JPH0560889U - Touch-fing type mechanical pencil - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Easy-to-use and easy-to-use touch-fing type mechanical pencil that does not require knocking. [Structure] A lead-fixing force capable of withstanding a writing pressure is exerted by a spring 21 urged backward by a retracting spring 19 and tightened by a ball 21 arranged on an outer surface thereof, and a lead can be pulled out forward with a slight force. Wick-fixing chuck 1
8 and the holding chuck 15 so as to be arranged in front thereof and the tactile-finger operating part 13 is exposed outside the axis, and the tactile-finger extending body 10 is movable for a required distance in the axial direction. It is biased forward by a pull-out spring 23 having a stronger spring force than the spring 19 so that its front end face abuts on the rear end face of the finger-feeding body 10 and is integrally interlocked with the lead fixing chuck 18 during forward movement and retreats. At times, a sliding body 22 that interlocks so as to be free is interposed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 With the present invention, when the lead is worn out during writing, the touching finger feed body arranged at the tip of the shaft is gently pulled backward with the fingertip and released while keeping the writing state. The present invention relates to a touch-fing type mechanical pencil capable of feeding a required amount of lead.

[0002]

[Prior Art]

 This type of conventional touch-fed mechanical pencil has a knock body at the rear end of the shaft in addition to the finger-feeding body, and the core is a holding chuck arranged inside the fixed core chuck and the finger-feeding body. The core can be drawn out by the finger-feeding body only when it is gripped on the other side. In other cases, for example, when drawing out the second and subsequent cores following the core in writing, or drawing out a completely new core. In this case, it is necessary to press the knock body so that the lead fixing chuck and the holding chuck hold the lead. Also, when the lead is returned to the shaft after writing, the knock body is also pressed to hold the lead. I had to complain that the operation was extremely troublesome because I had to open the.

[0003]

[Problems to be solved by the device]

 Therefore, the present invention is not only for feeding the lead held by the lead fixing chuck and the holding chuck, but also for feeding the second and subsequent lead following the lead being written, and for feeding a completely new lead. The purpose of the present invention is to provide a touch-fing type mechanical pencil that can improve the usability by simplifying the operation by making it possible only by the operation by.

[0004]

[Means for Solving the Problems]

 The first finger-feeding type mechanical pencil of the present invention devised to achieve the above object resists writing pressure by being urged rearward by a retracting spring 19 and tightened by a ball 21 arranged on the outer surface thereof. The core fixing chuck 18 that exerts the core fixing force to be obtained and allows the core to be pulled out forward with a slight force, and the holding chuck 15 is fitted inside so as to be arranged in front of the core fixing chuck 18. Between the touch-finger operating body 13 which is exposed outside the shaft and is movable by a required distance in the axial direction, the pull-out spring 23 having a stronger spring force than the pull-in spring 19 is urged forward. A sliding body 22 is provided which abuts its front end surface with the rear end surface of the finger-feeding body 10 and which is integrally interlocked with the core fixing chuck 18 during forward movement and is locked so as to be free during backward movement. Those comprising a structure characterized in that the.

The second finger-feeding type mechanical pencil of the present invention, which is also devised to achieve the above-mentioned object and reduce the number of parts, is urged rearward by a retracting spring 19 to form an outer surface portion thereof. By tightening the ball 21 arranged at the center, a core fixing force capable of withstanding the writing pressure is exerted, and the lead can be pulled out to the front with a slight force. The holding chuck 15 is fitted to the inside so that the touch operation part 13 is exposed off the axis, and the finger feed body 10 is movable for a required distance in the axial direction. The end portions are locked together so as to be integrally linked to the lead fixing chuck 18 when moving forward and mutually free when moving backward, and the finger feeding body 10 has a pull-out spring having a stronger spring force than the pull-in spring 19 described above. 23, the structure is characterized in that it is biased forward by 23.

