JP6399649B2 - screwdriver - Google Patents

Description

  The present invention relates to a screwdriver for tightening or loosening a screw or bolt.

  Conventionally, various functions have been proposed by adding various functions to a screwdriver to enhance convenience. For example, the illuminated tool disclosed in Patent Document 1 has a light emitting grip to which an LED lamp is attached to a grip portion, and an insertion hole is formed at the tip of the light emitting grip. A plurality of translucent insertion portions are prepared as members that can be inserted into the insertion holes. As the translucent insertion portion, there are disclosed ones that are injection-molded integrally with a minus or cross-shaped metal and used for screwdriver, and those that have a through hole into which a pencil or a ballpoint pen can be inserted.

Utility Model Registration No. 3105660

  In the use of the lighting tool disclosed in Patent Document 1, for example, in the case where it is desired to write with a pencil after completing the fastening of the cross-shaped Phillips screwdriver, a member that is used as a light-transmitting insertion portion related to the cross-shaped Phillips screwdriver Is removed from the insertion hole of the light emitting grip, and a member to be a light projecting insertion portion provided with a pencil must be inserted into the insertion hole of the light emitting grip and attached, which is complicated. In addition, it is necessary to consider the storage and management of the members that are the plurality of translucent insertion portions. Even when the lighting tool is carried, the screwdrivers and writing tools that are used as a plurality of translucent insertion portions are carried separately, which is complicated.

  Accordingly, an object of the present invention is to provide a screwdriver that can smoothly switch between the screwing operation and other operations such as writing, and is excellent in portability.

In order to solve the above problems, according to the first invention of the present invention,
A grip portion and a body shaft;
The main body shaft has a hollow rod shape, has a fitting portion fitted to a screw head at a tip portion, a rear end portion is fixed to the grip portion, and is formed so that a rod-like object can be extended and submerged therein. Provided with a rod projecting mechanism, a core projecting portion for projecting the rod-shaped object fed by the rod-shaped object feeding mechanism,
The grip portion includes a movable portion that partially protrudes from a rear end of the grip portion and that enables the rod-like object feeding mechanism to be operated.

According to the second invention of the present invention, in addition to the features of the first invention,
The main body shaft is formed by a first main body shaft fixed to the grip portion and a second main body shaft that is detachably formed on the first main body shaft and provided with the fitting portion. A screwdriver characterized by the following can be obtained.

According to the third aspect of the present invention, in addition to the features of the first or second aspect,
A screwdriver characterized in that the core protrusion is provided at the tip of the fitting portion.

According to a fourth aspect of the present invention, in addition to the characteristics of any one of the first to third aspects,
A step portion formed inside the main body shaft and in contact with a front end portion of the rod-shaped object feeding mechanism;
A rear support member screwed into a rear end portion of the main body shaft and in contact with a rear end portion of the rod-shaped object feeding mechanism;
A screwdriver characterized by having

According to a fifth aspect of the present invention, in addition to the characteristics of any one of the first to fourth aspects,
The rod-shaped object is a lead for a mechanical pencil,
The bar-like object feeding mechanism has a screw release means for holding or releasing the mechanical pencil lead.

  The present invention has the following effects. That is, according to the first invention of the present invention, a screwdriver having a main body shaft in which a fitting portion fitted to a screw head and a rod-like object feeding mechanism capable of feeding a rod-like object are integrated is obtained. be able to. For example, the fitting portion can be a minus or plus screw-turning tip, and the rod-like object can be a writing instrument such as a pencil or a ballpoint pen, or a marking tool. Accordingly, it is possible to smoothly switch between writing and marking work while performing the screwing operation without performing the attaching / detaching operation of the tip member and the writing tool of the screwdriver. Furthermore, since it is not necessary to carry and store the tool used for the screw tightening operation and the writing instrument separately, the portability can be improved.

  Further, according to the second aspect of the present invention, the second main body shaft provided with the fitting portion to be fitted to the screw head is a main body shaft that is detachably formed on the first main body shaft. If the second body shaft provided with fitting parts corresponding to screws, bolts, etc., such as minus, plus, or hexagon, is prepared, the screwdriver of the present invention can be used for various screws. Can do.

