够在使螺丝刀本体和螺丝刀不分离的状态下完成更换螺丝刀头的工作,使螺丝刀头更换方便、高效,同时螺丝刀头不容易丢失。(The invention discloses a built-in eccentric screwdriver with a mandril positioning screwdriver bit, which comprises a rotating seat, a rotating roller, a mandril, a screwdriver bit sleeve seat and a rotation driving mechanism for driving the screwdriver bit to rotate, wherein the rotating seat is provided with a rotary shaft; the rotary roller is provided with a screwdriver head storage chamber and screwdriver head channel holes in an annular arrangement mode, and the lower end of the screwdriver head storage chamber is provided with a jacking hole through which only the jacking rod passes in the jacking rod and the screwdriver head; the screw driver head sleeve seat is fixedly arranged at the upper end of the rotary seat, a first through hole for the screw driver head to pass through between the rotary roller and the screw driver head sleeve seat is formed in the upper end of the rotary seat, and an ejector rod for ejecting the screw driver head into the screw driver head sleeve seat from the rotary roller is arranged at the lower end of the rotary seat. The screwdriver head replacing device can complete the work of replacing the screwdriver head under the condition that the screwdriver body and the screwdriver are not separated, so that the screwdriver head is convenient and efficient to replace, and meanwhile, the screwdriver head is not easy to lose.)

1. The utility model provides a built-in eccentric screwdriver of ejector pin set screw tool bit which characterized in that: the device comprises a rotating seat, a rotating roller, an ejector rod, a screwdriver head sleeve seat and a rotating driving mechanism for driving the screwdriver head to rotate;

at least two rotating rollers which rotate coaxially are arranged on the rotating seat;

the rotary roller is provided with a screwdriver head storage chamber and screwdriver head passage holes in an annular arrangement mode, the upper end of the screwdriver head storage chamber is provided with a screwdriver head inlet and a screwdriver head outlet through which a screwdriver head passes, the lower end of the screwdriver head storage chamber is provided with a jacking hole through which only a jacking rod passes in the jacking rod and the screwdriver head, and the screwdriver head storage chamber is internally provided with a screwdriver head;

the upper end of the rotating seat is fixedly provided with a screwdriver bit sleeve seat, the upper end of the rotating seat is provided with a first through hole for the screwdriver bit to pass between the rotating roller and the screwdriver bit sleeve seat, and the lower end of the rotating seat is provided with an ejector rod for ejecting the screwdriver bit into the screwdriver bit sleeve seat from the rotating roller;

and a rotation driving mechanism for driving the screwdriver head to rotate is arranged between the screwdriver head sleeve seat and the screwdriver head or between the ejector rod and the screwdriver head.

2. The eccentric screwdriver with built-in mandril positioning screwdriver head as claimed in claim 1, characterized in that: the rotating seat is coaxially provided with 3 rotating rollers.

3. The eccentric screwdriver with built-in mandril positioning screwdriver head as claimed in claim 1, characterized in that: the roating seat includes rotation axis, last spacing board and lower spacing board, it sets firmly in the rotation axis upper end to go up the spacing board, lower spacing board sets firmly at the rotation axis lower extreme, rotatory roller is located between last spacing board and the lower spacing board, be provided with the pivot hole on the rotatory roller, the rotation axis passes the pivot hole.

4. The eccentric screwdriver with built-in mandril positioning screwdriver head as claimed in claim 1, characterized in that: the rotating base comprises a rotating sleeve, an upper limiting plate and a lower limiting plate, the upper limiting plate is fixedly arranged at the upper end of the rotating sleeve, the lower limiting plate is fixedly arranged at the lower end of the rotating sleeve, the rotating roller is positioned between the upper limiting plate and the lower limiting plate, and the rotating sleeve is sleeved on the rotating roller.

