CN102233552A

CN102233552A - Screw driver capable of automatically exchanging head

Info

Publication number: CN102233552A
Application number: CN2010101681914A
Authority: CN
Inventors: 温昊
Original assignee: Shanghai Kunjie Hardware Tool Co Ltd
Current assignee: Shanghai Kunjie Hardware Tool Co Ltd
Priority date: 2010-05-06
Filing date: 2010-05-06
Publication date: 2011-11-09

Abstract

The invention provides a screw driver capable of automatically exchanging a head. The screw driver comprises an outer sleeve, an inner sleeve, a shaft lever, a guide rod seat, a plurality of lead rod assemblies and a bit guide cylinder. The inner sleeve is connected with the outer sleeve in a sliding manner. The shaft lever is arranged in the outer sleeve and the inner sleeve, connected and fixed with the outer sleeve and used for forward pushing or backward pulling a bit; the shaft lever is provided with a slope surface; and the front end of the shaft lever is provided with a shaft lever guide magnet. The guide rod seat is embedded between the inner sleeve and the shaft lever and is connected and fixed with the rear end of the inner sleeve. The plurality of lead rod assemblies are connected with the periphery of the guide rod seat respectively and are connected with the guide rod seat in a rotatable manner; and a protruded arc surface is formed on each lead rod assembly corresponding to the slope surface. The invention has the advantages that: the screw driver is easy to operate and is convenient to carry.

Description

Automatic head-changing screwdriver

Technical Field

The invention relates to a hand tool, in particular to a screwdriver with an automatic head changing function.

Background

Screwdrivers (i.e., screwdrivers used in daily life) are widely used for disassembling and assembling various workpieces, and in order to facilitate the disassembling and assembling of workpieces with different sizes, many combined screwdrivers have appeared, and the combined screwdrivers can be roughly divided into two types:

one is that the screwdriver head and the screwdriver rod or the screwdriver rod and the handle are detachably connected, the screwdriver head or the screwdriver rod and the handle are separately stored, and different screwdrivers are formed by replacing the screwdriver head or the screwdriver rod. The screwdriver is wide in application range and high in practicability, but the screwdriver heads or screwdriver rods required to be replaced need to be stored in a specific place, so that a large space is occupied, the screwdriver is inconvenient to carry and use, and the replaced screwdriver heads or screwdriver rods are easy to lose if not properly stored.

The second category is screwdrivers with additional storage attached to the screwdriver itself, with the screwdriver being mechanically or otherwise configured to change bits or rods to create different screwdrivers. The screwdriver occupies a small space and is convenient to carry, the replaced screwdriver heads or screwdriver rods are not easy to lose, but the internal structure of the screwdriver is often complicated due to the fact that a plurality of screwdriver heads or screwdriver rods are stored together, and the screwdriver heads or screwdriver rods are inconvenient to replace.

For example, the invention patent of Chinese patent No. 200910049964.4 discloses a combined integrated screwdriver. Please refer to fig. 1, which is a structural diagram of an embodiment of the combined integrated screwdriver. The screwdriver body is assembled by a round plastic handle 25, a hexagonal metal loop bar 24, a metal chuck 23 and a plastic protective sleeve 22 for protecting the screwdriver head 21. The screwdriver chuck 23 is magnetic, the tool holder is hollow and adopts a uniform processing size, and the tool bits 21 in different forms are combined into a whole in a stacking mode and stored in the sleeve rod 24 of the screwdriver body.

When the screwdriver bits 21 are replaced, the arrangement order of the screwdriver bits 21 can be adjusted without pulling out the chuck 23 or disassembling the screwdriver (the chuck 23 combines the sleeve rod 24 and the sleeve handle 25 into a whole, and does not need to be disassembled under normal conditions). The front end part of the bit 21 is clamped by hand, the built-in bit 21 is directly taken out of the screwdriver by overcoming the friction and magnetic attraction of the chuck 23, then the required working bit is selected, the bit is placed at the forefront, other bits are stacked behind the bit at one time, and the bit is inserted into the screwdriver again through the chuck 23.