  Further, according to the third aspect of the present invention, the rod-like object can be projected from the tip of the fitting portion, so that the switching between the screw tightening operation and the writing operation can be performed more smoothly. it can.

  According to the fourth aspect of the present invention, the rod-like object feeding mechanism is pressed by contacting the front side with the stepped portion and contacting the rear support member from the rear side. And this rear side support member is screwed and fixed to the rear-end part of a main-body axis | shaft. Thereby, it is not necessary to provide the screwing portion of the rear support member on the front side, and the rear support member can be provided in the grip portion. Therefore, the rear support member is not loosened by the screwing operation. .

  Moreover, according to 5th invention among this invention, a rod-shaped object can be used as the core for mechanical pencils. Accordingly, the screwdriver according to the present invention can be used in place of the pencil most frequently used at the manufacturing site and the like, thereby improving the storage management and portability of tools and writing instruments at the manufacturing site.

It is a side view which shows the external appearance of the screwdriver which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view of the screwdriver which concerns on 1st embodiment of this invention. It is an expansion longitudinal cross-sectional view of the main axis | shaft of the screwdriver which concerns on 1st embodiment of this invention. It is IV-IV sectional drawing in FIG. 3 of the screwdriver which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view of the screwdriver which concerns on 2nd embodiment of this invention. It is a longitudinal cross-sectional view of the screwdriver which concerns on 3rd embodiment of this invention.

(First embodiment)
1st embodiment of this invention is described based on figures. FIG. 1 is a side view showing an appearance of a screwdriver 10 according to an embodiment of the present invention. A rear end portion of a first body shaft 14 formed in a rod shape is fixed to the grip portion 11 of the screwdriver 10. A second main body shaft 15 formed in a rod shape is detachable on the front side of the first main body shaft 14. A main body shaft 13 is formed by the first main body shaft 14 and the second main body shaft 15. A fitting portion 16 that is fitted to the screw head portion is provided at the distal end portion of the second main body shaft 15. In the present embodiment, the fitting portion 16 has a plus shape that can be fitted with a screw head of a plus screw.

  The inside of the first main body shaft 14 is hollow, and a rod-like object feeding mechanism capable of feeding the rod-like object is provided in the hollow shape. The grip portion 11 is provided with a knock member 12 that partially protrudes from the rear end portion of the grip portion 11. The knock member 12 is a movable portion that can operate the rod-like object feeding mechanism. In this embodiment, the rod-shaped object is a sharp core 17 as a core for a mechanical pencil. And the knock member 12 is formed so that knock operation is possible, and the sharp core 17 is drawn out by performing this knock operation.

  Next, a description will be given based on FIG. FIG. 2 is a longitudinal sectional view of the screwdriver 10 in a state where the second main body shaft 15 is mounted on the first main body shaft 14. As shown in FIG. 2, the knock member 12 is connected to the rear end of the core tank 21 of the rod-like object feeding mechanism 20 provided inside the main body shaft 13. At the tip of the first main body shaft 14 of the main body shaft 13, there is provided a first core protrusion 14 a that opens so that the sharp core 17 that is fed by the rod-like object feeding mechanism 20 can protrude. The second body shaft 15 in front of the first core protrusion 14a is provided with a through hole 15a1 concentric with the first core protrusion 14a. And the 2nd core protrusion part 15a is provided in the front-end part (in other words, the front-end | tip of the fitting part 16) of the through-hole 15a1.

  As described above, in the present embodiment, the core protrusions from which the sharp core 17 that is fed out by the rod-like object feeding mechanism 20 protrudes serve as the first core protrusion 14a and the second core protrusion 15a. And the second main body shaft 15. Therefore, it is possible to write with the sharp core 17 with the second main body shaft 15 removed from the first main body shaft 14, or the sharp core 17 protrudes even when the second main body shaft 15 is mounted on the first main body shaft 14. You can also write.

