JP2017154346A - Clip structure of writing instrument and writing instrument having clip structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clip structure of a writing instrument which has a small load on an elastic member for making a clip generate clamping force, suppresses clip damage when clip opening exceeding assumption is performed, and enables the clip to obtain a substantially constant pinching force.SOLUTION: A clip body 4 of this clip structure has a base part 4b provided with a pressure contact part coming in pressure contact with an object to be pinched, a coupling part 4c extended rearward from the base part, a support object means 4d provided in the rear end part of the coupling part and supported to be rotatable by the support part, an elastic piece 4e one end part of which is coupled with the base part, and an engagement object part 4e1 formed at the rear end part of the elastic piece. A support part 3 of the mounting object body has an engagement part 3a that keeps the engagement object part engaged and releases engagement with the engagement object part 4e1 when a force of a predetermined deformation amount or more acts on the clip body 4 and a support means 3b that supports the clip body in a state of free rotation.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a clip structure for a writing instrument and a writing instrument having the clip structure.

2. Description of the Related Art Conventionally, a clip is generally provided on a cap, a shaft tube, or the like of a writing instrument. Then, the writing instrument is locked to the object to be clamped by sandwiching an edge (object to be clamped) such as a pocket or a notebook between the clip and the cap or the shaft tube.
Generally, the clip is made of a resin material, and one end portion of the clip is fixed to a cap or a shaft tube, and the other end portion is expanded with the one end portion as a center.

Therefore, when the clip sandwiches the object to be clamped, if the other end of the clip is excessively expanded, the clip main body or the one end of the clip may be damaged.
In order to prevent this damage, various clip structures have been proposed. For example, Patent Documents 1 and 2 propose a clip structure that can prevent breakage of a clip even when the other end of the clip is excessively expanded.

Specifically, the clip structure proposed in Patent Document 1 will be described with reference to FIG.
In this clip structure, the clip body 53 is caused to exert a clipping force by a flat spring-like first elastic part 52 whose rear end is supported by the shaft cylinder 51.
As a result, the writing instrument has no shaft portion for swinging the clip main body portion 53. In addition, since the front side of the first elastic part 52 is detachably connected to the clip main body part 53 by the joint part 54, the clip from the first elastic part 52 when the clip main body part 53 is opened more than necessary. The main body 53 is detached.

  Thereby, damage to the clip body 53 is prevented. Since the clip main body portion 53 that is detached from the first elastic portion 52 is supported by the second elastic portion 55 having a U-shaped leaf spring shape, the clip main body portion 53 opens greatly even if the clip main body portion 53 is removed. The joint part 54 that has come off can be easily returned to its original state without passing.

Next, the clip structure proposed in Patent Document 2 will be described with reference to FIG.
In this clip structure, two parallel bearing pieces 62 (only one side is shown) projecting from the clip main body portion 60 toward the shaft cylinder 61 are formed at the rear portion of the clip main body portion 60. A left and right symmetrical shaft hole 63 is formed, and a shaft portion 64 on the shaft tube 61 side is inserted into the shaft hole 63.
In the bearing piece 62, a slit 63 a narrower than the diameter of the shaft hole 63 extends from the shaft hole 63 to the front end of the bearing piece 62.
Further, a leaf spring 65 is provided at the rear end portion of the clip main body portion 60 and urges the rear end portion of the clip main body portion 10 in a direction away from the shaft tube 61 to cause the clip main body portion 60 to exert a clipping force. ing.

Accordingly, the clip body 60 can be expanded in the direction of the arrow C. And if the front end side of the clip main body part 60 opens more than necessary, the shaft part 64 comes out from the shaft hole 63, and at this time, the shaft part passes from the shaft hole 63 in the direction of arrow D through the slit 63a formed in the bearing piece 62. 63 is pulled out, the shaft portion 64 is smoothly detached from the shaft hole 63, and the clip main body portion 60 is smoothly detached.
As a result, the clip main body portion 60 is prevented from being bent, and the shaft portion 64 and the shaft hole 63 are less likely to be forcedly deformed.

JP2012-25040A JP 2012-25077 A

By the way, in the clip structure described in Patent Document 1, since the clip body is caused to exert a clipping force by the flat spring-like first elastic portion, the flat spring-like first elastic portion has Elastic fatigue is likely to occur, the pinching force is impaired, and there is a risk of breakage. Further, when the clip main body part is detached from the first elastic part many times, there is a possibility that elastic fatigue occurs in the U-shaped leaf spring-like elastic part provided in the joint part and breaks.
In particular, in the clip structure described in Patent Document 1, as the clip main body is expanded, the flat spring-like first elastic portion is deformed, the clamping force is increased, and a substantially constant clamping force is obtained. There was a problem that it could not be obtained.