The combined type integrated screwdriver overcomes the defect that the blade and the tool bit of a common combined type screwdriver need to be stored respectively, effectively reduces the whole volume of the screwdriver, and can deal with screws of different types only by replacing the sequence of the built-in tool bit. However, it is also inconvenient to replace the bit 21 because the bit is stored telescopically in the pocket bar 24. For example, when the tool bit to be used is located at the position behind the loop bar 24, the tool bit to be used can be adjusted to the foremost end after the tool bits at the front end are pulled out, the operation is complex, and the working efficiency is seriously influenced.

In conclusion, the conventional combined screwdriver generally has the problem that the screwdriver head is inconvenient to replace.

Disclosure of Invention

The invention aims to provide a screwdriver with an automatic head replacement function, and the screwdriver is used for solving the problem that the head of the existing combined screwdriver is inconvenient to replace.

The invention provides an automatic head-changing screwdriver which comprises an outer sleeve, an inner sleeve, a shaft rod, a guide rod seat, a plurality of guide rod assemblies and a screwdriver head guide cylinder. The inner sleeve is connected with the outer sleeve in a sliding way. The axostylus axostyle sets up in overcoat and endotheca to be connected fixedly with the overcoat for push away before or draw the batch head after, and be provided with domatic on the axostylus axostyle, the axostylus axostyle front end is provided with draws axostylus axostyle magnet. The guide rod seat is embedded between the inner sleeve and the shaft rod and is fixedly connected with the rear end of the inner sleeve. The guide rod assemblies are connected to the periphery of the guide rod seat respectively and are rotatably connected with the guide rod seat, and a convex cambered surface is arranged on each guide rod assembly corresponding to the slope surface. The batch head guide cylinder is arranged at the front end of the inner sleeve. Wherein,

each guide rod assembly further comprises a guide rod, a suction element, a batch head and an elastic element. The suction element is arranged at the front end of the guide rod, and the batch head is adsorbed on the suction element. The elastic element is arranged at the rear end of the guide rod and is fixedly connected with the guide rod seat. And a convex supporting point is arranged at the middle position on the guide rod and used for enabling the guide rod component to rotate.

According to the automatic screwdriver with the replaceable screwdriver head, the outer portion of the inner sleeve is provided with the plurality of convex ribs, the inner portion of the outer sleeve is correspondingly provided with the plurality of grooves, and one convex rib is clamped and embedded into one groove and used for positioning when a screwdriver head is replaced.

According to the automatic screwdriver with replaceable bits in the preferred embodiment of the invention, the inner space of the inner sleeve is provided with a plurality of limiting positions, only one guide rod assembly can be allowed to move in each limiting position, and the limiting positions are the same as the number of the bits and are used as the moving space of the bits when the bits are replaced.

According to the screwdriver with the automatic screwdriver head changing function, the blocking piece is arranged inside the inner sleeve and is arranged in the middle of the inner sleeve and used for blocking the movement of the screwdriver head and separating the screwdriver head from the shaft rod.

The screwdriver with the automatic head changing function according to the preferred embodiment of the invention further comprises guide posts, wherein the guide posts are arranged in the outer sleeve and the inner sleeve, one end of each guide post is fixedly connected to the rear end of the outer sleeve, and the other end of each guide post is inserted into the shaft rod for mutually fixing the shaft rod and the outer sleeve.

According to the screwdriver with the automatic head changing function of the preferred embodiment of the invention, the attraction element is a strong magnet.

According to the screwdriver with the automatic head changing function of the preferred embodiment of the invention, the elastic element is a return spring, and the spring is in a compressed state.

Compared with the prior art, the invention has the beneficial effects that:

1. the automatic screwdriver with the replaceable screwdriver head can finish the replacement of screwdriver heads by sliding and rotating the inner sleeve and the outer sleeve, and has the advantages of simple operation, convenient use and strong practicability.