5. The eccentric screwdriver with built-in mandril positioning screwdriver head as claimed in claim 1, characterized in that: the rotary driving mechanism is located between the screwdriver head and the screwdriver head sleeve seat, the rotary driving mechanism comprises a side limiting groove and a side limiting protrusion, the side limiting groove and the side limiting protrusion can only slide relatively back and forth and can be respectively arranged in an inner hole of the screwdriver head sleeve seat and on the side surface of the screwdriver head, and the side limiting protrusion is arranged in the side limiting groove.

6. The eccentric screwdriver with built-in mandril positioning screwdriver head as claimed in claim 1, characterized in that: the rotary driving mechanism is located between the screwdriver head and the ejector rod and comprises an end limiting groove and an end limiting protrusion, the end limiting groove and the end limiting protrusion are respectively arranged on the contact surface of the upper end of the ejector rod and the contact surface of the screwdriver head, and the end limiting protrusion is arranged in the end limiting groove.

7. The eccentric screwdriver with built-in mandril positioning screwdriver head as claimed in claim 6, characterized in that: the lower end of the ejector rod is in transmission connection with a rotating shaft of the driving motor.

8. The eccentric screwdriver with built-in driver bit of ejector pin set screw as claimed in any one of claims 1 to 7, wherein: a partition plate is arranged between the rotary rollers on the rotary base, and a second through hole opposite to the ejector rod is formed in the partition plate.

9. The eccentric screwdriver with built-in driver bit of ejector pin set screw as claimed in any one of claims 1 to 7, wherein: the screwdriver head lower extreme is provided with first spacing protruding, screwdriver head cover barrel seat upper end inside is provided with the spacing protruding second that is used for restricting spacing protruding to pass through.

Technical Field

The invention relates to the technical field of screwdrivers, in particular to the technical field of eccentric screwdrivers with built-in mandril positioning screwdriver heads.

Background

The screwdriver body and the screwdriver head of the traditional multi-head screwdriver are separated when being replaced, after the screwdriver head is used up, other screwdriver heads need to be replaced, the original screwdriver head needs to be extracted, then a new screwdriver head is replaced, meanwhile, the screwdriver head needing to be replaced is arranged in a box which is specially used for storing the screwdriver head, the taking and placing of the screwdriver head are troublesome, and sometimes during work emergency, the replaced screwdriver head is randomly placed and easily lost.

The invention patent with the patent number CN105082043A discloses an electric screwdriver with semi-automatic nail feeding, which stores screws through screw holes in a nail feeding device, drives a drill bit to rotate through a screwdriver main body, and ejects out the screws in the screw holes through the drill bit and screws the screws to rotate, and aims at solving the problem that when the screws are screwed by a screwdriver, the screws are too small and are inconvenient to fix; the effect that the problem was reached is when screwing up the screw through this nail feeding device, do not need the operator to fix the position of waiting to twist the screw with the hand in person, thereby the efficiency of work has been improved, after a screw is twisted on the work piece, only need to rotate the screw carousel, can make the new screw hole that is equipped with the screw aim at the drill bit, the technological effect of this patent does not reach and can make screwdriver body and screwdriver accomplish the change under the state that does not separate, it is convenient to make screwdriver head change, high efficiency, screwdriver head is difficult to lose simultaneously, a large amount of screwdriver heads can be stored to screwdriver inside simultaneously, and do not influence the normal use of screwdriver.

This patent only discloses the structure and the assembly characteristic that set up one deck screw carousel simultaneously, and when setting up multilayer screw carousel, how the screw carousel of going into the lower part through the upper portion of screw, conveniently gets simultaneously and puts each layer screw carousel, and the operation is not troublesome, does not disclose corresponding technical characteristic in this patent. Meanwhile, the patent document does not disclose the matching mode and the structural characteristics of each screw turntable on the premise of conveniently taking and placing the screws. When the screws are unscrewed from the workpiece, storage is not necessary, while if the screws are stored in the lower screw turnplate.

The model of drill bit is fixed among the technical scheme that this patent is disclosed, does not have corresponding technical characterstic about screwdriver head changes, can't satisfy the demand of different model screwdriver head's quick replacement, does not disclose corresponding technical characterstic yet.