Further, in the clip structure described in Patent Document 2, when the clip is lifted, the clip body is prevented from sliding in the axial direction due to resistance to the object to be clamped, and the shaft portion may not be detached from the shaft hole. was there. As a result, an excessive force acts on the clip main body portion, the shaft portion, and the shaft hole, and there is a risk of deformation or damage.
In particular, even in the clip structure described in Patent Document 2, there is a problem that the leaf spring is deformed as the clip main body expands, the clamping force increases, and a substantially constant clamping force cannot be obtained. It was.

  The present invention solves the above-mentioned problem, and the load on the elastic member that generates a clamping force on the clip is small, and the clip (elastic member) is damaged even when the clip is expanded beyond the assumption. It is an object of the present invention to provide a clip structure of a writing instrument that is suppressed and obtains a substantially constant clamping force, and a writing instrument including the clip structure.

  The clip structure of a writing instrument according to the present invention made to solve the above problems is a clip structure of a writing instrument comprising a clip body and a mounted body provided with a support portion for supporting the clip body, The clip main body includes at least an elastic piece having one end connected to a base and a locked portion formed at a rear end of the elastic piece, and the support portion of the attached body includes the covered portion. At least a locking portion that locks the locking portion and a support means that supports the clip body in a rotatable state, and the elastic piece deforms to deform the locking portion and the cover. The contact angle with the locking portion is changed, and the clamping force of the clip body is made substantially constant.

  With this configuration, when the clip body is gradually lifted and the degree of spread of the clip body increases, the elastic piece deforms and the contact angle between the locking portion and the locked portion changes. The elastic force (repulsive force) from the locked portion to the locking portion gradually tilts in the direction of the center line of the shaft cylinder body. That is, when the degree of expansion of the clip body is increased, the elastic force (repulsive force) of the elastic piece is inclined in the direction of the center line of the barrel body, so that the vertical component force is substantially constant, and the substantially constant clamping force Is obtained.

Here, it is desirable that the locking state between the locking portion and the locked portion is released when a clip opening amount equal to or greater than a predetermined deformation amount is generated in the clip body.
Thus, since the latching state of the latching portion and the latched portion is released, the clip main body (elastic piece) can be prevented from being damaged by an excessive load (force).

  In addition, the clip structure of the writing instrument according to the present invention made to solve the above-described problem is a writing instrument provided with a clip body and an attached body provided with a support portion that rotatably supports the clip body. A clip structure, wherein the clip body is provided at a base portion provided with a pressure contact portion that presses against an object to be sandwiched, a connecting portion extending rearward from the base portion, and a rear end portion of the connecting portion, A supported means rotatably supported by the support part; an elastic piece having one end connected to the base; and a locked part formed at the rear end of the elastic piece; The support part of the mounted body makes the locked part locked, and releases the locked state with the locked part when a clip opening amount greater than a predetermined deformation amount occurs in the clip body. And a support for rotatably supporting the clip body. It has a stage, and it is characterized in that.

In the clip structure of the writing instrument configured as described above, when the base portion (tip portion) of the clip main body is lifted, the clamping force can be generated by the elastic force of the elastic piece that can be deformed up and down.
Further, when the base portion of the clip body is lifted by an unexpected amount (when the clip body is unfolded at an unexpected angle), the clipped portion of the clip body and the support portion are engaged. The latched state with the stop portion is released, and the clip body rotates around the support means of the support portion. As a result, an excessive load (force) does not act on the clip body and the support part, and damage to the clip body (elastic piece) and the support part can be prevented.

Furthermore, even when the locked state between the locked portion and the locking portion is released, the clip body is rotatably supported by the support means of the support portion. Can be prevented.
Further, in a state in which the locked state between the locked portion and the locked portion is released, the clip body is rotated around the support means of the support portion, and the elastic piece is pushed in, thereby engaging the elastic piece. The stop portion can be locked to the locking portion of the support portion.

  As described above, the clip structure of the writing instrument according to the present invention allows the clip main body (elasticity) to be released by releasing the locked portion of the elastic piece from the locking portion of the support portion when an excessive force is applied when the clip is lifted. Can be prevented. In addition, the locked portion of the detached elastic piece is locked to the locking portion of the support portion by an easy operation, and the clip body can be returned to a state where it can be clamped.