  Next, the rod-shaped object feeding mechanism 20 and the like will be described in detail based on FIG. The rod-like object feeding mechanism 20 is provided with a lead tank 21 in which the sharp lead 17 is stored. A chuck member 22 is fixed to the tip of the lead tank 21. The chuck member 22 is formed by combining long members that are divided into three portions of 120 degrees in the circumferential direction. The front portion of the chuck member 22 is formed as a core gripping portion 22a with a larger outer diameter than the rear side. A cup-shaped chuck ring 23 having an opening in the front direction is provided on the outer periphery of the core gripping part 22a so as to be detachable from the core gripping part 22a.

  A grip releasing means for gripping or releasing the sharp core 17 is formed by the core gripping portion 22 a (chuck member 22) and the chuck ring 23. That is, when the lead gripping portion 22a and the chuck ring 23 are engaged, the lead gripping portion 22a is tightened, and the sharp lead 17 is gripped by the lead gripping portion 22a. When the lead gripping portion 22a moves to the front end side and the lead gripping portion 22a and the chuck ring 23 are disengaged, the lead gripping portion 22a slightly opens and the sharp lead 17 is released.

  On the other hand, a tapered opening 14 b having a tapered outer shape is press-fitted and fixed to the distal end portion of the first main body shaft 14. On the rear side of the inner peripheral surface of the tip 14b, a plurality of rib portions 14b1 extending in the front-rear direction are formed in the circumferential direction. The rear end of the rib portion 14b1 forms a step portion 14b2 on the inner peripheral surface of the first main body shaft 14. Further, step portions 14b3 are formed on the inner side surfaces of the plurality of rib portions 14b1, respectively. Therefore, the diameter of the space formed on the inner side surface of the rib portion 14b1 is formed by reducing the inner side surface on the front side from the inner side surface on the rear side with respect to the stepped portion 14b3. The outer diameter of the chuck ring 23 is formed smaller than the diameter due to the inner surface of the rib portion 14b1 on the rear side of the step portion 14b3. Therefore, the chuck ring 23 is provided movably back and forth on the rear side of the stepped portion 14b3. The outer periphery of the core gripping portion 22a of the chuck member 22 is formed so as to be slidable with the inner surface of the rib portion 14b1 on the front side of the step portion 14b3.

  On the other hand, a sleeve 25 is provided between the outer periphery of the chuck member 22 and the inner peripheral surface of the first main body shaft 14. The sleeve 25 is formed in a substantially cylindrical shape. The outer peripheral surface of the core tank 21 is in sliding contact with the inner peripheral surface of the sleeve 25. Therefore, the lead tank 21 is guided by the inner peripheral surface of the sleeve 25 so as to be movable back and forth. An annular protrusion 25a is formed on the inner peripheral surface in the vicinity of the front end of the sleeve 25 so as to protrude annularly from the inner peripheral surface.

  A coil spring 24 wound around the outer periphery of the chuck member 22 is provided between the rear surface of the annular protrusion 25a and the front end surface of the core tank 21. The core tank 21 is urged rearward by the coil spring 24. On the other hand, the chuck ring 23 is loosely fitted in and brought into contact with a recess formed on the front surface of the annular protrusion 25a. The rearward movement of the core tank 21 is restricted by the contact between the chuck ring 23 and the front surface of the annular protrusion 25a.

  Further, the front end of the sleeve 25 and the stepped portion 14b2 formed on the inner peripheral surface of the first main body shaft 14 come into contact with each other, and the movement of the sleeve 25 toward the front side is restricted. A stop member 18 through which the core tank 21 penetrates is connected to the rear end of the first main body shaft 14 by screwing. A coil spring 18 a is provided between the front end of the stopper member 18 and the rear end of the sleeve 25. The coil spring 18a is provided in a compressed state. Therefore, the sleeve 25 is pressed against the stepped portion 14b2 by the stop member 18 and the coil spring 18a.

  As described above, the rod-like object feeding mechanism 20 includes the sleeve 25, the chuck member 22 held by the sleeve 25, the chuck ring 23, the core tank 21, and the coil spring 24. And the front-end part of the sleeve 25 used as the front-end part of the rod-shaped object feeding mechanism 20 is contact | abutted with the step part 14b2. Further, the rear end portion of the sleeve 25 serving as the rear end portion of the rod-shaped object feeding mechanism 20 is brought into contact with the rear side support member including the stop member 18 and the coil spring 18a. Then, the stop member 18 of the rear support member is screwed to the rear end portion of the main body shaft 13. Thus, since the rod-like object feeding mechanism 20 is fixed inside the main body shaft 13 (first main body shaft 14), the rear side support member (stopping member) can be used even when the screwdriver 10 is used to turn the screw. 18) and the main shaft 13 are not loosened.