2. The automatic screwdriver with the replaceable screwdriver head can store a plurality of screwdriver heads inside, is compact in internal structure, small in occupied space and convenient to carry, and can effectively avoid the situation that the screwdriver heads are not stored properly and lost compared with the existing screwdriver head separated storage mode.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

FIG. 1 is a structural view of an embodiment of a combined integrated screwdriver disclosed in the invention of Chinese patent No. 200910049964.4;

FIG. 2 is a general view of an embodiment of the automatic head-changing screwdriver of the present invention;

FIG. 3 is an exploded view of one embodiment of the automatic bit changing screwdriver of the present invention;

FIG. 4 is a schematic view of an embodiment of a shaft of the present invention;

FIG. 5 is a schematic view of an assembled shaft and guide post of the present invention;

FIG. 6 is a schematic view of one embodiment of a guide rod of the present invention;

FIG. 7 is a schematic view of an assembled shaft rod, guide post, guide rod seat and guide rod assembly of the present invention

FIG. 8 is an overall view of the inner sleeve of the present invention;

FIG. 9 is a front view of the inner sleeve of the present invention;

FIG. 10 is a cross-sectional view taken at location B-B of FIG. 9;

FIG. 11 is a cross-sectional view of FIG. 9;

FIG. 12 is an overall view of the outer cover of the present invention;

FIG. 13 is a side view of the outer cover of the present invention;

FIG. 14 is a schematic diagram of a first state of replacing a batch head according to the present invention;

FIG. 15 is a diagram illustrating a second state of replacing a batch head according to the present invention;

FIG. 16 is a schematic diagram of a third state of replacing the batch head according to the present invention;

FIG. 17 is a diagram illustrating a fourth state of replacing the batch head according to the present invention;

FIG. 18 is a diagram illustrating a fifth state of replacing the batch head according to the present invention.

Detailed Description

Referring to fig. 2 and 3, fig. 2 is an overall view of an embodiment of the screwdriver with the automatic head changing function according to the present invention, and fig. 3 is an exploded view of the screwdriver with the automatic head changing function according to the present invention. The automatic head-changing screwdriver comprises an outer sleeve 2, a guide post 4, a shaft rod 5, a guide rod seat 7, a plurality of guide rod components, an inner sleeve 15 and a screwdriver head guide barrel 16. The rear end of the guide post 4 is fixed in the outer sleeve 2 through the guide post fixing screw 1, and the front end of the guide post is inserted into the shaft lever 5, so that the shaft lever 5 and the outer sleeve 2 are fixed in a linkage manner. The front end of the shaft lever 5 is provided with a leading shaft lever magnet 6 for adsorbing the batch head. The guide rod seat 7 is clamped between the inner sleeve 2 and the shaft lever 5 and is fixedly connected with the rear end of the inner sleeve 2. The rear end of the inner sleeve 15 extends into the outer sleeve 2 and is slidably connected with the outer sleeve 2. The batch head guide 16 covers the front end of the inner sleeve 15.

Wherein each guide rod component is composed of a guide rod 11, a suction element, a batch head 13 and an elastic element. The suction element is arranged at the front end of the guide rod 11 and used for adsorbing the batch head 13, and the suction element in the embodiment is a strong magnet 12. The elastic element is arranged at the rear end of the guide rod 11 and is fixedly connected with the guide rod seat 7, and the elastic element in the embodiment is a return spring 10.

To facilitate a further understanding of the invention, a schematic of several key elements will now be presented to illustrate the invention. Referring to fig. 4, which is a schematic view of an embodiment of the shaft rod of the present invention, an axial groove 501 is formed on the shaft rod 5, a slope 502 is formed at the front end of the groove 501, and the groove 501 and the slope 502 together form a track for the guide rod 11 to slide. The shaft 5 is further provided with two positioning holes 503 for connecting with the guide posts 4.

Referring to fig. 5, which is a schematic view of an embodiment of the assembled shaft lever and guide post, the guide post 4 is correspondingly provided with two positioning holes 403, so that the shaft lever 5 can be fixedly connected with the guide post 4 by the positioning pin 3 after being inserted into the guide post. The rear end of the guide post 4 is provided with two convex clamping pieces 402 and a screw hole 401 which is clamped at the rear end of the outer sleeve 2 and fixes the guide post 4 and the outer sleeve 2 through a guide post fixing screw 1.