Here, it is desirable that the connecting portion is a frame portion extending rearward from the base portion, and the elastic piece is an elastic piece formed to protrude into a space formed by the frame portion.
Further, it is desirable that the connecting portion is disposed at a central portion of the clip body, and the elastic pieces are disposed on both sides of the connecting portion.

Further, the supported means is a shaft portion provided at the rear end portion of the connecting portion, the support means is a recess portion provided at the rear end portion of the support portion, and the shaft portion is rotated into the recess portion. It is desirable to be in a freely fitted state.
Further, the supported means is a through hole provided on the side surface of the rear end portion of the connecting portion, the support means is a shaft portion provided at the rear end portion of the support portion, and the shaft portion is formed in the recess. It is desirable to be in a state of being fitted so as to be rotatable.

Further, the locking position between the locking portion and the locked portion is positioned forward from the support position of the supported means of the clip body and the supporting means of the support portion, and the locking portion and the locked position The connecting position between the elastic piece and the base is positioned forward from the locking position with the stopper, and further, the distance dimension from the support position to the locking position is from the locking position to the connecting position. Desirably smaller than the distance dimension.
In the case of such a configuration, the amount of deformation of the elastic piece becomes small as the clip body is lifted, so that the load on the elastic piece that generates the clamping force is reduced, and it is damaged even if it is repeatedly elastically deformed. Less.
Moreover, since the deformation amount of the elastic piece is small, an increase in the clamping force with respect to the opening amount of the clip can be suppressed, and a substantially constant clamping force can be obtained.

  According to the present invention, the load on the elastic member that generates a clamping force on the clip is small, and even when the clip is expanded more than expected, breakage of the clip is suppressed, and a substantially constant clamping force is obtained. The resulting clip structure can be obtained.

FIG. 1 is a perspective view showing a clip structure of a writing instrument according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of FIG. 3A and 3B are views showing the clip body, in which FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along the line II of FIG. 4A and 4B are views showing the shaft cylinder main body, wherein FIG. 4A is a plan view and FIG. 4B is a side view. FIG. 5 is a perspective view showing a state where the clip body of the clip structure of the writing instrument shown in FIG. 1 is expanded. 6 is a cross-sectional view of FIG. FIG. 7 is a schematic diagram for explaining the operation and action of the clip structure of the writing instrument shown in FIG. FIG. 8 is a perspective view showing a clip structure of a writing instrument according to the second embodiment of the present invention. FIG. 9 is a cross-sectional view of FIG. 10A and 10B are views showing the clip body, in which FIG. 10A is a plan view and FIG. 10B is a cross-sectional view taken along line II-II in FIG. FIGS. 11A and 11B are views showing the shaft cylinder main body, where FIG. 11A is a plan view and FIG. 11B is a side view. 12 is a perspective view showing a state in which the clip body of the clip structure of the writing instrument shown in FIG. 8 is expanded. 13 is a cross-sectional view of FIG. FIG. 14 is a perspective view showing a clip structure of a writing instrument according to the third embodiment of the present invention. 15 is a cross-sectional view of FIG. FIG. 16 is a perspective view showing a state where the clip body of the clip structure of the writing instrument shown in FIG. 14 is expanded. 17 is a cross-sectional view of FIG. FIG. 18 is a diagram illustrating the relationship between the opening amount of the clip and the clamping force. FIG. 19 shows a conventional clip structure. FIG. 20 is a diagram showing another conventional clip structure.

Hereinafter, embodiments (first to third embodiments) of the present invention will be described with reference to the accompanying drawings. First, with reference to FIG. 1 thru | or FIG. 6, the clip structure of the writing instrument which concerns on the 1st Embodiment of this invention is demonstrated.
As shown in FIGS. 1 and 2, the clip structure 1 includes a shaft tube main body 2 and a support portion 3 disposed on the outer peripheral surface of the shaft tube body 2 perpendicular to the center line l of the shaft tube body 2. And a long clip body 4 that is rotatably attached to the support portion 3.
In this embodiment, the shaft cylinder main body 2 is illustrated as an attached body to which the clip main body 4 is attached. The shaft cylinder main body 2 includes a shaft cylinder of a writing instrument and a shaft cylinder of a cap. Moreover, the to-be-attached body in this invention is not limited to an above-described axial cylinder, but broadly includes what the clip main body 4 is attached to.