  On the other hand, a slider 19 through which the sharp core 17 passes is provided in the front opening 14b so as to be movable back and forth. A pipe-shaped pipe guide 19 a is formed on the front side of the slider 19. The pipe guide 19a is projected and retracted from the tip opening portion of the tip opening 14b of the first main body shaft 14. The tip of the pipe guide 19a is a first core protrusion 14a, and the sharp core 17 is protruded. On the rear side of the slider 19, a gripping portion 19b that can grip the sharp core 17 with a light gripping force is formed.

  Specifically, the slider 19 can form the pipe guide 19a with a metal thin tube, for example, and can form the holding part 19b with a soft resin material by insert molding in this metal thin tube. Alternatively, the slider 19 can be formed by injection molding with the pipe guide 19a and the gripping part 19b integrated, and the gripping part 19b can be provided with a slit or the like to give an elastic force so that the sharp core 17 is lightly gripped. .

  An annular groove portion 14c is formed on the rear side of the first main body shaft 14, and an overhang portion 14d is formed on the further rear side of the groove portion 14c. Here, the grip portion 11 is formed of a rubber material or the like. When the rear end of the first main body shaft 14 is press-fitted into the through hole 11a of the grip portion 11, the front end of the grip portion 11 is engaged with the groove portion 14c, and the overhang portion 14d bites into the grip portion 11. It is fixed to the grip part 11. And the relative rotation of the grip part 11 and the 1st main body axis | shaft 14 is prevented.

  The operation of the rod-like object feeding mechanism 20 thus formed, that is, the feeding of the sharp core 17 is as follows. First, the knock member 12 at the rear end of the grip portion 11 is pushed and knocked to advance the knock member 12. Then, the lead tank 21 moves forward against the elastic force of the coil spring 24. As the lead tank 21 advances, the chuck member 22 and the chuck ring 23 also advance. At this time, since the sharp core 17 is gripped by the core gripping portion 22a, the sharp core 17 also moves forward.

  Since the gripping portion 19b of the slider 19 is lightly gripping the sharp core 17, the slider 19 also moves forward with the advancement of the sharp core 17 and comes into contact with the regulation step portion in the leading end 14b. At this time, the pipe guide 19a of the slider 19 projects together with the sharp core 17 from the tip opening of the tip 14b.

  Then, the front end of the chuck ring 23 comes into contact with the stepped portion 14b3, and the engagement between the chuck ring 23 and the core gripping portion 22a is released. When the engagement between the chuck ring 23 and the lead gripping portion 22a is released, the lead gripping portion 22a is slightly opened and the sharp lead 17 is released. When the finger is released from the knock member 12, the core tank 21 and the chuck member 22 are moved rearward by the urging force of the coil spring 24, and the chuck ring 23 is engaged and fitted on the outer periphery of the core gripping portion 22a. . At this time, since the sharp core 17 is lightly gripped by the grip portion 19b of the slider 19, the sharp core 17 is not returned to the rear side.

  In this way, the sharp core 17 is fed out from the first core protrusion 14a (specifically, the tip of the pipe guide 19a). Furthermore, when the second main body shaft 15 is attached to the first main body shaft 14, when this knocking operation is repeated, the sharp core 17 is inserted from the first core protrusion 14a into the through hole 15a1, and the second It protrudes from the core protrusion 15a.

  In the state where the knock member 12 is pressed and the sharp core 17 is released by the chuck member 22, the sharp core 17 protruding from the core protrusion (the first core protrusion 14a or the second core protrusion 15a) is placed inside the main body shaft 13. When pushed in, the sharp core 17 can be immersed in the main body shaft 13.

