JP4445774B2 - Clip mounting structure for writing instruments - Google Patents

Description

  The present invention relates to a clip mounting structure in a writing instrument.

A writing instrument such as a ballpoint pen or a mechanical pencil is generally provided with a clip at the rear end, and is easily inserted into a pocket or the like.
The clip is attached to a rear end portion of a cylindrical body such as a main body shaft or a cap in the writing instrument, and the front end portion of the clip is biased toward the surface of the cylindrical body.

As a means for applying this urging force, there is one using a coil spring in addition to one using the elastic deformation of the synthetic resin forming the clip.
However, when an elastic deformation of these synthetic resins or a coil spring is used, a large urging force cannot be obtained, and there is a case that the writing tool is removed from the pocket or the like while it is being carried and lost.
Therefore, the thing using a leaf | plate spring is proposed so that a big urging | biasing force can be provided (for example, patent document 1).

  The thing of patent document 1 provides the pivotal support part ahead rather than the rear ends of cylinders, such as a main-body axis | shaft and a cap, and supports a clip with this pivotal support part, and is arrange | positioned behind the pivotal support part. Using a spring, the front end of the clip is elastically brought into contact with the surface of the cylinder.

  However, in this writing instrument, the pivotal support portion of the clip is provided in front of the rear end of the cylindrical body. Therefore, when the clip is inserted into a pocket or the like, not only the insertion depth is shortened, but also the back of the writing instrument. Since the end portion protrudes upward from the pocket, there is a problem that the writing instrument is easily lost from the pocket.

Further, a large force is applied to the pivotal portion by the leaf spring, and the pivotal portion generally formed of a synthetic resin may be damaged.
Furthermore, since the leaf spring is exposed to the outside, there is a risk of rust and damage.
Japanese Patent Laid-Open No. 2001-146094 (see FIGS. 1 and 2)

  In view of the above situation, the present invention uses a leaf spring to obtain a large clamping force of the clip when the writing instrument is inserted into a pocket or the like, and increases the insertion depth, and the rear end of the writing instrument. The clip in the writing instrument is designed to prevent the writing tool from being lost as much as possible, and to prevent the writing tool from being lost. An object of the present invention is to provide a mounting structure.

According to the present invention, the above problem is solved as follows.
(1) One end of a leaf spring having an inverted L shape in a side view is fixed to the rear end of a cylindrical body such as a main body shaft or a cap so that the other end faces rearward and the other end By supporting the rear end portion of the clip with the portion, the clip is attached to the cylindrical body in a state where the front end portion of the clip is biased toward the surface of the cylindrical body.

  (2) In the above item (1), a recess is provided on the inner surface of the rear end of the clip facing the cylinder, and the free end of the leaf spring facing the rear is inserted into the recess. By doing so, the rear end portion of the clip is supported by the other end portion of the leaf spring.

  (3) In the above item (1) or (2), the rear end surface of the cylindrical body is provided with a spring locking projection that protrudes rearward and includes a leaf spring locking portion, and is provided with a through hole. By attaching one end of the leaf spring to the latching portion of the projection for latching the spring after passing through the through hole of the mounting member, the attachment member is attached to the cylinder, and the leaf spring The other end portion is inserted into a recess provided at the rear end portion of the clip, and detachment between the clip and the mounting member is prevented by the detachment preventing means.

  (4) In the above item (3), the spring locking projection is formed in a shape having a substantially quadrangular cross section perpendicular to the axis, provided with locking grooves on the left and right side surfaces, and one end of the leaf spring The U-shaped left and right side pieces are notched in a substantially U shape from the free end, and the left and right locking grooves are respectively locked to the left and right locking grooves, thereby engaging one end of the leaf spring with the spring locking protrusion. Stop.

  (5) In the above item (3) or (4), the mounting member is connected to the left and right sides of a substantially disk-shaped body provided with a through-hole through which the spring locking projection is passed, and side plates are continuously provided. The side plate is provided with a through hole in the left and right direction, and the rear end portion of the clip is also provided with a through hole in the left and right direction, and the rear end portion of the clip is fitted between the left and right side plates of the mounting member. Alignment of the positions of both the through holes of the clip and the mounting member and insertion of a stop pin into both of the above through holes as a detachment preventing means prevent the detachment between the clip and the leaf spring.

  (6) In the above item (5), the through hole of the clip is a long hole in a side view.

  (7) In any one of the above items (1) to (6), the writing instrument is any one of a ballpoint pen, a mechanical pencil, a marking pen, and a fountain pen.