The clip body 4 will be specifically described with reference to FIG.
The clip body 4 includes a base portion 4b in which a pressing portion 4a that presses against an object to be clamped is formed on the lower surface of the tip portion.
The clip body 4 is bifurcated from the base portion 4b, and a frame portion (connecting portion) 4c extending rearward and a bifurcated frame at the rear end portion of the frame portion 4c. The shaft part 4d which connects the rear-end part of the part 4c is provided.
The shaft portion 4d extends in a direction orthogonal to the longitudinal direction of the clip body 4 and has a circular cross-sectional shape.

Further, the clip body 4 is provided with an elastic piece 4e in a space S formed by a frame portion (connecting portion) 4c that branches into a bifurcated shape, and a locked portion 4e1 is provided at the rear end thereof. It has been.
That is, the elastic piece 4e is formed so as to protrude into the space S, and the space S is formed on both the left and right sides and the rear end side of the elastic piece 4e, and the elastic piece 4e is connected to the front end (base 4b). The coupling part 4e2) is formed to be swingable with the fulcrum as a fulcrum.
Moreover, this to-be-latched part 4e1 is formed as what is called a step part as shown in FIG.3 (b), and is formed so that it may be latched by the support part 3. FIG.
The clip body 4 is integrally formed by resin molding.

Next, based on FIG. 4, the said support part 3 is demonstrated concretely.
The support portion 3 is erected from the outer peripheral surface of the shaft tube main body 2 and extends in parallel with the center line l of the shaft tube main body 2.
At the front end portion of the support portion 3, a claw-like locking portion 3 a that contacts and is locked with the locked portion 4 e 1 is formed. Further, a recessed portion 3b into which the shaft portion 4d is rotatably fitted is formed at the rear end portion of the support portion 3.
The recess 3b is formed with an opening 3b1 for inserting the shaft 4d. Moreover, the said support part 3 is shape | molded integrally with the axial cylinder main body 2 by resin molding.

In addition, as shown in FIG. 2, when the portion to be locked 4e1 is locked to the locking portion 3a and a force greater than a predetermined amount of deformation is applied in the P1 direction (the clip body 4 is set to a predetermined level). In this case, the locking of both is released as shown in FIGS. 5 and 6.
Therefore, when a force greater than a predetermined amount of deformation is applied in the P1 direction (when the clip body 3 is expanded more than a predetermined opening), the locking of both is released, and the clip body 4 is centered on the shaft portion 4d. Rotate. Therefore, the action of a large load (external force) is suppressed on the clip body 4 (elastic piece 4e), and deformation and breakage of the clip body 4 (elastic piece 4e) are suppressed.

To attach the clip body 4 to the support portion 3, first, the shaft portion 4d of the clip body 4 is press-fitted from the opening 3b1 of the support portion 3, and the shaft portion 4d is fitted into the recess 3b. The state shown in FIG.
Thereafter, an external force is applied in the P2 direction from the state shown in FIGS. 5 and 6, the clip body 4 is rotated about the shaft portion 4d, and the locked portion 4e1 is locked to the locking portion 3a. The state shown in FIGS.
Thereby, attachment of the clip main body 4 with respect to the axial cylinder main body 2 (support part 3) is completed.

Next, the operation and action of the clip structure 1 will be described.
As shown in FIGS. 1 and 2, when a force of a predetermined deformation amount or less acts in the P1 direction in a state where the locking portion 3a locks the locked portion 4e1, the clip body 4 is set to a predetermined level. When the opening is expanded within the opening range), the state where the locked portion 4e1 is locked to the locking portion 3a is maintained, and the clip body 4 rotates around the shaft portion 4d.

At this time, one end portion (connecting portion 4e2) of the elastic piece 4e is connected to the base portion 4b, and the other end portion of the elastic piece 4e is locked to the locking portion 3a. The elastic piece 4 is deformed and generates an elastic force.
That is, when a document, clothing, or the like is sandwiched between the press contact portions 4a, the clip body 4 is lifted, and the elastic piece 4e is deformed to obtain a clamping force. In addition, since the frame part 4c rotates centering on the axial part 4d, it does not deform | transform.