  Next, the attachment / detachment structure 30 between the first main body shaft 14 and the second main body shaft 15 will be described. As shown in FIG. 3, an annular groove 15 b is formed on the rear side of the second main body shaft 15. As shown in FIG. 4, the groove 15b is provided with a C-ring 31 having a C-shaped cross-sectional view. Here, in the cross-sectional view shown in FIG. 4, the internal mechanism of the main body shaft 13 is omitted, and the cross-sectional view regarding the main body shaft 13 is used. The C-ring 31 has an elastic force and is formed so as to be able to expand and contract in the radial direction. On the other hand, at the joint between the first main body shaft 14 and the second main body shaft 15, the outer periphery of the first main body shaft 14 and the inner periphery of the second main body shaft 15 are formed in a hexagonal cross section.

  As shown in FIGS. 4 and 1, an annular groove 14 f is formed on the outer surface of the hexagonal cross section at the joint portion of the first main body shaft 14. The concave groove portion 14f is formed in a groove shape having a semispherical longitudinal section corresponding to a spherical surface of a ball 32 described later. A ball holding hole 15b1 for holding the ball 32 is formed in the groove portion 15b of the second main body shaft 15 corresponding to the concave groove portion 14f. The ball holding hole 15b1 penetrates from the outer surface to the inner surface of the groove 15b, and is spherical so that the vicinity of the inner peripheral surface of the second main body shaft 15 is convex toward the inner peripheral surface of the second main body shaft 15. It is formed in a shape.

  Therefore, the ball 32 put in the ball holding hole 15b1 is not dropped to the inner peripheral surface side of the second main body shaft 15. About one third of the ball 32 on the inner peripheral surface side of the second main body shaft 15 protrudes from the inner peripheral surface of the second main body shaft 15. And the outer peripheral side of the 2nd main body axis | shaft 15 in the ball | bowl 32 contact | abuts or adjoins to the internal peripheral surface of the C ring 31, and the fall to the outer peripheral side of the 2nd main body axis | shaft 15 is prevented.

  The first body shaft 14 and the second body shaft 15 thus formed are attached and detached when the second body shaft 15 is pulled from the first body shaft 14 in the axial direction, the ball 32 is detached from the concave groove portion 14f, and the ball 32 rides on the hexagonal flat surface of the first main body shaft 14. Then, the ball 32 pushes up the inner surface of the C ring 31, and the C ring 31 is expanded in diameter. Then, the locking of the first main body shaft 14 and the second main body shaft 15 is released, and the second main body shaft 15 can be pulled out from the first main body shaft 14.

  To attach the second main body shaft 15 to the first main body shaft 14, if the second main body shaft 15 is inserted into the first main body shaft 14, the ball 32 fits into the groove 14f, and the first main body shaft 14 and the second main body shaft 14 are inserted. The shaft 15 is locked, and the second body shaft 15 does not easily come off from the first body shaft 14. Moreover, since the cross-sectional shape in the junction part of the 1st main body axis | shaft 14 and the 2nd main body axis | shaft 15 is hexagonal shape, transmitting the torque from the grip part 11 to the fitting part 16 of the 2nd main body axis | shaft 15 efficiently. Can do.

(Second embodiment)
Next, the screwdriver 50 in the second embodiment according to the present invention will be described with reference to FIG. The screwdriver 50 according to this embodiment is a second main body shaft 55 that is different from the second main body shaft 15 in the screwdriver 10 of the first embodiment and is not provided with a core protrusion. Therefore, the core protrusion of the screwdriver 30 in the present embodiment is provided only on the first core protrusion 14 a of the first main body shaft 14. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The second main body shaft 55 of the screwdriver 50 is formed to be detachable from the first main body shaft 14 by the detachable structure 30. On the other hand, a predetermined space 57 is formed inside the second main body shaft 55 so that the sharp core 17 can be attached to the first main body shaft 14 even when the sharp core 17 protrudes to some extent from the first core protrusion 14a. A fitting portion 16 is provided at the tip of the second main body shaft 55.

  In the present embodiment, when writing with the sharp core 17, the second main body shaft 55 is removed from the first main body shaft 14 for writing. And since the 2nd main body axis | shaft 55 in this embodiment is not provided with the through-hole 15a1 and the 2nd core protrusion part 15a compared with the 2nd main body axis | shaft 15 in a 1st Example, more fitting parts 16 are used. It can be formed with high strength.