The patent only sets up the screw hole for storing the screw on the screw carousel, does not disclose when setting up the multilayer screw carousel, and the problem of the screw business turn over in the lower floor screw carousel, how to screw on the work piece with the cooperation of drill bit on the screw on the lower floor screw carousel, and above-mentioned problem is not disclosed in this patent document.

The utility model with the patent number of CN2810909 discloses a combined screwdriver, which mainly aims at the technical problem that the traditional screwdriver bit is used for preventing the screwdriver bit from easily falling off from the jack, and the screwdriver bit is fixed by using the elasticity of the jack or a buckle, so that the problem of difficulty in inserting and pulling out the jack of the screwdriver is solved; the screwdriver head and the screwdriver body are required to be separated every time when the screwdriver is replaced, if a worker cannot vertically install the screwdriver which is changed, on the screwdriver body every time, the screwdriver head is easy to lose, and meanwhile, the screwdriver head is required to be taken down from the screwdriver body every time for replacement, the operation is troublesome,

disclosure of Invention

The invention aims to solve the problems in the prior art, provides an eccentric screwdriver with a built-in ejector rod positioning screwdriver head, solves the problem that the operation is troublesome when the screwdriver head needs to be replaced under the condition that a screwdriver body needs to be separated from the screwdriver head in the using process of the existing screwdriver, and simultaneously solves the problem that the screwdriver head is easy to lose due to the fact that the traditional screwdriver body needs to be separated from the screwdriver head.

1. In order to achieve the purpose, the invention provides an eccentric screwdriver with a built-in ejector rod positioning screwdriver head, which comprises a rotary seat, a rotary roller, an ejector rod, a screwdriver head sleeve seat and a rotation driving mechanism for driving the screwdriver head to rotate;

at least two rotating rollers which rotate coaxially are arranged on the rotating seat;

the rotary roller is provided with a screwdriver head storage chamber and screwdriver head passage holes in an annular arrangement mode, the upper end of the screwdriver head storage chamber is provided with a screwdriver head inlet and a screwdriver head outlet through which a screwdriver head passes, the lower end of the screwdriver head storage chamber is provided with a jacking hole through which only a jacking rod passes in the jacking rod and the screwdriver head, and the screwdriver head storage chamber is internally provided with a screwdriver head;

the upper end of the rotating seat is fixedly provided with a screwdriver bit sleeve seat, the upper end of the rotating seat is provided with a first through hole for the screwdriver bit to pass between the rotating roller and the screwdriver bit sleeve seat, and the lower end of the rotating seat is provided with an ejector rod for ejecting the screwdriver bit into the screwdriver bit sleeve seat from the rotating roller;

and a rotation driving mechanism for driving the screwdriver head to rotate is arranged between the screwdriver head sleeve seat and the screwdriver head or between the ejector rod and the screwdriver head.

Preferably, the rotating seat is coaxially provided with 3 rotating rollers.

Preferably, the rotating base comprises a rotating shaft, an upper limiting plate and a lower limiting plate, the upper limiting plate is fixedly arranged at the upper end of the rotating shaft, the lower limiting plate is fixedly arranged at the lower end of the rotating shaft, the rotating roller is positioned between the upper limiting plate and the lower limiting plate, a rotating shaft hole is formed in the rotating roller, and the rotating shaft penetrates through the rotating shaft hole.

Preferably, the rotating base comprises a rotating sleeve, an upper limiting plate and a lower limiting plate, the upper limiting plate is fixedly arranged at the upper end of the rotating sleeve, the lower limiting plate is fixedly arranged at the lower end of the rotating sleeve, the rotating roller is positioned between the upper limiting plate and the lower limiting plate, and the rotating sleeve is sleeved on the rotating roller.

Preferably, the rotary driving mechanism is located between the screwdriver head and the screwdriver head sleeve seat, the rotary driving mechanism comprises a side limiting groove and a side limiting protrusion, the side limiting groove and the side limiting protrusion can only slide back and forth relatively and are respectively arranged in an inner hole of the screwdriver head sleeve seat and on the side face of the screwdriver head, and the side limiting protrusion is arranged in the side limiting groove.