Further, a third finger-feeding type mechanical pencil of the present invention devised in order to achieve the above object and further reduce the cost is the same as the finger-feeding type sharp pencil according to claim 1 or 2. Instead of the holding chuck 15, a holding chuck portion 34 is integrally formed inside the finger-feeding body 10.

Further, a fourth touch-finger-feeding type mechanical pencil of the present invention, which is also devised in order to achieve the above-mentioned object and in addition to eliminate waste of the lead, is the touch-sensitive mechanical pencil according to claim 1 or 2. Instead of the holding chuck 15 in the finger-feeding mechanical pencil, a tip chuck 35 is axially movably fitted inside the finger-feeding body 10, and the tip chuck 35 is attached to the finger-feeding body 10 by a tip spring. It is configured to be urged rearward by 36.

[0008]

[Action]

 In a state where the writing pressure is not applied to the lead fixing chuck 18, the lead fixing chuck 18 moves the lead fixing chuck 18 forward and maintains an open state, so that a second lead or a new lead following the lead worn down by writing is newly added. The replenished lead passes through the inside of the lead-fixing chuck 18 by natural fall and reaches the tip of the holding chuck 15, the holding chuck portion 34, or the tip chuck 35. In this state, when a finger is put on the finger operation part 13 of the touch-feeding body 10 and pulled backward, the sliding body 22 is pushed by the touch-feeding body 10 and retracts, and at that time, the lead fixing chuck 18 slides. Since it becomes free from 22 and is retracted by the retracting spring 19 to strongly grip and fix the core, the tip of the core 5 is inserted and gripped inside the holding chuck 15 or the like that retracts together with the finger feed body 10. Become. Then, when the finger is released from the touch operation section 13, it is pushed by the pull-out spring 23 and the touch-feeding body 10 advances, so that the core 5 grasped by the holding chuck 15 or the like is extended forward.

[0009]

【Example】

 Hereinafter, embodiments will be described in detail with reference to the drawings. First, FIG. 1 to FIG. 5 show a first embodiment of a finger-feeding type mechanical pencil according to claim 1. FIG. 1 shows the entire structure. A barrel 1 has a rear end (in the drawing, the upper side indicates the rear side and the lower side indicates the front side), a tail plug 2 is detachably fitted, and a cap 3 is screwed on the front end. And a chuck set 4 is attached to the front end of the inside, and a small hole 6 through which only one core 5 can pass is bored in the rear part of the chuck set 4 and a partition wall 7 having a backside is formed as a stave. The inner space behind the wall 7 is the wick storage section 8.

As shown in FIG. 2, a tip pipe 9 is attached to the front end of the mouthpiece 3, and a central tubular portion 11 of a finger feed body 10 is housed inside. The tentacle feeding body 10 is provided with a short tubular haptic finger operating portion 13 connected to an outer peripheral position of a central tubular portion 11 by an arm piece 12. The arm piece 12 of the finger feed body 10 penetrates the notch 14 formed in the mouthpiece 3, and the finger operation part 13 is exposed at the outer peripheral portion of the mouthpiece 3. The toe-feeding body 10 is movable in the axial direction (front-back direction) by moving the arm piece 12 along the notch 14 of the mouthpiece 3. A holding chuck 15 made of rubber or the like, which allows the core 5 to be inserted with an appropriate frictional force, is fitted inside the central tubular portion 11 of the touch-feeding body 10 as shown in FIG.

As shown in FIG. 3, the chuck set 4 attached to the inner front end of the shaft cylinder 1 includes a chuck case 17 having a tapered portion 16 on an inner surface thereof, and a lead fixing chuck 18 housed in the chuck case 17. A retracting spring 19 for urging the lead fixing chuck 18 backward, a ball 21 fitted in a recess 20 formed in the outer surface of the lead fixing chuck 18, and an axial sliding inside the front end of the chuck case 17. It is composed of a ring-shaped sliding body 22 movably arranged and a pull-out spring 23 for urging the sliding body 22 forward.