When the clip body 4 is gradually lifted and the degree of spread of the clip body 4 increases, the elastic piece 4 moves from the state indicated by the solid line to the state indicated by the two-dot chain line as schematically shown in FIG. The contact angle between the locking portion and the locked portion changes, and the elastic force (repulsive force) from the locked portion 4e1 to the locking portion 3a gradually increases in the direction of the center line of the shaft body 2 lean to l.
Specifically, when the degree of spread of the clip body 4 is increased in the P1 direction, the direction of the elastic force (repulsive force) changes from the solid X1 direction to the X2 direction, as indicated by a two-dot chain line. On the other hand, the force (clamping force) for expanding the clip body 4 is a vertical component force in the X1 direction and a vertical component force in the X2 direction with respect to the clip body 4.
Therefore, when the degree of expansion of the clip body 4 is increased, the elastic force (repulsive force) of the elastic piece 4e is inclined in the direction of the center line l of the shaft cylinder body 2, so that the vertical component force is substantially constant and is substantially A constant clamping force can be obtained.

When a force greater than a predetermined amount of deformation is applied in the P1 direction (when the clip body 3 expands more than a predetermined opening), the locking relationship between the locked portion 4e1 and the locking portion 3a is The clip body 4 is released and pivoted about the shaft portion 4d.
Therefore, a large load (external force) that damages the elastic piece 4e is prevented from acting on the elastic piece 4e, and deformation and breakage of the clip body 4 (elastic piece 4e) are suppressed.

  Further, as shown in FIG. 2, the locking position between the locking portion 3a and the locked portion 4e1 is located forward from the support position between the shaft portion 4d of the clip body 4 and the concave portion 3b of the support portion 3. In addition, the connecting position 4e2 between the elastic piece 4e and the base part 4b is located in front of the locking position between the locking part 3a and the locked part 4e1. Further, a distance dimension L1 from the support position to the locking position is smaller than a distance dimension L2 from the locking position to the coupling position.

  Since it is configured in this way, the amount of deformation of the elastic piece 4e is smaller than the amount of lifting of the tip of the clip body 4, so the load on the elastic piece that generates the clamping force is reduced (one end is fixed). The load is smaller than when the tip of the clip is lifted), and even if it is repeatedly elastically deformed, it is less likely to break. Moreover, since the deformation amount of the elastic piece is small, an increase in the clamping force with respect to the opening amount of the clip can be suppressed, and a substantially constant clamping force can be obtained.

Even when the locking relationship between the locked portion 4e1 and the locking portion 3a is released, the clip body 4 is supported by the recess 3b of the support portion 3 and the shaft portion 4d. There is no loss from coming off part 3.
Further, since the clip body 4 rotates (swings) around the concave portion 3b of the support portion 3, even if the locked portion 4e1 of the elastic piece 4e and the locking portion 3a of the support portion 3 are unlocked, By rotating the clip body 4 in the direction P2 shown in FIGS. 5 and 6, the original state (the state shown in FIGS. 1 and 2) can be easily restored.

  As described above, the material of the clip and the shaft can be a resin material exhibiting elasticity, a steel material, and other resin and metal specifications that are usually used for writing instruments.

  Next, a writing instrument clip structure according to a second embodiment of the present invention will be described with reference to FIGS. Note that members that are the same as or correspond to those shown in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.

The clip body 4 used in the clip structure 10 according to the second embodiment has a U-shaped cross section as shown in FIG. And the space part S is formed in the upper surface, and the elastic piece 4e is provided in the space part S. As shown in FIG.
In other words, the clip body 4 includes a frame portion (connecting portion) 4c that is bifurcated from the base portion 4b and extends rearward.
Moreover, the to-be-latched part 4e1 is provided in the rear-end part of the elastic piece 4e. As shown in FIGS. 8 and 10, through holes 4 f are formed on both sides of the rear portion of the side surface of the frame portion (connecting portion) 4 c of the clip body 4.

  On the other hand, as shown in FIG. 11, the support portion 3 is formed upright from the outer peripheral surface of the shaft tube main body 2, and a claw-like (hook-like) locking portion 3 a is provided at the upper end portion thereof, A recessed portion 3d is formed behind the support portion 3 so that the support portion 3 is easily deformed rearward. In addition, the support portion 3 is formed with a pair of shaft portions 3 c extending in a direction orthogonal to the center line 1 of the shaft tube main body 2.

A tapered surface 3c1 is formed on the upper outer peripheral surface of the shaft portion 3c.
By the taper surface 3c1, the clip body 4 is pushed down from above, so that the shaft portion 3c can be easily fitted into the through hole 4f.

