JP3010726U - Structure of the stopper of the plastic case - Google Patents

Abstract

(57) [Summary] [Purpose] In the closed state, the lid can be firmly closed with the same urging force as before, while the lid case can be opened with a relatively easy operation when opening the lid. Provides the structure of the part. [Structure] A closing piece having a bottom box and a lid that can be opened and closed, and having a flexible elasticity is attached so as to straddle the bottom box and the inner surface of the front wall of the lid. While the lid is closed by elastically locking the locking portion provided on the upper portion of the closing piece to the inner surface of the lid, the closing piece is pushed by pushing the operating tongue of the closing piece protruding outside the case. The lid is opened by bending the inside of the case and releasing the locked state. A notch is formed in the upper end of the front wall of the bottom box or the lower end of the front wall of the lid to receive the operating tongue of the closing piece. A locked portion for securing the locked state of the closing piece is provided on the inner surface of the front wall of the lid near the cutout.

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to the improvement of the structure of the opening / closing lid stopper part of a plastic case such as a pencil case.

[0002]

[Prior art]

 As seen in a case such as a plastic pencil case, a mouth stop portion for closing a lid which is openably and closably attached to a bottom box has conventionally a structure shown in FIGS. 7 and 8, for example.

That is, an opening D is formed substantially in the center of the front side wall C of the bottom box A, and a recess G for fixing the base portion F of the closing piece E is provided at an appropriate position on the bottom plate B near the opening D. . The closing piece E is formed of a flexible elastic material such as plastic and has a base portion F fitted into the recess G and an upright portion which rises from one end of the base portion F through a bent portion H in a substantially vertical manner. I, and has a biasing force in a direction in which the upright portion I tilts forward. In the upright portion I, an operating tongue J is formed to project substantially at the center of the front surface in the height direction, and a locking portion K slightly projecting forward is formed at the upper end of the front surface. The operating tongue J has a length such that when the base F is fitted into the recess G, the operating tongue J enters the opening D, and the tip j thereof projects from the front side wall C of the bottom box A.

The lid L attached to the rear wall (not shown) of the bottom box A via a hinge so as to be openable and closable is such that the lid L holds the locking portion K of the closing piece E on the inner surface of the front wall M thereof. A holding groove N for keeping L closed is provided.

Therefore, in this conventional mouth stopper, when the tip end j of the operating tongue J is pushed in the closed state shown in both figures, the upright portion I moves inward of the case with the upper end of the bent portion H as a fulcrum. The bending and locking portion K is disengaged from the holding groove N, and the lid L can be opened. When the pressing force of the tip j of the operating tongue J is released, the upright portion I elastically returns and the locking portion K is locked by locking the holding groove N 1 of the closed lid L.

[0006]

[Problems to be solved by the device]

 However, in such a structure, since the opening D and the holding groove N are individually formed in the bottom box A and the lid L, a certain distance must be provided between the operating tongue J and the locking portion K. Absent. Further, the upright portion I of the closing piece needs to have a bending elasticity so that the locking portion K and the holding groove N are not easily separated when the lid L is closed. For this reason, if this mouthpiece is applied to a brush case, it may not be possible to easily open the lid for children in the lower grades of elementary school.

Further, the operating tongue J has a biasing force in the forward tilting direction, and even if the operating tongue J is pushed, the lid itself is merely in a state where the internal lock is unlocked. For this reason, in the mouth stop portion of the above structure, it is necessary to open the lid L with the other hand while pressing the operating tongue J with one hand, and the pushing operation and the opening operation are operated by one hand respectively. Therefore, it becomes more difficult for the lower grade children mentioned above to operate.

In view of the above-mentioned problems of the prior art, an object of the present invention is to close the lid firmly with the same urging force as in the conventional state in the closed state, while the lid body is relatively easy to operate when the lid is opened. The purpose of the present invention is to provide a structure for a mouth stop of a plastic case that can be opened.

[0009]

[Means for solving problems]

 In order to achieve the above-mentioned object, the present invention has a bottom box and a lid that can be opened and closed, and attaches a flexible elastic closing piece so as to straddle the bottom box and the inner surface of the front wall of the lid. The locking part provided on the upper part of the closing piece is elastically locked to the inner surface of the lid to close the lid, while the operating tongue of the closing piece protruding outside the case is pushed to open the closing piece. The structure of the mouth-stop portion of the plastic case that bends inwardly of the case and releases the locked state to open the lid is characterized by adopting the following configuration.

That is, a notch is formed at the upper end of the front wall of the bottom box or the lower end of the front wall of the lid to receive the operating tongue of the closing piece. A locked portion is provided on the inner surface of the front wall of the lid near the notch to secure the locked state of the closing piece. When the notch is formed at the upper end of the front wall of the bottom box, the upper surface of the operating tongue almost comes into contact with the lower end of the front wall of the closed lid. Further, when the notch is formed at the lower end of the front wall of the lid, the upper surface of the operating tongue almost contacts the upper edge of the notch.