Referring to fig. 6, which is a schematic view of an embodiment of the guide rod of the present invention, a batch head groove 111 is formed at a front end of the guide rod 11, and the batch head groove 111 is used for mounting the strong magnet 12 and adsorbing the batch head 13. The guide rod 11 is further provided with a convex arc surface 112 for sinking into the groove 501 and the slope 502 of the shaft 5 to realize sliding between the guide rod 11 and the shaft 5. The guide rod 11 is provided at a rear end thereof with a spring hole 114 for mounting the return spring 10. A protruding supporting point 113 is provided at the middle rear position of the guide rod 11 for being snap-fitted into the guide rod seat 7, and the guide rod 11 can rotate with the supporting point 113 as a fulcrum.

Please refer to fig. 7, which is a schematic diagram of an embodiment of the assembled shaft rod, guide post, guide rod seat and guide rod assembly. The shaft 5 and the guide post 4 extend through the guide rod seat 7 and are slidable in the guide rod seat 7. The rear end of the guide rod seat 7 is provided with a positioning component consisting of a steel ball 8 and a spring 9, so that the guide column 4 is more stable when sliding in the guide rod seat 7. Six slots 701 are formed in the guide rod base 7 for mounting six guide rod assemblies. The front ends of the six guide rod assemblies are respectively adsorbed with the batch heads 13 through a strong magnet 12, and the supporting points 113 of the six guide rod assemblies are respectively connected in the six slotted holes 701 in a clamping and embedding manner and are matched with the return springs 10 arranged at the rear ends to rotate in the slotted holes 701. Six guide rod assemblies are installed in the embodiment, however, this is only a good embodiment, and the number of the guide rod assemblies can be designed according to actual needs, and there is no limitation in the present application.

Please refer to fig. 8 and 9, which are an overall view and a front view of the inner sleeve of the present invention, respectively. The rear end of the inner sleeve 15 is provided with a positioning hole 151 for connecting and fixing the guide bar base 7 by the inner sleeve positioning screw 14. The inner sleeve 15 is provided with a plurality of ribs 152 for positioning when replacing the bit 13.

The inner space of the inner sleeve 15 is provided with a limit bin for guiding the movement of the rod assembly. Referring to fig. 10 and 11, fig. 10 is a cross-sectional view taken at a position B-B in fig. 9, and fig. 11 is a cross-sectional view of fig. 9. Referring first to fig. 10, six limit positions 153 are provided in the inner space of the position for the guide rod assembly to move, and the corresponding guide rod assembly can only move in the corresponding limit positions 153. Referring to fig. 11, a stopper 154 is provided inside the inner sleeve 15, and the stopper 154 is located at a middle position of the inner sleeve 15 to stop the movement of the bit 13 and separate the bit 13 from the shaft 5 when the bit 13 is replaced.

See fig. 12 and 13 for an overall and side view of the outer cover, respectively. A plurality of grooves 201 are arranged in the outer sleeve 2 and are used for clamping and embedding the convex ribs 152 on the inner sleeve 15, so that the positioning when the batch head 13 is replaced is realized. If the six bits 13 are compared with six shift positions, the shift can be realized by different ribs 152 being engaged in different grooves 201, i.e. if there are six guide rod assemblies, there are necessarily at least six pairs of ribs 152 and grooves 201.

The process of replacing the batch head 13 is described in detail below with reference to five state diagrams:

state 1, please see fig. 14:

in this state, the inner sleeve 15 and the outer sleeve 2 are axially integrated and cannot rotate relative to each other. The bit 13 is used to extend from the bit guide 16 and is held by the shaft 5 from behind so that the screwdriver can screw the work object.

State 2, see fig. 15:

when the bit 13 needs to be replaced, the outer sleeve 2 moves to the right, and the guide post 4 and the shaft 5 are driven to move together to the right, and the cambered surface 112 protruding from the guide rod 11 slides in the groove 501 of the shaft 5. Since the leading end of the shaft 5 is provided with the leading bar magnet 6, the protruding bit 13 is attracted together with the leading bar magnet and moved rightward. When the rear end of the bit 13 hits the stop 154, the bit 13 cannot move further to the right due to the blocking action of the stop 154. At this time, the arc surface 112 of the guide rod 11 just slides to the position of the slope 502 of the shaft 5, and the strong magnet 12 at the front end of the guide rod 11 just attracts the batch head 13.