(Third embodiment)
Next, based on FIG. 6, the screwdriver 60 in 3rd embodiment which concerns on this invention is demonstrated. The screwdriver 60 according to the present embodiment is a body shaft 63 that is integrally formed without being separated from the detachable structure 30 that connects the first body shaft 14 and the second body shaft 15 in the first embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The body shaft 63 formed in a rod shape has a hollow interior. A rod-like object feeding mechanism 20 for feeding the sharp core 17 is provided inside the hollow shape. Further, a core guide piece 63 b formed in a tapered substantially cylindrical shape is fixed to the front side inside the main body shaft 63. A plurality of rib portions 63b1 are formed in the circumferential direction at the rear portion of the core guide piece 63b. The rear end portion of the rib portion 63b1 is a stepped portion 63b2 formed inside the main body shaft 63, and the front end portion of the sleeve 25 of the rod-like object feeding mechanism 20 is in contact therewith. As in the first embodiment, the sleeve 25 is held against the stepped portion 63b2 by the rear support member formed by the stopper member 18 and the coil spring 18a, so that the rod-like object feeding mechanism 20 is held in the main body shaft 63. Is done.

  Further, on the inner side surface of the rib portion 63b1 on the front side of the step portion 63b2, step portions 63b3 that come into contact with the chuck ring 23 are respectively formed. Therefore, as in the first embodiment, the chuck ring 23 is brought into contact with the stepped portion 63b3 by the knocking operation, and the engagement with the outer periphery of the core gripping portion 22a is released.

  A guide pipe 62 formed of a metal thin tube or the like is fixed to the distal end portion of the core guide piece 63b. A gripping member 64 that lightly grips the sharp core 17 is press-fitted and fixed behind the guide pipe 62. The sharp core 17 is inserted through the guide pipe 62 and the gripping member 64. Similar to the grip portion 19b of the slider 19 in the first embodiment, the grip member 64 releases the sharp core 17 to the rear side when the sharp core 17 is extended in the rod-like object supply mechanism 20. The sharp core 17 is prevented from returning when returning.

  A through hole 63a1 is formed on the front side of the guide pipe 62 toward the outside, and the sharp core 17 is inserted into the through hole 63a1. In this manner, the core protrusion 63a is formed at the tip of the main body shaft 63 (in other words, the tip of the fitting portion 16), and the sharp core 17 protrudes from the core protrusion 63a so that writing can be performed.

  According to the screwdriver 30 in the present embodiment, the attachment / detachment structure 30 is not provided, and the structure can be simplified, so that the main shaft 63 can be made stronger, and the manufacturing cost can be reduced. Can do. In this embodiment, the guide pipe 62 is provided and the sharp core 17 is protected. However, the guide pipe 62 may be omitted.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the aspect of said 1st embodiment thru | or 3rd embodiment, It can implement by adding a various change. For example, in the above embodiment, the rod-like object feeding mechanism 20 that feeds the sharp core 17 by the knocking operation of the knocking member 12 is used. However, a rotary rod-like object feeding mechanism may be used.

  In this case, the movable part partially protruding from the rear end of the grip part 11 is formed as a rotary knob. Then, when the rotary knob is rotated, the grip release means in the rod-like object feeding mechanism releases the sharp core 17, and the sharp core 17 can be fed out by a screw structure or the like. When the rotation of the rotary knob is stopped, the grip release means grips the sharp core 17 and can write. In addition, a well-known bar-shaped material feeding mechanism such as a side knock type bar-shaped material feeding mechanism may be employed.

  Further, the rod-like object feeding mechanism 20 is configured to be urged and pressed from the rear side by the rear side support member formed by the stop member 18 and the coil spring 18a. However, the rear side support member is not limited to this, and the The member 18 and the coil spring 18a are integrated, another elastic member is used instead of the coil spring 18a, or the stopper member 18 is extended to the front side so that the stopper member and the sleeve 25 are in direct contact with each other, thereby supporting the rear support member. May be configured.