Further, in this structure, a projecting piece is provided on the surface of the above-mentioned closing piece located below the operating tongue piece, and an opening is formed in the front wall of the bottom box at a position corresponding to this projecting piece. It is also possible to fit the projecting piece into the opening and fix the closing piece inside the case.

Further, the closing piece has a base portion fixed to the bottom plate of the bottom box, and a rising portion that substantially abuts against the inner surface of the front wall of the bottom box and the lid, and the boundary between the base portion and the rising portion. It is also possible to make the bent part of the inwardly curved shape.

[0013]

[Action]

 In this mouth stop, the operating tongue is received in the notch, so that the operating tongue is provided at a position as close as possible to the locking part, that is, at a position farther from the bending part which is the bending fulcrum of the closing piece. Will be done. Therefore, the locking portion is released from the locked portion by pushing the operating tongue piece with a force smaller than the conventional force.

When the operating tongue is pushed, not only the locking portion is disengaged from the locked portion, but also the upper edge of the notch formed in the lower end of the front wall or the front wall of the lid body is the tongue piece. The lid is lifted by the top surface and the lid opens automatically slightly, making it easy to open the lid.

[0015]

【Example】

 Hereinafter, the present invention will be described in detail based on illustrated embodiments. 1 and 2 are an external perspective view and a cross-sectional view of a plastic pencil case having a stopper according to an embodiment of the present invention.

In the figure, reference numeral 1 is a bottom box which constitutes the above-mentioned brush case, and a box-shaped lid body 3 is attached to the upper end of the rear wall 1c which stands upright via a hinge 2 (see FIG. 2) so as to be openable and closable. There is. Reference numeral 4 denotes a closing piece that connects the bottom box 1 and the lid body 3 at a mouth stop on the front side of the writing case, and is formed in a shape described later by a flexible elastic material such as plastic.

Reference numeral 1a is a front wall of the bottom box 1, a notch portion 5 is provided at an appropriate position on the upper end thereof, and an opening 6 having a hollowed wall surface is formed below the notch portion 5. A recess 7 is formed in the bottom plate 1b of the bottom box 1 at a position close to the notch 5 and the opening 6.

On the other hand, the lid 3 is provided with a locking groove 8 on the inner surface of the lowered front wall 3 a and at a position close to the cutout portion 5 of the bottom box 1.

Similar to the conventional example, the closing piece 4 has a base portion 4a fitted into the recess 7 and a locking portion that stands up from one side end of the base portion 4a via a bent portion 4b and projects forward to the upper end. It has a rising portion 4c having a protrusion 9. The rising portion 4 has a biasing force due to elastic bending in a direction in which the rising portion 4 falls forward when pushed backward. The closing piece 4 is provided with an operating tongue piece 10 that is received in the notch 5 just below the locking protrusion 9. Since the locking groove 3a of the lid 3 and the notch 5 of the bottom box 1 are provided in close proximity to each other, unlike the conventional closing piece, the locking projection 9 and the operating tongue piece 10 are possible. It is located as close as possible.

Below the operation tongue piece 10, a rising prevention piece 11 that is inserted into the opening 6 is provided in a protruding manner. The bent portion 4b is curved inward of the base portion 4a and the rising portion 4c.

In this closing piece 4, the base 4a is fitted into the recess 7 of the bottom plate 1c, and the rising prevention piece 11 on the front of the rising portion is inserted into the opening 6 of the bottom box front wall 1a, and the operating tongue piece 1 is inserted. 0 is received in the notch 5 of the front wall 1a and is attached to the inner surface of the bottom box. In this state, when the lid 3 is closed, the locking protrusion 3a is pushed along the inner surface of the lower end of the front wall of the lid 3, and the rising portion 4c of the closing piece 4 is bent rearward, and then the locking projection 3a is locked. The locking protrusion 9 enters the groove portion 8 to lock the lid body 3 on the bottom box 1.

When the lid 3 is opened, when the operating tongue 10 is pushed, the locking protrusion 3 is disengaged from the locking groove 8 and the upper surface of the operating tongue 10 is moved as shown in FIG. Since the lower end of the front wall of the lid 3 is lifted slightly upward, the lid 3 will not be re-locked even if the pressure on the operating tongue 10 is released, and the lid 3 can be easily opened ( (See FIGS. 4 and 5).

The operating tongue 10 is provided at a position closer to the upper end of the rising portion 4c. However, even if the operating tongue 10 is repeatedly pressed, the floating preventing piece 11 is provided with the floating preventing piece 11 on the front wall opening of the bottom box 1. Since it is inserted in 6, the closing piece itself does not float up.

Further, since the bent portion 4b is curved inward in a circular arc shape, the rising portion 4c flexes and returns without difficulty, and fatigue is less likely to occur.