Preferably, the rotation driving mechanism is located between the screwdriver head and the ejector rod and comprises an end limiting groove and an end limiting protrusion, the end limiting groove and the end limiting protrusion are respectively arranged on the contact surface of the upper end of the ejector rod and the screwdriver head, and the end limiting protrusion is arranged in the end limiting groove.

Preferably, the device also comprises a driving motor, and the lower end of the ejector rod is in transmission connection with a rotating shaft of the driving motor.

Preferably, a partition plate is arranged between the rotary rollers on the rotary seat, and a second through hole opposite to the ejector rod is formed in the partition plate.

Preferably, the lower end of the screwdriver head is provided with a first limiting protrusion, and the inner part of the upper end of the screwdriver head sleeve seat is provided with a second limiting protrusion for limiting the limiting protrusion to pass through.

The invention has the beneficial effects that: according to the screwdriver, the screwdriver head is arranged inside the screwdriver body, so that the screwdriver head can be replaced under the condition that the screwdriver body and the screwdriver are not separated, the screwdriver head is convenient and efficient to replace, and meanwhile, the screwdriver head is not easy to lose; by arranging the plurality of rotating rollers, more screwdriver bits can be stored in the screwdriver, the normal use of the screwdriver is not influenced, and the screwdriver is convenient to use and flexible to apply; the screwdriver head and the screwdriver head sleeve seat are provided with structures for limiting the screwdriver head to completely slide out of the screwdriver head sleeve seat, so that the screwdriver head can be absolutely prevented from being lost.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings in which like reference characters refer to like features throughout and in which:

FIG. 1 is a front view of an eccentric screwdriver with a set screw head according to the present invention;

FIG. 2 is a top view of an eccentric screwdriver with a post rod set screwdriver bit built-in according to the present invention;

FIG. 3 is a schematic perspective view of an eccentric screwdriver with a built-in driver bit for a mandril positioning screwdriver according to the present invention;

FIG. 4 is an exploded view of the rotary base and rotary roller of an eccentric screwdriver with a set screw head according to the present invention;

FIG. 5 is a perspective view of the swivel;

FIG. 6 is an exploded view of a rotary base of an eccentric screwdriver with a set screw head according to the present invention;

FIG. 7 is a perspective view of a rotating roller;

FIG. 8 is a front view exploded schematic view of a rotating roller;

FIG. 9 is a rear perspective exploded view of the rotating roller;

fig. 10 is a perspective view of an eccentric screwdriver with a driving motor and a built-in mandril positioning screwdriver head according to the invention.

In the figure: 1-rotating seat, 101-rotating shaft, 102-upper limiting plate, 103-lower limiting plate, 104-rotating sleeve, 105-partition plate, 2-rotating roller, 21-screwdriver bit storage chamber, 22-screwdriver bit channel hole, 25-material ejecting hole, 26-rotating shaft hole, 3-ejector rod, 42-screwdriver bit sleeve seat, 6-screwdriver bit and 7-driving motor.

Detailed Description

First embodiment, referring to fig. 1 to 4 and fig. 7 to 9, the eccentric screwdriver with a built-in top rod positioning screwdriver bit of the present invention comprises a rotary base 1, a rotary roller 2, a top rod 3, a screwdriver bit 6, a screwdriver head sleeve base 42 and a rotation driving mechanism for driving the screwdriver bit 6 to rotate;

the rotating seat 1 is provided with at least two rotating rollers 2 which rotate coaxially;