The chuck case 17 has its rear end surface abutted on a step portion 31 provided slightly forward of the partition wall 7 inside the shaft cylinder 1, and the rear end edge of the mouthpiece 3 abutted on the front end surface. The retracting spring 19 is interposed in the chuck case 17 between the large-diameter portion 25 at the rear end of the lead fixing chuck 18 and the step portion 26 formed in the chuck case 17 to bias the lead fixing chuck 18 rearward. is doing. The ball 21 comes into contact with the taper portion 16 of the chuck case 17, and when the lead fixing chuck 18 retracts by the force of the retracting spring 19, the outer diameter of the lead fixing chuck 18 is reduced and the lead 5 inserted into the lead fixing chuck 18 is reduced. Hold and fix. The fixing force of the lead fixing chuck 18 with respect to the lead 5 is a strength capable of withstanding the force of pushing the lead 5 backward by the writing pressure. Further, the retracting spring 19 exerts a slight force on the core 5 held by the core fixing chuck 18 (a force smaller than the frictional force for fixing the core 5 by the holding chuck 15 fitted on the touch finger feeding body 10). The spring constant is so small that it can be easily compressed to move the lead-fixing chuck 18 forward and open to remove the grip of the lead 5 when the lead 5 is pulled forward. The lead fixing chuck 18 has a protruding cylindrical portion 27 at the front end and an outwardly bent flange 28 at its tip, and the flange 28 is inserted into the inner hole 29 of the sliding body 22. The sliding body 22 is provided with an inward locking piece 30 at the rear end of its inner hole 29, and the locking piece 30 is located rearward of the brim 28 of the lead fixing chuck 18. When the collar 28 of the lead fixing chuck 18 is inserted into the inner hole 29 of the sliding body 22, the outer diameter of the protruding cylindrical portion 27 is reduced. The draw-out spring 23 has a stronger spring force than the draw-in spring 19 and is interposed between the rear end of the sliding body 22 and the step portion 24 formed on the inner surface of the chuck case 17 slightly forward of the taper portion 16. Thus, the sliding body 22 is biased forward. As a result, the front end surface of the sliding body 22 is brought into contact with the rear end surface of the finger feeding body 10, and the front surface of the locking piece 30 is brought into contact with the rear surface of the brim 28 of the lead fixing chuck 18. Therefore, when the sliding body 22 moves forward, the locking piece 30 presses the brim 28 so that the lead fixing chuck 18 also moves forward integrally, but when the sliding body 22 retracts, the lead fixing chuck 18 and the sliding body 22 move. Have a free relationship. An inward projection 32 is provided on the inner surface of the front end of the chuck case 17, and the sliding body 22 is prevented from coming off by the projection 32. A slit (not shown) is formed at the front end of the chuck case 17 so that the inner diameter of the chuck case 17 can be easily enlarged so that the sliding body 22 can be inserted into the chuck case 17.

FIG. 3 shows a writing state. When equal pressure is applied to the tip of the lead 5, the lead 5 is pushed rearward and holds the lead 5, together with the holding finger 15 and the finger feed body 10 and the sliding body. 22 also pushes backward and moves backward, and the lead fixing chuck 18 also holds and fixes the lead 5 with the lead spring 19 retracting by α.

FIG. 4 shows a state in which the finger-feeding body 10 is pulled backward with the tip of a finger in order to feed out the core 5, and the lead-fixing chuck 18 holds and fixes the lead 5. Since the sliding body 22 is in a free state with respect to the core fixing chuck 18, the sliding body 22 is integrally retracted to the retracted limit of the finger feeding body 10 and the holding chuck 15 grips and fixes the rear portion of the core 5. ..

FIG. 5 shows a state in which a finger is removed from the touch finger feeding body 10, and the sliding body 22, the touch finger feeding body 10, and the holding chuck 15 are pushed forward by the pull-out spring 23, and at this time, The holding chuck 15 feeds the lead 5 by the amount of advance of the holding chuck 15. Further, since the brim 28 of the lead fixing chuck 18 is pulled by the locking piece 30 of the sliding body 22, the lead fixing chuck 18 is advanced and expanded to release the grip of the lead 5.