According to the present invention, the following effects can be obtained.
a) According to the invention described in the item (1), since a leaf spring is used, when a writing instrument is inserted into a pocket or the like, a large clamping force of the clip can be obtained, and cylinders such as a main body shaft and a cap Since the rear end of the clip is supported with the other end of the leaf spring fixed to the rear end of the body facing the rear, the insertion depth when the writing instrument is inserted into a pocket, etc. The length by which the rear end portion of the writing instrument protrudes upward from the pocket can be made as short as possible.
Therefore, it becomes difficult for the writing instrument to be easily removed from the pocket, and the loss of the writing instrument can be prevented as much as possible.
Furthermore, since the clip is supported by one end portion of the leaf spring, there is no possibility that the pivotal support portion is loaded with a large force from the leaf spring and damaged as in the conventional writing instrument.

  b) According to the invention described in the above item (2), the rear end of the clip can be easily supported by the one end of the leaf spring, and the leaf spring is not exposed to the outside, and thus is rusted and damaged. There is no fear.

  c) According to the invention described in (3) above, one end of the leaf spring is locked to the locking portion of the spring locking protrusion after passing through the through hole of the mounting member. Both the leaf spring and the mounting member are fixed to the rear end of the cylinder, and the other end of the leaf spring is inserted into the recess provided in the rear end of the clip, so the clip is supported by the leaf spring. In addition, since the detachment between the clip and the attachment member is prevented, the clip is stably attached to the cylindrical body via the attachment member.

  d) According to the invention described in the above item (4), the one end of the leaf spring can be easily attached to the spring-engaging protrusion with good positional stability.

  e) According to the invention described in the above item (5), the attachment member can be easily attached to the spring attachment protrusion through the through hole, and the rear end of the clip is disposed between the left and right side plates of the attachment member. Therefore, the leaf spring supporting the clip is prevented from being exposed to the outside, and the retaining pin is inserted into both the mounting member and the clip, so that the clip and the leaf spring are not detached. Is prevented.

  f) According to the invention described in the above item (6), since a large force from the leaf spring is not applied to the retaining pin inserted into the elongated hole, the retaining pin is damaged and is detached between the clip and the leaf spring. Separation is prevented from occurring.

  g) According to the invention described in the item (7), the effects described in the items (a) to (f) can be achieved in the ballpoint pen, the mechanical pencil, the marking pen, and the fountain pen that implement the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view of a ballpoint pen having a clip mounting structure according to the present invention, FIG. 2 is an enlarged exploded perspective view of a main part showing the clip mounting structure, and FIGS. FIG. 3 shows a state in which the front end portion of the clip is elastically pressed against the surface of the cylindrical body by the urging force of the leaf spring, and FIG. 4 resists the urging force of the leaf spring. The front end of the clip is separated from the surface of the cylinder.

  5, FIG. 6 and FIG. 7 are sectional views taken along lines V to V, VI to VI, and VII to VII in FIG. 3, respectively.

  As shown in FIG. 1, the present invention is a mounting structure for a clip (2) in a writing instrument (1) such as a ballpoint pen, a mechanical pencil, a marking pen, a fountain pen, etc. The rear end (4) is related to the clip (2) supported by a leaf spring (5).

  In the cylindrical body (3), core shafts (6) for black, red and the like are stored by a well-known means. In use, the core shaft (6) of a desired color is selected, The tip (6a) can be projected from the front end opening (7) of the cylinder (3).

  As shown in FIG. 2, the leaf spring (5) for supporting the clip (2) is formed in an approximately inverted L shape when viewed from the side, and both end portions (8) and (9) have free ends, respectively. (8a) A substantially U-shaped cut is provided from (9a).

  The rear end surface (10) of the cylindrical body (3) is provided with a spring locking protrusion (11) protruding rearward. The spring locking projection (11) is formed in a substantially quadrilateral cross section perpendicular to the axis, and is provided with locking grooves (12) on the left, right, top and bottom sides.

  On the other hand, the left and right sides of the disc-like body (14) having the four-sided through holes (13) are connected to the rear side by a substantially backward U-shaped side plate (15) (15) from the rear side. A member (16) is provided.

  The spring locking projection (11) is passed through the through hole (13) of the mounting member (16), and the locking groove (12) in the spring locking projection (11) is connected to the mounting member (16). ), The left and right side pieces (17) and (17) on both sides of the notch in the one end (8) of the leaf spring (5) are placed on the locking groove ( 12), the leaf spring (5) is connected to the cylinder through the spring locking projection (11) with the free end (9a) at the other end (9) facing rearward. It is fixed to the rear end (4) of the body (3).

  The mounting member (16) has the left and right side pieces (17) and (17) of the leaf spring (5) locked to the locking groove (12), thereby allowing the mounting member (16) to pass through the spring locking protrusion (11). It is attached to the cylinder (3).

  The rear end (18) of the clip (2) is curved toward the cylinder (3), and the inner surface (19) facing the cylinder (3) at the rear end (18) is A recess (20) facing rearward is provided.

  The clip (2) is supported by the leaf spring (5) by inserting the free end (9a) facing backward in the leaf spring (5) into the recess (20).

  In the lower part of the rear end of the recess (20), a through hole (21) in the left-right direction is provided, and the through hole (21) is a long hole that inclines forward and downward in a side view (see FIG. 3). ).

  On the other hand, the left and right side plates (15) and (15) of the mounting member (16) are also provided with through holes (22) in the left and right direction.

  The rear end portion (18) of the clip (2) is fitted between the left and right side plates (15), (15) of the mounting member (16), and both the through holes (21 of the clip (2) and the mounting member (16) (21 ) And (22) are aligned, and the clip (2) is attached to the mounting member (16) by inserting a stop pin (23) into the through-holes (21) and (22) as means for preventing detachment. The clip (2) and the leaf spring (5) are not detached from each other so as not to move backward.

