JPH053651Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a twist latch used as a fastener for bag lids, belts, etc., for example.

<Prior Art> Conventionally, various improvements have been made to twist latches to produce a click feeling when the knob is twisted. For example, U.S. Pat. No. 3,514,820 discloses a main body having a bearing portion, and a knob having a shaft rotatably supported by the bearing portion, and a lower end of the bearing portion is provided with an opposing shaft through which the shaft of the knob passes. A frame-shaped elastic piece is provided, a downward truncated conical tapered surface is provided around the shaft portion of the knob that passes through both elastic pieces, and the opposing surfaces of both elastic pieces are brought into contact with this tapered surface. The knob is always urged toward the bearing part by the elastic force of the handle, and a cross-shaped groove is carved on the top surface of the main body with the bearing part at the center, and a strip on the bottom surface of the proximal end of the knob fits into this groove. A twist latch having a protruding rib is known. Therefore, with this twist latch, when the knob is twisted, the rib of the knob rides on the top surface of the main body and rotates while lifting slightly.
Every time you twist it 90 degrees, the ribs and grooves fit together, creating a clicking sensation.

<Problem that the invention aims to solve> However, with the conventional twist latch, when the knob is twisted, the knob constantly rises in the direction of removal.
The elastic piece is prone to fatigue, causing play when a load is applied in the direction of removal, and not only does the shaft of the knob become easier to remove, but the rotational resistance when twisting the knob decreases.
There is a risk that the sense of moderation may decline.

<Means for Solving the Problems> Therefore, the present invention provides a twist latch consisting of a main body having a bearing portion and a knob having a shaft rotatably supported by the bearing portion. Elastic pieces facing each other are provided, and around the shaft portion of the knob that passes within the spacing between the two elastic pieces, there is a close contact part that comes into close contact with the opposing surfaces of the two elastic pieces, and a Expanded portions are provided in succession alternately to press the facing surfaces outward to widen the facing distance, and the bearing portion is provided with a portion behind each elastic piece such that the elastic pieces are bent outward excessively by the expanded portions. It is characterized by the provision of a protrusion that prevents it from being caught.

<Example> Below, an example of the present invention will be explained based on the drawings. In Figures 1 to 12, numeral 1 indicates a plastic twist latch used as a fastener for bag lids, belts, etc. , this latch 1 consists of a latch body 3 having a bearing part 2 and a knob 5 having a shaft 4 rotatably supported on the bearing part 2, 6 is a mounting plate of the body 3, and H is a knob 5. Indicate the hole for each partner to pass through.

The main body 3 is box-shaped with an open bottom and long from side to side, and has a rectangular bearing part 2 at the center of the upper wall, through which the shaft 4 of the knob 5 passes, and at the lower end of this bearing part 2. Elastic pieces 7, 7 are provided facing each other. Further, at the lower end of the main body 3, a plate-shaped bottom portion 8 extending from side to side is provided.
A pair of left and right legs 9, 9 facing each other are vertically disposed on the lower surface of the bottom 8, and a vertically continuous sawtooth locking step 10 is provided on the outer surface of both legs 9.

Both elastic pieces 7 are thin plate-shaped opposite to each other in the width direction of the main body 3, and are continuous to the lower end of the bearing portion 2 at the upper hinge portion. The upper part 7a of the elastic piece 7 is inclined diagonally downward in an inverted V-shape, and a lower part 7b hanging down from the upper part 7a projects inward from the lower end of the bearing part 2. In this embodiment, the connecting piece 1 is formed by bending each end of the opposing elastic pieces 7 into a semicircular shape.
1, and both elastic pieces 7 are provided with recesses facing protrusions 12, 12 protruding from the inner surface of the main body 3 to prevent both elastic pieces 7 from bending outward more than necessary. are doing.

Furthermore, notches 13, 13 extending in the length direction of the main body 3 are provided at opposing edges of the bearing portion, and a shallow circular guide groove 14 is provided from the upper surface of the main body 3 at the edge of the hole.