When the lead 5 during writing is worn and the second lead 5 following it is continuously fed out or when a new lead is fed out, the lead is placed inside the lead fixing chuck 18 as shown in FIG. After inserting 5 by natural fall, the finger feed body 10 may be operated normally. Further, when the tip of the lead 5 protruding from the tip pipe 9 is to be immersed after the writing is finished, the tip of the lead 5 may be pushed back while being pressed by the fingertip so that the finger-feeding body 10 does not retract.

FIG. 6 shows a second embodiment of the finger-feeding type mechanical pencil according to claim 1, which is inserted into the central tubular portion 11 of the finger-feeding body 10 at the front part of the sliding body 22. The core guide tube portion 33 is extended so that the core 5 can be smoothly fed out and the core 5 can be prevented from being damaged.

FIG. 7 shows an embodiment of a finger-feeding type mechanical pencil according to a second aspect of the present invention, which is the sliding body 22 in the finger-feeding type mechanical pencil according to the first aspect. It has a structure integrated with. That is, without using the sliding body 22, a locking piece that locks the rear end portion of the finger feeding body 10 so as to be integrally interlocked with the lead fixing chuck 18 when moving forward and mutually free when moving backward. A portion 37 is provided, and the rear end face of the touch finger feeding body 10 is directly urged forward by a pull-out spring 23.

FIG. 8 shows an embodiment of the finger-feeding type mechanical pencil according to claim 3, wherein the touch-fing type mechanical pencil according to claim 1 (also the finger-feeding type sharp pencil according to claim 2 is used. In place of the holding chuck 15 fitted in the finger feed body 10, the holding chuck portion 34 is integrally formed on the finger feed body 10 to reduce the cost.

FIG. 9 shows an embodiment of the finger-feeding type mechanical pencil according to claim 4, wherein the finger-feeding type mechanical pencil according to claim 1 (also the finger-feeding type sharp pencil according to claim 2 is used. In place of the holding chuck 15 fitted to the touch finger feeding body 10, the tip chuck 35 is fitted inside the touch finger feeding body 10 so as to be movable in the axial direction, and the tip chuck 35 is fitted to the touch finger feeding body 10. By biasing the tip 5 toward the rear by the tip spring 36, even if the lead 5 during writing is worn and its rear end is pulled out to the front of the lead fixing chuck 18, the tip 5 will cause the lead 5 to move. The core 5 can be used without waste by maintaining the fixed state and enabling writing.

[0021]

[Effect of the device]

 The present invention is as described above. Of course, in the case where the lead is worn out during writing, it is of course possible to extend the required amount of lead by operating the finger-feeding body while maintaining the writing state. Especially when the core during writing is exhausted and the second core that follows is unrolled, or when a completely new core is unrolled, there is no need to press the knock body placed at the rear end of the shaft as in the past. In addition, there is an effect that the core can be easily fed out only by operating the finger-feeding body.

Further, in the case of the finger-feeding type mechanical pencil according to the second aspect, in addition to the above effects, there is an advantage that the number of parts is reduced and the cost is reduced.

In addition, in the case of the finger-feeding type mechanical pencil according to the third aspect, in addition to the above-mentioned effects, there is an advantage that the cost can be similarly reduced.

Further, in the case of the finger-feeding type mechanical pencil according to the fourth aspect, in addition to the above effects, there is an advantage that the waste of the lead is small and it is economical.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a finger-feeding type mechanical pencil according to a first aspect of the present invention.

FIG. 2 is a perspective view of a mouthpiece and a finger-feeding body according to a first embodiment of the touch-feeding-type mechanical pencil according to claim 1;

FIG. 3 is an enlarged cross-sectional view of a main part in a writing state, showing the first embodiment of the finger-feeding type mechanical pencil according to claim 1.