  As shown in FIG. 3, the front end of the clip (2) is provided with a protrusion (2a) toward the cylinder (3), and this protrusion (2a) is the surface of the cylinder (3). In the state of being elastically contacted with each other, the rear end face (11a) of the spring locking projection (11) and the opposite face (11a) facing the rear end face (11a) of the rear end part (18) of the clip (2) ( A gap L is formed between 19a).

  In order to insert the writing instrument (1) into a pocket or the like, as shown in FIG. 4, the protrusion (2a) at the front end of the clip (2) is moved away from the surface of the cylinder (3). Then, the clip (2) supported by the leaf spring (5) rotates around the L-shaped folding point in the leaf spring (5) as a fulcrum, and the gap L becomes small. At the same time, since the position of the stop pin (23) is fixed, the through hole (22) in the clip (2) moves downward and forward relative to the stop pin (23). Since (22) is a long hole, the force applied to the stop pin (23) does not increase by the rotation of the clip (2).

  Since the protrusion (2a) at the front end of the clip (2) is urged toward the surface of the cylinder (3) by the leaf spring (2) with a large force, the writing instrument (1) is stabilized in a pocket or the like. Can be inserted in the state.

It is a side view of a ball-point pen provided with the attachment structure of the clip of the present invention. It is a principal part expansion disassembled perspective view which shows the attachment structure of a clip. It is a principal part enlarged side view which shows a part by center longitudinal cross-section, and shows the state which the front-end part of a clip is elastically pressing on the surface of the cylinder by the urging | biasing force of a leaf | plate spring. Similarly, it is a principal part expanded side view which shows a part by center vertical cross section, and shows the state which separated the front-end part of the clip from the surface of the cylinder body against the urging | biasing force of a leaf | plate spring. It is sectional drawing of the VV line in FIG. Similarly, it is sectional drawing of the VI-VI line in FIG. Similarly, it is sectional drawing of the VII-VII line in FIG.

Explanation of symbols

(1) Writing instrument
(2) Clip
(2a) Projection
(3) Tube
(4) Rear end
(5) Leaf spring
(6) Core shaft
(6a) Tip
(7) Front end opening
(8) (9) End
(8a) (9a) Free end
(10) Rear end face
(11) Spring locking projection
(11a) Rear end face
(12) Locking groove
(13) Through hole
(14) Disc-shaped body
(15) Side plate
(16) Mounting member
(17) Side piece
(18) Rear end
(19) Inner side
(19a) Opposite surface
(20) Recess
(21) (22) Through hole
(23) Stop pin

Claims (7)

  At the rear end of the cylindrical body such as the main body shaft or cap, fix one end of a leaf spring having an inverted L shape when viewed from the side so that the other end faces rearward, and clip the other end. An attachment structure for a clip in a writing instrument, wherein the clip is attached to the cylinder while the front end of the clip is biased toward the surface of the cylinder by supporting the rear end of the clip.   The other end of the leaf spring is formed by providing a recess on the inner surface facing the cylinder at the rear end of the clip, and inserting a free end toward the rear at the other end of the leaf spring into the recess. 2. The clip mounting structure for a writing instrument according to claim 1, wherein a rear end portion of the clip is supported by the portion.   A spring engaging protrusion that protrudes rearward with a leaf spring engaging portion is provided on the rear end surface of the cylindrical body, and the spring engagement member after passing through the through hole of the mounting member having a through hole. By locking one end of the leaf spring to the locking portion of the locking projection, the mounting member is attached to the cylinder, and the other end of the leaf spring is inserted into the recess provided at the rear end of the clip. The attachment structure of a clip in a writing instrument according to claim 1 or 2, wherein the attachment between the clip and the attachment member is prevented by attaching and preventing removal means.   The protrusion for locking the spring is formed to have a substantially quadrilateral cross section with respect to the axis, and provided with a locking groove on the left and right sides thereof, and one end of the leaf spring is cut out from the free end in a substantially U shape. The U-shaped left and right side pieces are respectively engaged with the left and right engaging grooves, whereby one end of the leaf spring is engaged with the spring engaging projection. 3. A clip mounting structure in the writing instrument according to 3.   The mounting member is formed in a substantially disk-shaped body provided with a through hole for penetrating the spring-engaging protrusion, and a side plate is connected to the left and right in the rear direction, and a lateral hole is formed in the side plate. While providing a through hole in the left and right direction at the rear end of the clip, the rear end of the clip is fitted between the left and right side plates of the mounting member, and the positions of both the through holes of the clip and the mounting member are aligned, 5. A clip mounting structure for a writing instrument according to claim 3 or 4, wherein a detachment between the clip and the leaf spring is prevented by inserting a stop pin into both the through holes as a detachment preventing means. .   The clip mounting structure for a writing instrument according to claim 5, wherein the through hole of the clip is a long hole in a side view.   The attachment structure of the clip in the writing instrument according to any one of claims 1 to 6, wherein the writing instrument is any one of a ballpoint pen, a mechanical pencil, a marking pen, and a fountain pen.

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