In this second embodiment, in order to attach the clip body 4 to the support portion 3, the clip body 4 is pushed down from above the shaft portion 3c by the tapered surface 3c1 of the shaft portion 3c. The side surfaces of the shaft portion 3c are slightly expanded, and the shaft portion 3c is rotatably fitted in the through hole 4f. As a result, the state shown in FIGS. 12 and 13 is obtained.
Thereafter, a force is applied in the P2 direction from the state shown in FIGS. 12 and 13, the clip body 4 is rotated about the shaft portion 3c, and the locked portion 4e1 is locked to the locking portion 3a. The state shown in FIGS. Thereby, attachment of the clip main body 4 with respect to the axial cylinder main body 2 (support part 3) is completed.

Next, the operation and action of the clip structure 1 will be described.
As shown in FIGS. 8 and 9, when a force of a predetermined deformation amount or less acts in the P1 direction in a state where the locking portion 3a locks the locked portion 4e1 (the clip body 4 has a predetermined When the opening is expanded within the opening range), the state where the locked portion 4e1 is locked to the locking portion 3a is maintained, and the clip body 4 rotates around the shaft portion 3c.

At this time, since one end of the elastic piece 4e is connected to the base 4b and the other end of the elastic piece 4e is locked to the locking portion 3a, the elastic piece 4e is deformed as the clip body 4 is expanded. And generates an elastic force.
That is, when a document, clothing, or the like is sandwiched between the press contact portions 4a, the clip body 4 is lifted and the elastic piece 4e is deformed to obtain a clamping force. In addition, since the upper surface and side surface of the clip main body 4 rotate around the shaft portion 4d, they are not deformed.

  Then, when the clip body 4 is gradually lifted and the degree of expansion of the clip body 4 increases, the elastic piece 4e is further deformed as described in the first embodiment, and the locking portion 4e1 is engaged with the locking portion. The elastic force (repulsive force) for 3a is such that the contact angle between the locking portion 4e1 and the locked portion 3a changes, and gradually tilts in the centerline direction 1 of the shaft barrel body 2, so that a substantially constant clamping force is applied. can get.

When a force greater than a predetermined amount of deformation is applied in the P1 direction (when the clip body 3 expands more than a predetermined opening), the locking relationship between the locked portion 4e1 and the locking portion 3a is The clip body 4 is released and rotates around the shaft portion 3c.
Therefore, a large load (external force) that damages the elastic piece 4e is prevented from acting on the elastic piece 4e, and deformation and breakage of the elastic piece 4e are suppressed.

  Further, as in the first embodiment, since the deformation amount of the elastic piece 4e is smaller than the lifting amount of the tip end portion of the clip body 4, the load on the elastic piece that generates the clamping force is reduced (one end). The load becomes smaller compared to the case of lifting the tip of the clip to which is fixed), and damage is reduced even if it is repeatedly elastically deformed. Moreover, since the deformation amount of the elastic piece is small, an increase in the clamping force with respect to the opening amount of the clip can be suppressed, and a substantially constant clamping force can be obtained.

Further, when the locking relationship between the locked portion 4e1 and the locking portion 3a is released, the shaft portion 3c of the support portion 3 and the through hole 4f are fitted, so that the clip body 4 is There is no loss from the support part 3.
Further, since the clip body 4 opens and closes around the shaft portion 3c of the support portion 3, even if the locked portion 4e1 of the elastic piece 4e and the lock portion 3a of the support portion 3 are unlocked, FIG. By rotating the clip body 4 in the P2 direction shown in FIG. 13, the original state (the state shown in FIGS. 8 and 9) can be easily restored.

  Next, the clip structure of the writing instrument according to the third embodiment of the present invention will be described with reference to FIGS. Note that members that are the same as or correspond to those shown in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.

As shown in FIG. 14, in the clip structure 20 according to the third embodiment, a connecting portion 4c extending in the axial direction is formed at the center in the width direction, and elastic pieces 4e are formed on both sides of the connecting portion 4c. There is a feature in that it is provided.
Note that through holes 4f are formed on both sides of the side surface of the rear end portion of the connecting portion 4c, and a locked portion 4e1 is provided at the rear end portion of the elastic piece 4e.

Further, in the third embodiment, as in the second embodiment, as shown in FIG. 15, the support portion 3 is formed upright from the outer peripheral surface of the barrel body 2, and its upper end portion Is provided with a claw-like (hook-like) locking portion 3a, and a gap (concave portion) 3e is formed behind the support portion 3 so that the support portion 3 is easily deformed rearward. .
In addition, the support portion 3 is formed with a pair of shaft portions 3 c extending in a direction orthogonal to the center line 1 of the shaft tube main body 2.