FIG. 4 is an enlarged cross-sectional view of the essential parts of the first embodiment of the finger-feeding mechanical pencil according to claim 1, showing a state where the finger-feeding body is pulled rearward.

FIG. 5 is an enlarged cross-sectional view of a main part of the first embodiment of the finger-feeding type mechanical pencil according to claim 1, wherein the finger-feeding body is moved backward by pulling it backward and then releasing it. is there.

FIG. 6 is an enlarged sectional view of an essential part showing a second embodiment of the finger-feeding type mechanical pencil according to the first aspect.

FIG. 7 is an enlarged sectional view of an essential part showing an embodiment of the touch-fing type mechanical pencil according to claim 2;

FIG. 8 is an enlarged cross-sectional view of an essential part showing an embodiment of a finger-feeding type mechanical pencil according to a third aspect of the present invention.

FIG. 9 is an enlarged cross-sectional view of an essential part showing an embodiment of a finger-feeding type mechanical pencil according to a fourth aspect of the present invention.

[Explanation of symbols]

 1 Shaft Tube 2 Tail Plug 3 Clasp 4 Chuck Set 5 Core 6 Small Hole 7 Partition Wall 8 Core Storage 9 Tip Pipe 10 Finger Feeder 11 Center Tube 12 Arm Piece 13 Touch Finger Operation 14 Notch 15 Holding Chuck 16 Tapered part 17 Chuck case 18 Core fixing chuck 19 Retracting spring 20 Recess 21 Ball 22 Sliding body 23 Drawout spring 24 Step part 25 Rear end large diameter part 26 Step part 27 Projecting cylinder part 28 Collar 29 Inner hole 30 Locking piece 31 step Part 32 Projection 33 Core guide cylinder part 34 Holding chuck part 35 Tip chuck 36 Tip spring 37 Locking piece part

Claims (4)

[Scope of utility model registration request] 1. A lead-fixing force capable of withstanding writing pressure is exerted by a spring 21 biased backward by a retracting spring 19 and tightened by a ball 21 arranged on the outer surface thereof, and the lead can be pulled out forward with a slight force. And a holding chuck 15 fitted inside so as to be arranged in front of the core fixing chuck 18 to expose the touch operation unit 13 outside the axis and to move the touch finger for a required distance in the axial direction. Feeding body 10
In between, the pulling spring 23 having a stronger spring force than the pulling spring 19 makes the front end face abut against the rear end face of the finger feed body 10 at the time of advancing with respect to the core fixing chuck 18. A tactile-feeding type mechanical pencil having a sliding body 22 interlocked integrally and locked so as to be free when retracted. 2. A lead fixing force capable of withstanding a writing pressure is exerted by a spring 21 urged rearward by a retracting spring 19 and tightened by a ball 21 arranged on the outer surface thereof, and the lead can be pulled out forward with a slight force. And a holding chuck 15 fitted inside so as to be arranged in front of the core fixing chuck 18 and exposing the touch operation section 13 outside the axis, and a touch finger that is movable a required distance in the axial direction. Feeding body 10
And a rear end portion of the finger feeding body 10 is provided with a lead fixing chuck 1
8 are interlocked integrally with each other when moving forward, and are locked so as to be free from each other when moving backward, and the finger-feeding body 10 is biased forward by the pull-out spring 23 having a stronger spring force than the pull-in spring 19 described above. A mechanical pencil that extends the toes. 3. A holding chuck part 34 is integrally formed inside the touching finger feeding body 10 instead of the holding chuck 15 in the touching finger feeding type mechanical pencil according to claim 1 or 2. Touch-fed mechanical pencil. 4. A tip chuck 35 is axially movably fitted to the inside of the finger feed body 10 in place of the holding chuck 15 in the finger feed type mechanical pencil according to claim 1 or 2. Attach the tip chuck 35 to the finger feed body 10.
On the other hand, the finger-feeding type mechanical pencil is characterized in that it is biased rearward by the tip spring 36.