the rotary roller 2 is provided with screwdriver bit storage chambers 21 and screwdriver bit passage holes 22 in a ring-shaped arrangement around the axis, the screwdriver bit storage chambers 21 are used for storing screwdriver bits 6, the more the number of the screwdriver bit storage chambers 21 is, the more the number of the screwdriver bits 6 can be stored is, the screwdriver bit passage holes 22 are used for enabling the screwdriver bits 6 to pass through the rotary roller 2, when the number of the screwdriver bit passage holes 22 is one, if the screwdriver bits 6 on other rotary rollers 2 need to pass through the rotary roller 2, a larger angle may need to be rotated to enable the screwdriver bit passage holes 22 to be opposite to the screwdriver bits 6 to be passed through, when the number of the screwdriver bit passage holes 22 is multiple, the screwdriver bit passage holes 22 can be aligned to the screwdriver bits 6 to be passed through only by rotating a small angle, 2 screwdriver bit passage holes 22 can be symmetrically arranged in the actual production process, a screwdriver bit storage chamber 21 is arranged at other positions, the upper end of the screwdriver bit storage chamber 21 is provided with an inlet and an outlet of a screwdriver bit 6 for the screwdriver bit 6 to pass through, the lower end of the screwdriver bit storage chamber 21 is provided with a jacking hole 25 for only the jacking rod 3 to pass through in the jacking rod 3 and the screwdriver bit 6, and the screwdriver bit 6 is arranged in the screwdriver bit storage chamber 21; the top rod 3 penetrates through the jacking hole 25 to eject the screwdriver head 6 from the inlet and outlet of the screwdriver head 6, and finally the screwdriver head 6 is ejected into the screwdriver head sleeve base 42, the screwdriver head 6 slides out of the head part of the screwdriver head 6 from the end part of the screwdriver head sleeve base 42, the screw is screwed through the screwdriver head 6, and after the screw is screwed, the screwdriver head 6 is brought into the screwdriver head storage chamber 21 from the action of gravity of the screwdriver head sleeve base 42 or the magnetic force on the top rod 3 by pulling the top rod 3 downwards. In order to conveniently identify different screwdriver bits 6, the type or shape marks of the screwdriver bits 6 can be arranged on the outer side of the screwdriver bit storage chamber 21, so that people can conveniently select different sizes and types of screwdriver bits 6 corresponding to screws with different sizes, and the rotating roller 2 can also be made of transparent materials; a see-through hole may be provided in the rotary roller 2 through which the screwdriver bit 6 provided in the screwdriver bit storage chamber 21 is viewed; because the types of the screwdriver heads 6 are more, the screwdriver head storage chamber 21 is used for storing the screwdriver heads 6 of different types so as to meet the assembling and disassembling requirements of screws of different types;

the upper end of the rotating seat 1 is fixedly provided with a screwdriver bit sleeve seat 42, the upper end of the rotating seat is provided with a first through hole for the screwdriver bit to pass between the rotating roller and the screwdriver bit sleeve seat, and the lower end of the rotating seat 1 is provided with an ejector rod 3 for ejecting the screwdriver bit 6 into the screwdriver bit sleeve seat 42 from the rotating roller 2;

a rotation driving mechanism for driving the screwdriver head 6 to rotate is arranged between the screwdriver head sleeve seat 42 and the screwdriver head 6 or between the ejector rod 3 and the screwdriver head 6, when the rotation driving mechanism is arranged between the screwdriver head sleeve seat 42 and the screwdriver head 6, the screwdriver head 6 is driven to rotate through the screwdriver head sleeve seat 42, and a screw is screwed through manually rotating the rotating seat 1 in the application process of the screwdriver; when the rotation driving mechanism is arranged between the ejector rod 3 and the screwdriver head 6, the ejector rod 3 drives the screwdriver head 6 to rotate, the screw is assembled and disassembled by manually rotating the ejector rod 3 in the application process of the screwdriver, and when the ejector rod 3 penetrates through the rotating roller 2, the rotating roller 2 is not rotatable.

In order to enable the ejector rod 3 to drive the screwdriver head 6 to pass through the rotating roller 2 to the screwdriver head sleeve seat 42 in a reciprocating mode, magnetic force can be arranged at the upper end of the ejector rod 3, and if no magnetic force is arranged, when the screwdriver head 6 needs to return to the rotating roller 2, the screwdriver can be inverted to use gravity.