State 3, please see fig. 16:

when the shaft 5 moves further to the right, the bit 13 is separated from the front end of the shaft 5. And the cambered surface 112 of the guide rod 11 slides on the slope surface 502 of the shaft rod 5, so that the shaft rod 5 is lifted upwards, and the batch head 13 is lifted together by the strong magnet 12 at the front end of the guide rod 11. In this state, the inner sleeve 15 and the outer sleeve 2 can rotate relatively, so that the required bit 13 can be replaced. When the desired batch 13 is selected, the jacket 2 can be moved to the left.

State 4, see fig. 17:

during the left movement of the sheath 2, the guide rod 11 will rotate downwards with the bit 13, as the cambered surface 112 of the guide rod 11 slides down gradually from the slope 502 of the shaft 5, and by the action of the return spring 10 at the rear end of the guide rod 11.

State 5, see fig. 18:

when the cambered surface 112 of the guide rod 11 just slides into the groove 501 of the shaft rod 5, the batch head 13 just descends to the middle position of the inner sleeve 15, the front end of the shaft rod 5 just abuts against the rear end of the batch head 13, and the batch head 13 is always led out of the batch head guide cylinder 16 until the position of the state 1, so that the replacement of the batch head 13 is completed.

In the whole replacing process, the screwdriver with the automatic head replacing function can complete the replacement of the screwdriver head only by sliding and rotating the inner sleeve and the outer sleeve, and is simple and flexible to operate and extremely convenient to use.

The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims

1. The utility model provides an automatic trade head screwdriver which characterized in that includes: an outer sleeve, an inner sleeve, a shaft lever, a guide lever seat, a plurality of guide lever components and a batch head guide cylinder, wherein the inner sleeve is connected with the outer sleeve in a sliding way, the shaft lever is arranged in the outer sleeve and the inner sleeve and is fixedly connected with the outer sleeve for pushing or pulling a batch head forwards, a slope surface is arranged on the shaft lever, a guide lever magnet is arranged at the front end of the shaft lever, the guide lever seat is embedded between the inner sleeve and the shaft lever and is fixedly connected with the rear end of the inner sleeve, the plurality of guide lever components are respectively connected with the periphery of the guide lever seat and are rotatably connected with the guide lever seat, a convex cambered surface is arranged on each guide lever component corresponding to the slope surface, the batch head guide cylinder is arranged at the front end of the inner sleeve,

each guide rod component further comprises a guide rod, a suction element, a batch head and an elastic element, wherein the suction element is arranged at the front end of the guide rod, the batch head is adsorbed on the suction element, the elastic element is arranged at the rear end of the guide rod and is fixedly connected with the guide rod seat, and a convex supporting point is arranged at the middle position on the guide rod and is used for enabling the guide rod component to rotate.

2. The screwdriver as claimed in claim 1, wherein the inner sleeve has a plurality of ribs formed on the outer surface thereof, the outer sleeve has a plurality of corresponding grooves formed on the inner surface thereof, and one rib is engaged with one of the grooves for positioning when replacing the bits.

3. The screwdriver as claimed in claim 1, wherein the inner space of the inner sleeve is provided with a plurality of limiting positions, and only one of the guiding rod assemblies is allowed to move in each of the limiting positions, the number of the limiting positions is the same as the number of the bits, and the limiting positions are used as a moving space for the bits when the bits are replaced.

4. The screwdriver as recited in claim 1, wherein a blocking member is disposed inside the inner sleeve and at a middle position of the inner sleeve for blocking the movement of the screwdriver bits and separating the screwdriver bits from the shaft.

5. The screwdriver as recited in claim 1, further comprising a guide post disposed in said outer sleeve and said inner sleeve, one end of said guide post being connected and fixed to a rear end of said outer sleeve, and the other end of said guide post being inserted into said shaft for fixing said shaft and said outer sleeve to each other.

6. The driver with automatic screwdriver of claim 1, wherein said suction element is a strong magnet.

7. The screwdriver as recited in claim 1, wherein said resilient element is a return spring and said spring is under compression.