Also in the third embodiment, in order to attach the clip body 4 to the support portion 3, the clip body 4 is pushed down from above the shaft portion 3c, so that the shaft portion 3c is rotated into the through hole 4f. Fit as possible. As a result, the state shown in FIGS. 16 and 17 is obtained.
Thereafter, a force is applied in the P2 direction from the state shown in FIGS. 16 and 17, the clip body 4 is rotated around the shaft portion 3c, and the locked portion 4e1 is locked to the locking portion 3a. The state shown in FIGS. 14 and 15 is obtained. Thereby, attachment of the clip main body 4 with respect to the axial cylinder main body 2 (support part 3) is completed.

Next, the operation and action of the clip structure 20 will be described.
As in the second embodiment, as shown in FIGS. 14 and 15, in the state where the locking portion 3a locks the locked portion 4e1, a force of a predetermined deformation amount or less acts in the P1 direction. When this occurs (when the clip body 4 is expanded within a predetermined opening range), the state where the locked portion 4e1 is locked to the locking portion 3a is maintained and the clip body 4 is pivoted. It rotates around the part 3c.

At this time, since one end of the elastic piece 4e is connected to the base 4b and the other end of the elastic piece 4e is locked to the locking portion 3a, the elastic piece 4e is deformed as the clip body 4 is expanded. And generates an elastic force.
That is, when a document, clothing, or the like is sandwiched between the press contact portions 4a, the clip body 4 is lifted and the elastic piece 4e is deformed to obtain a clamping force. In addition, since the upper surface and side surface of the clip main body 4 rotate around the shaft portion 3c, they are not deformed.

  When the clip body 4 is gradually lifted and the degree of spread of the clip body 4 increases, as described in the first and second embodiments, the elastic piece 4e is further deformed, and is engaged from the locked portion 4e1. The elastic force (repulsive force) with respect to the stop portion 3a is gradually inclined in the center line direction 1 of the shaft cylinder main body 2, and a substantially constant clamping force is obtained.

When a force greater than a predetermined amount of deformation is applied in the P1 direction (when the clip body 3 expands more than a predetermined opening), the locking relationship between the locked portion 4e1 and the locking portion 3a is The clip body 4 is released and rotates around the shaft portion 3c.
Therefore, a large load (external force) that damages the elastic piece 4e is prevented from acting on the elastic piece 4e, and deformation and breakage of the elastic piece 4e are suppressed.

  Also in the third embodiment, similarly to the first and second embodiments, the amount of deformation of the elastic piece 4e is smaller than the amount by which the tip of the clip body 4 is lifted. The load on the elastic piece to be generated is reduced (compared to a case where the tip of the clip with one end fixed is lifted), and even if it is repeatedly elastically deformed, it is less likely to break. Moreover, since the deformation amount of the elastic piece is small, an increase in the clamping force with respect to the opening amount of the clip can be suppressed, and a substantially constant clamping force can be obtained.

Further, when the locking relationship between the locked portion 4e1 and the locking portion 3a is released, the shaft portion 3c of the support portion 3 and the through hole 4f are fitted, so that the clip body 4 is There is no loss from the support part 3.
Further, since the clip body 4 opens and closes around the shaft portion 3c of the support portion 3, even if the locked portion 4e1 of the elastic piece 4e and the lock portion 3a of the support portion 3 are unlocked, FIG. By rotating the clip body 4 in the P2 direction shown in FIG. 17, the original state (the state shown in FIGS. 14 and 15) can be easily restored.

The clamping force of the clip structure according to the present invention was verified.
As an example, the support portion and the clip body were formed in the shapes shown in FIGS. 3 and 4 and the dimensions were as follows. That is, t1 is 50 mm, t2 is 12.5 mm, t3 is 25 mm, t4 is 4 mm, t5 is 8 mm, the material is polypropylene, and the clip body is formed by integral resin molding. Moreover, t6 was 10 mm, the material was polypropylene, and the support part was formed integrally with the shaft cylinder body by integral resin molding.
And the front-end | tip part (press-contact part) of the clip main body was lifted in the P1 direction, the end part (press-contact part) of the clip main body 3 at that time measured the opening amount, and the clamping force of the clip.