As shown in fig. 1-4, 3 rotating rollers 2 are coaxially arranged on the rotating base 1, the larger the number of the rotating rollers 2, the larger the number of the screwdriver bits 6 that can be stored, but the longer the total length of the screwdriver, so the specific number of the rotating rollers 2 is selected according to the requirement.

As shown in fig. 4-6, the rotary base 1 includes a rotary shaft 101, an upper limiting plate 102 and a lower limiting plate 103, the upper limiting plate 102 is fixed on the upper end of the rotary shaft 101, the lower limiting plate 103 is fixed on the lower end of the rotary shaft 101, the rotary roller 2 is located between the upper limiting plate 102 and the lower limiting plate 103, the rotary roller 2 is provided with a rotary shaft hole 26, the rotary shaft 101 passes through the rotary shaft hole 26, the upper limiting plate 102 and the lower limiting plate 103 limit the vertical movement of the rotary roller 2, and the rotary roller 2 is limited in the front-back, left-right directions by the rotary shaft 101 passing through the rotary roller 2, so that the rotary roller 2 can only rotate on the rotary shaft 101, and the screwdriver bits 6 and the screwdriver bit passage hole 22 on different rotary rollers 2 are opposite to the screwdriver bit sleeve base 42 in turn.

The rotary driving mechanism is positioned between the screwdriver head 6 and the screwdriver head sleeve seat 42, the rotary driving mechanism comprises a side limiting groove and a side limiting bulge which can only slide relatively back and forth and are respectively arranged in the inner hole of the screwdriver head sleeve seat 42 and on the side surface of the screwdriver head 6, the side limiting bulge is arranged in the side limiting groove, the side limiting bulge can only slide back and forth in the side limiting groove and can not rotate, in the application process of the screwdriver, the rotary seat 1 is rotated to drive the screwdriver head sleeve seat 42 to rotate, the screwdriver head sleeve seat 42 drives the screwdriver head 6 to rotate, screws are screwed through the screwdriver head 6, in order to ensure that the side limiting groove and the side limiting bulge can only slide back and forth relatively to each other and can not rotate relatively, the cross section of the inner hole of the screwdriver head sleeve seat 42 can have various shapes, and can be hexagonal, quadrangular or elliptical, the cross section of the corresponding screwdriver head 6 is hexagonal, quadrangular or elliptical, and no matter what the cross section of the inner hole of the screwdriver head sleeve seat 42 and the cross section of the screwdriver head 6 are, the screwdriver head sleeve seat 42 can drive the screwdriver head 6 to rotate as long as the requirement that the cross section of the inner hole of the screwdriver head sleeve seat 42 and the cross section of the screwdriver head 6 can be met

Second embodiment, this embodiment is based on the above-mentioned embodiment, and is obtained by using the structure of the rotary base 1 in this embodiment instead of the rotary base 1 in the above-mentioned embodiment, as shown in fig. 4-6, the swivel base 1 of the present embodiment includes a swivel sleeve 104, an upper limiting plate 102 and a lower limiting plate 103, the upper limiting plate 102 is fixedly arranged at the upper end of the rotating sleeve 104, the lower limiting plate 103 is fixedly arranged at the lower end of the rotating sleeve 104, the rotating roller 2 is positioned between the upper limiting plate 102 and the lower limiting plate 103, the rotating sleeve 104 is sleeved on the rotating roller 2, the upper limiting plate 102 and the lower limiting plate 103 limit the rotating roller 2 to move up and down, meanwhile, the rotating roller 2 is limited through the rotating sleeve 104, so that the rotating roller 2 can only rotate in the rotating sleeve 104, and the rotating roller 2 rotates in the rotating sleeve 104, thereby achieving the purpose that the screwdriver heads 6 and the screwdriver head passage holes 22 on different rotating rollers 2 are opposite to the screwdriver head sleeve seat 42.