  The attachment / detachment structure 30 for attaching / detaching the second main body shaft 15 to / from the first main body shaft 14 has a structure in which the ball 32 is pressed by the C ring 31, but is not limited thereto. Various forms such as overcoming fitting between each other can be adopted.

  Further, in the above embodiment, the joint portion between the second main body shaft 15 and the first main body shaft 14 is formed as a hexagonal cross section, but it is provided with a fitting by a key and a key groove, or one or more plane portions. Can be configured. That is, as long as the rotation of the second main body shaft 15 with respect to the first main body shaft 14 is restricted, various types can be adopted.

  Moreover, in the above embodiment, although it demonstrated as the sharp core 17 as a rod-shaped object, the rod shape used for various operations, such as a writing instrument formed with solid objects, such as a ball-point pen and a crayon, or a marking tool. It can be a thing. Furthermore, although the fitting part 16 was formed in the plus shape in the above embodiment, it is not limited thereto, and may be a fitting part corresponding to various screws and bolts such as a minus or hexagon. it can.

DESCRIPTION OF SYMBOLS 10 Screwdriver 11 Grip part 11a Through-hole 12 Knock member 13 Main body axis | shaft 14 1st main body axis | shaft 14a 1st core protrusion part 14b Front opening 14b1 Rib part 14b2 Step part 14b3 Step part 14c Groove part 14d Overhang | projection part 14f Concave groove part 15 2nd Main body shaft 15a Second core protrusion 15a1 Through hole 15b Groove 15b1 Ball holding hole 16 Fitting part 17 Sharp core 18 Stopping member 18a Coil spring 19 Slider 19a Pipe guide 19b Grasping part 20 Rod-like object feeding mechanism 21 Core tank 22 Chuck member 22a Core gripping part 23 Chuck ring 24 Coil spring 25 Sleeve 25a Annular protrusion 30 Detachable structure 31 C ring 32 Ball 35 Second main body shaft 50 Screwdriver 55 Second main body shaft 60 Screwdriver 62 Guide pipe 63 Main body shaft 63a Core protrusion 63a1 Through hole 63b Core guide piece 3b1 rib 63b2 step portion 63b3 step portion 64 gripping member

Claims (5)

A grip portion and a body shaft;
The main body shaft has a hollow rod shape, has a fitting portion fitted to a screw head at a tip portion, a rear end portion is fixed to the grip portion, and is formed so that a rod-like object can be extended and submerged therein. Provided with a rod projecting mechanism, a core projecting portion for projecting the rod-shaped object fed by the rod-shaped object feeding mechanism,
The grip portion includes a movable portion that partially protrudes from a rear end of the grip portion and that can operate the rod-shaped object feeding mechanism .
The body axis is
A first main body shaft having an annular groove portion and being fixed to the grip portion;
A ball holding hole for holding a ball that fits in and out of the concave groove while projecting toward the first main body shaft side, and an elastic force toward the first main body shaft side by bringing an inner peripheral surface into contact with the ball. A second body shaft that has a C-ring to be pressed and the fitting portion and whose rotation is restricted while being detachable in the axial direction relative to the first body shaft
A screwdriver characterized by being formed by: The first body shaft is inserted into the second body shaft;
The ball holding hole is penetrated from the outer surface to the inner surface of the second main body shaft, and the vicinity of the inner peripheral surface of the second main body shaft is convex toward the inner peripheral surface of the second main body shaft. Formed into a spherical shape,
The screwdriver according to claim 1.   The screwdriver according to claim 1 or 2, wherein the core projecting portion is provided at a tip of the fitting portion. A step portion formed inside the main body shaft and in contact with a front end portion of the rod-shaped object feeding mechanism;
A rear support member screwed into a rear end portion of the main body shaft and in contact with a rear end portion of the rod-shaped object feeding mechanism;
The screwdriver according to any one of claims 1 to 3, wherein the screwdriver is provided. The rod-shaped object is a lead for a mechanical pencil,
The screwdriver according to any one of claims 1 to 4, wherein the bar-shaped object feeding mechanism has a grip release means for gripping or releasing the mechanical pencil lead.

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