  Specifically, using a push-pull gauge (Nidec Symposium Digital Force Gauge FGP-50), the clamping force relative to the lifting amount (opening amount) of the clip is measured, and the lifting amount (opening amount) The measurement was performed using a dial gauge. The result is shown in FIG.

Further, as a comparative example, measurements were also made on a resin clip integrally formed with the shaft (Comparative Example 1) and a clip with a metal leaf spring (Comparative Example 2).
Comparative Example 1 is UMN-105 manufactured by Mitsubishi Pencil Co., Ltd.
Comparative Example 2 was SN-118 manufactured by Mitsubishi Pencil Co., Ltd.

As a result of the verification, as shown in FIG. 18, in Comparative Examples 1 and 2, an increase in the clamping force was observed as the clip opening amount increased.
On the other hand, in the example, the increase in the clamping force was small even when the clip opening amount was large, and a substantially constant clamping force was obtained.

In this embodiment, the locked portion of the elastic piece moves on the locking portion of the support portion as the clip body is opened and closed. Therefore, the direction of the force received from the locking portion also moves from the vertical direction to the parallel direction with respect to the center line of the shaft cylinder main body. As a result, it is presumed that the clip clamping force (force applied in the vertical direction from the press contact portion) is small and a substantially constant clamping force is obtained.
In addition, when the distance dimension between the shaft part 4d of the clip body and the locked part is smaller than the distance dimension from the locking part to the connecting part of the elastic piece, the elastic piece Since the angle of deformation is small, it is presumed that the change in elastic force is small.

1, 10, 20 Clip structure 2 Shaft cylinder body 3 Support portion 3a Locking portion 3b Recessed portion (support means)
3b1 Opening 3c Shaft (support means)
3c1 Tapered surface 3d Recess (gap)
4 clip body 4a pressure contact part 4b base part 4c frame part (connection part)
4d Shaft (supported means)
4e Elastic piece 4e1 Locked portion 4e2 Connection portion 4f Through hole (supported means)
L1 Distance dimension from the support position to the locking position L2 Distance dimension from the locking position to the coupling position l Centerline S of the barrel body

Claims (8)

  A clip structure of a writing instrument comprising a clip body and a mounted body provided with a support portion for supporting the clip body, and the clamping force relating to the clip body and the writing instrument is substantially reduced even when deformation due to clip opening occurs. A clip structure of a writing instrument characterized by being constant. A clip structure of a writing instrument comprising a clip body and a mounted body provided with a support portion for supporting the clip body,
The clip body has at least an elastic piece having one end connected to a base and a locked part formed at a rear end of the elastic piece,
The support portion of the mounted body has at least a locking portion that locks the locked portion, and a support means that supports the clip body in a rotatable state.
The clip structure for a writing instrument, wherein the elastic piece is deformed to change a contact angle between the locking portion and the locked portion, so that a clamping force of the clip body is substantially constant.   The writing instrument according to claim 1 or 2, wherein when the opening amount of the clip more than a predetermined deformation amount is generated in the clip body, the locking state between the locking portion and the locked portion is released. Clip structure. A clip structure of a writing instrument comprising a clip body and a mounted body provided with a support portion that rotatably supports the clip body,
The clip body is
A base portion provided with a press-contact portion that press-contacts the object to be sandwiched, a connecting portion extending rearward from the base portion, and a rear end portion of the connecting portion, and rotatably supported by the support portion. A supported means, an elastic piece having one end connected to the base, and a locked part formed at the rear end of the elastic piece;
The support portion of the mounted body is
A locking portion for releasing the locking state with the locked portion when the locked portion is in a locked state and a clip opening amount of a predetermined deformation amount or more is generated in the clip main body; and the clip main body A support means for supporting the pivotable state in a rotatable state;
Having
A clip structure for a writing instrument. The connecting portion is a frame portion extending rearward from the base portion;
5. The clip structure for a writing instrument according to claim 4, wherein the elastic piece is an elastic piece formed so as to protrude into a space formed by the frame portion. The supported means is a shaft provided at the rear end of the connecting portion, and the supporting means is a recess provided at the rear end of the support;
The clip structure for a writing instrument according to claim 4, wherein the shaft portion is rotatably fitted in the recess. The supported means is a through hole provided in the side surface of the rear end of the connecting portion, and the support means is a shaft provided in the rear end of the support;
The clip structure for a writing instrument according to claim 4, wherein the shaft portion is rotatably fitted in the recess.   A writing instrument comprising the clip structure according to any one of claims 1 to 7.

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