Third embodiment, this embodiment is based on the above embodiments, and is obtained by replacing the rotation driving mechanism in the above embodiments with the rotation driving mechanism in this embodiment, the rotation driving mechanism is located between the screwdriver bit 6 and the ejector rod 3, the rotation driving mechanism includes an end limiting groove and an end limiting protrusion, the end limiting groove and the end limiting protrusion are respectively arranged on the mutual contact surface of the upper end of the ejector rod 3 and the screwdriver bit 6, the end limiting protrusion is arranged in the end limiting groove, the end limiting protrusion can only slide back and forth in the end limiting groove and can not rotate, during the application process of the screwdriver, the screwdriver bit 6 is driven to rotate by rotating the ejector rod 3, the screw is rotated by the screwdriver bit 6, in order to enable the end limiting groove and the end limiting protrusion to only slide back and forth relatively and can not rotate relatively, the cross section of the end limiting groove can have various shapes, can be hexagon, quadrangle or oval, the protruding cross section of end spacing that corresponds is hexagon, quadrangle or oval, no matter what the protruding cross section of end spacing and end spacing recess cross sectional shape are, finally as long as can satisfy make ejector pin 3 drive screwdrivers blade 6 rotate can, certainly also can make ejector pin 3 relative roating seat 1 can not rotate, set up corresponding arch and recess in the hole that 3 male ejector pins insert on roating seat 1 and on ejector pin 3, restriction ejector pin 3 rotates on roating seat 1, can manually rotate roating seat 1 during the use and rotate, roating seat 1 rotates with 3 synchronous rotations of ejector pin, finally drive screwdrivers blade 6 through ejector pin 3 and rotate.

In a fourth embodiment, based on the third embodiment, a driving motor 7 may be further added, as shown in fig. 10, the lower end of the ejector rod 3 is in transmission connection with a rotating shaft of the driving motor 7, the driving motor 7 may be fixed by holding with a hand, the ejector rod 3 is driven to rotate by holding the motor, the screwdriver bit 6 is driven to rotate by the ejector rod 3, and the screw to be screwed is driven to rotate by the screwdriver bit 6; the driving motor 7 can be fixedly supported on the rotating base 1, gears are respectively arranged on the lower end of the ejector rod 3 and the rotating shaft of the driving motor 7, the driving motor 7 drives the ejector rod 3 to rotate through the mutual meshing transmission of the gears, the ejector rod 3 drives the screwdriver head 6 to rotate, and the screwdriver head 6 drives a screw to be screwed to rotate.

Fifth embodiment, this embodiment is based on the above-mentioned embodiments, as shown in fig. 4-6, a partition 105 is disposed between the rotating rollers 2 on the rotating base 1, a second through hole opposite to the ejector rod 3 is disposed on the partition 105, because a plurality of rotating rollers 2 are disposed, when a screwdriver bit 6 of a certain model is needed, the corresponding rotating rollers 2 need to be rotated independently, if there is no partition 105, the rotating rollers 2 can be driven by mutual friction, the rotating rollers 2 which do not need to be rotated need to be manually prevented from rotating, different rotating rollers 2 are separated by the partition 105, and meanwhile, a certain gap is reserved between the partition 105 and the rotating rollers 2, when a certain rotating roller 2 is rotated independently, the resistance is small, and the rotation is easier.

Sixth embodiment, this embodiment is based on the above-mentioned embodiments, the lower end of the screwdriver bit 6 is provided with the first limiting protrusion, the inside of the upper end of the screwdriver bit sleeve seat 42 is provided with the second limiting protrusion for limiting the passage of the limiting protrusion, and by providing the second limiting protrusion and the first limiting protrusion, the screwdriver bit 6 is extended from the upper end of the screwdriver bit sleeve seat 42, while the lower end is retained in the screwdriver bit sleeve seat 42, and cannot be easily and manually pulled out, so that the screwdriver bit 6 and the screwdriver body are thoroughly prevented from being separated, and the natural screwdriver bit 6 cannot be lost without separating