FIG. 6 is a front view of an essential part of a front wall of a pencil case to which a mouth stopper according to another embodiment of the present invention is applied. In this embodiment, a notch 105 for receiving the operating tongue 110 is formed at the lower end of the front wall of the lid 103, and the upper surface of the operating tongue 110 substantially contacts the upper end of the notch 105, During the opening operation, the operating tongue 110 pushes the lid 103 upward through the upper end of the notch. In the figure, reference numeral 101 is a bottom box, and 106 is an opening into which the floating prevention piece 111 is inserted.

According to this embodiment, when the depth of the bottom box 101 is constant, the rising portion of the closing piece is set longer, and the bending displacement of the rising portion with the lower portion as the fulcrum position can be performed more easily. it can.

In the above-mentioned embodiment, the case where the present invention is applied to the plastic pencil case has been described, but the present invention is not limited to this, and the bottom box and the lid can be opened and closed automatically. It can be applied as it is to the mouth stopper of various attached cases. In this case, the lid does not necessarily have to have a box shape, and has a lower front wall or a partial front wall corresponding to the front wall of the bottom box, and has a structure capable of functioning by attaching the closing piece. If so, it does not matter what the specific shape or structure is.

[0028]

[Effect of device]

 As described above, according to the present invention, the operating tongue of the closing piece is received by the notch provided at the end of the front wall of the bottom box or the lid. The operating tongue can be formed at a position closer to the position, and if the locking force due to the flexural elasticity is the same, the locking / releasing operation, that is, the unlocking can be performed with a force smaller than the conventional one.

Further, when the upper surface of the operating tongue is in a position to substantially contact the lower end of the front wall of the lid body, the lid body is pushed up at the same time when the operating tongue piece is pressed and released. Thus, the lid opening operation can be performed easily.

Further, by providing the closing piece with a lifting prevention piece and inserting the piece into the opening of the front wall of the bottom box, the closing piece will not be displaced upward from the predetermined position of the bottom box.

[Brief description of drawings]

FIG. 1 is an external perspective view of a brush case to which a mouth stopper according to an embodiment of the present invention is applied.

FIG. 2 is a cross-sectional view of the brush case of FIG.

FIG. 3 is an enlarged cross-sectional view of a state in which the locking tongue of the closing piece is pushed away from the locking groove of the lid by pressing the operating tongue.

FIG. 4 is a cross-sectional view of the brush case with the lid open.

FIG. 5 is an external perspective view of the brush case with the lid open.

FIG. 6 is a front view of a main part of a case to which a mouth stopper according to another embodiment of the present invention is applied.

FIG. 7 is a sectional view showing the structure of a conventional mouth stop.

FIG. 8 is a front view of a conventional mouth stop portion. 1,101 ・ ・ ・ ・ Bottom box 2 ・ ・ ・ ・ ・ Hinge 3,103 ・ ・ ・ ・ ・ ・ Lid 4 ・ ・ ・ ・ ・ ・ ・ ・ Closed Piece 4a: Base 4b: Bent 4c: Rise 5,105 Notch 6,106 ... Opening 7 ... Recess 8 ... Locking groove 9 ...・ ・ ・ ・ ・ Locking protrusion 10,110 ・ ・ ・ ・ ・ Operating tongue

Claims (5)

[Scope of utility model registration request] 1. A closing piece having a bottom box and a lid that can be opened and closed, and having a flexible elasticity is attached so as to straddle the inner surface of the front wall of the bottom box and the lid, and is provided on the top of the closing piece. While the locking portion is elastically locked to the inner surface of the lid to close the lid, the operating piece of the closing piece protruding outside the case is pushed to bend the closing piece inward of the case and In the structure of the mouth stop part of the plastic case that releases the locked state and opens the lid, a notch part for receiving the operating tongue of the closing piece is provided at the upper end of the front wall of the bottom box or the lower end of the front wall of the lid. A structure of a mouth-stop portion of a plastic case, which is formed, and a locked portion for securing the above-mentioned locked state of the closing piece is provided on the inner surface of the front wall of the lid near the cutout. 2. The structure of a mouth stop portion of a plastic case according to claim 1, wherein the closing piece has a projecting piece below the operating tongue piece, and the bottom box is the protruding piece of the closing piece. A structure of a mouth stop part of a plastic case, characterized in that an opening is provided in a front wall at a corresponding position, and the projecting piece of the closing piece is fitted in the opening. 3. The mouthpiece of a plastic case according to claim 1, wherein the closing piece has an upper surface of the operating tongue piece substantially in contact with a lower end of the front wall of the lid body. Structure of the department. 4. The closing piece has a base portion fixed to a bottom plate of the bottom box, and a rising portion that substantially abuts on the inner surface of the front wall of the bottom box and the lid, and the base portion and the rising portion. The structure of the stopper part of the plastic case according to any one of claims 1 to 3, wherein the bent portion at the boundary of is curved inward. 5. The locking part on the upper part of the closing piece is a locking projection, and the locked part of the lid body is a groove for locking the locking projection. The structure of the mouth stop part of the plastic case according to claim 4. [0001]