The working process of the invention is as follows:

in the working process of the eccentric screwdriver with the built-in mandril positioning screwdriver head, when the screwdriver is in a storage state, the screwdriver head passage holes 22 on all the rotating rollers 2 are opposite to the screwdriver head sleeve seat 42, the mandril 3 is inserted into the screwdriver head sleeve seat 42 and the screwdriver head passage holes 22, when a certain type of screwdriver head 6 is required to be used, the mandril 3 is firstly pulled out to enable the rotating rollers 2 to rotate freely, firstly, the required screwdriver head 6 is determined on which rotating roller 2, then, the rotating roller 2 is rotated to enable the required screwdriver head 6 on the rotating roller 2 to be aligned with the screwdriver head sleeve seat 42, then, the mandril 3 is inserted, the required screwdriver head 6 is ejected out from the screwdriver head storage chamber 21 to enter the screwdriver head sleeve seat 42 through the mandril 3, one end of a screw screwed by the screwdriver 6 extends out of the upper end of the screwdriver head sleeve seat 42, the screwdriver head 6 is driven to rotate by rotating the rotary seat 1 or the rotary ejector rod 3, the screw to be assembled and disassembled is screwed by the screwdriver head 6, after the screwdriver head 6 is used, the ejector rod 3 is pulled down by pulling, the screwdriver head 6 slides into the original screwdriver head storage chamber 21 by magnetic force on the ejector rod 3 or an inverted screwdriver by gravity, because only the screwdriver head storage chamber 21 lacking the screwdriver head 6 is opposite to the ejector rod 3, the ejector rod 3 can be plugged in and pulled out by the screwdriver head storage chamber 21 on the rotary roller 2 and the screwdriver head channel holes 22 on other rotary rollers 2, because the screwdriver head 6 can freely pass through the screwdriver head channel holes 22, but the screwdriver head 6 can not pass through the jacking holes 25 at the lower ends of the rotary rollers 2, the screwdriver head 6 can only stop at the screwdriver head 21 of the rotary roller 2 finally, and after multiple times of use, the screwdriver bit storeroom 21 where each screwdriver bit 6 is located cannot be changed, when the first limiting protrusion is arranged at the lower end of the screwdriver bit 6, the second limiting protrusion used for limiting the limiting protrusion to pass through is arranged inside the upper end of the screwdriver bit sleeve seat 42, the second limiting protrusion and the first limiting protrusion are arranged, the screwdriver bit 6 extends out of the upper end of the screwdriver bit sleeve seat 42, meanwhile, the lower end of the screwdriver bit sleeve seat 42 is reserved in the lower end, the screwdriver bit sleeve seat cannot be easily pulled out, the screwdriver bit 6 and the screwdriver body are thoroughly prevented from being separated, and the natural screwdriver bit 6 cannot be lost.

According to the eccentric screwdriver with the built-in mandril positioning screwdriver head, the screwdriver head 6 is arranged in the screwdriver body, so that the work of replacing the screwdriver head 6 can be completed under the condition that the screwdriver body and the screwdriver are not separated, the screwdriver head 6 is convenient and efficient to replace, and meanwhile, the screwdriver head 6 is not easy to lose; by arranging the plurality of rotating rollers 2, more screwdriver bits 6 can be stored in the screwdriver, the normal use of the screwdriver is not influenced, and the screwdriver is convenient to use and flexible to apply; the screwdriver head 6 can be absolutely prevented from being lost by arranging the structure for limiting the screwdriver head 6 to completely slide out of the screwdriver head sleeve seat 42 on the screwdriver head 6 and the screwdriver head sleeve seat 42, when the structure for limiting the screwdriver head 6 to completely slide out of the screwdriver head sleeve seat 42 is not arranged, the screwdriver head 6 does not need to be pulled out of the screwdriver head sleeve seat 42 during use of the screwdriver, and the intentional loss of the screwdriver head 6 cannot be avoided if the screwdriver head 6 is intentionally pulled out manually; as long as the user of the screwdriver normally uses and operates, the screwdriver head 6 is not pulled out of the screwdriver head sleeve seat 42, the screwdriver head 6 can be basically prevented from being lost, the driving motor 7 is arranged at the upper end of the rotating seat 1, the screwdriver can be manually operated and electrically operated, and the adaptability is high.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.