The lower surface of the knob 5 is approximately equal to the upper surface of the main body 3, and a disc-shaped stepped portion 15 that fits into the guide groove 14 is raised at approximately the center of the lower surface.
The shaft 4 is vertically installed from the center of the shaft 5. Around the shaft portion 16 that passes midway along the height of the shaft 4, that is, within the spacing l between the elastic pieces 7, 7, the opposing surfaces 1 of both elastic pieces 7
Close contact parts 18 that come in close contact with elastic pieces 7 and expansion parts 19 that press outward the facing surfaces 17 of both elastic pieces 7 and widen the facing distance l are provided in succession alternately. Here, the cross-sectional shape of the shaft portion 16 is a regular polygon, for example, a regular quadrangle, and the distance between the opposite sides is approximately equal to the facing distance 1 between both elastic pieces 7, and the surface constituting this side is the close contact portion 18. The diagonal rearwardly facing edge is defined as the extended portion 19.

Therefore, since the distance between the two extended portions 19 that face each other is longer than the facing interval l between the two elastic pieces 7, the shaft portion 16
When the elastic pieces 7 rotate, the opposing surfaces 17 of the elastic pieces 7 are pressed outward by the expansion parts 19 . Therefore, both elastic pieces 7 bend outward against the elastic force, and are bent to the maximum at the position where the opposing surfaces 17 of both elastic pieces 7 and the extended portion 19 abut (FIG. 12b). When this position is exceeded, both elastic pieces 7 are restored by the elastic force, and this force acts on the shaft portion 16 as a rotational force, which further rotates the shaft portion 16 and causes the other two contact portions 18 facing away from each other to rotate. is brought into close contact with the facing surfaces 17 of both elastic pieces 7, so that the rotation of the shaft portion 16 is stopped (FIG. 12c). Therefore, each time the knob 5 is twisted, the close contact portion 18 and the expanded portion 19 facing the back alternately come into contact with the opposing surfaces 17 of both elastic pieces 7, resulting in a click feeling.

Further, the base end 20 of the shaft 4 forms a downward truncated cone shape, and the inclined upper portions 7a of both elastic pieces 7 abut around this base end 20, so that a suction force is generated on the shaft 4. There is. Then, the tip 21 of the shaft 4 is extended wider than the opposing distance l between the elastic pieces 7, and the wing portions 2 extend from both ends in the length direction of the knob 5.
2 and 22 are extended to prevent the shaft 4 from coming off.
Therefore, in order to pass the shaft 4 of the knob 5 through the bearing part 2 of the main body 3, it is sufficient to align the wing parts 22 with the notches 13 of the bearing part 2 and press them firmly, and the back surface of the shaft tip part 21 is elastic. It comes into contact with the lower end of the piece 7, and the shaft will not come off even when the knob 5 is twisted in any direction.

On the other hand, the plate has a thin flat plate shape that is long from side to side, and has through holes 2 at both ends through which the legs 9 of the main body 3 pass.
3 and 23 are opened, and claws 24 and 24 that engage with the locking steps 10 of the leg portions 9 are provided inwardly protruding from the through holes 23.

Next, to explain the usage condition, for example, as shown in FIGS. 13 and 14, the handbag 2
It is used for the cap of 5 and the buckle part of belt 26.

For example, in the case of a handbag 25, the latch 1 is attached to the side of the bag body 27, and a corresponding hole H is formed in the lid 28 through which the knob 5 passes.
To install latch 1, attach bag body 2.
Attachment holes 3 through which the legs 9 of the main body 3 pass through the fabric 29 of 7.
0 and 30, pass both legs 9 through these mounting holes 30, and apply the plate 6 from the back side of the fabric 29.
The locking step parts 10 of both leg parts 9 are deeply engaged with the claws 24 of the plate 6, and the cloth 29 is sandwiched between the plate 6 and the bottom part 8 of the main body 3 and fixed. Also, one piece of the mating hole H is a long rectangle like the knob,
Here, it will be opened horizontally.

On the other hand, when closing the lid 28, align the mating hole H with the knob 5 of the latch 1 while closing the lid 28.
All you have to do is thread it through as deep as you can, pick the knob 5 protruding from the partner hole H, and twist it 90 degrees in either direction.
When the knob 5 is twisted, the shaft portion 7 of the knob 5 snaps into both elastic pieces 7.
rotates while slidingly contacting the facing surface 17 within the opposing distance l, and the opposing distance l between the two elastic pieces 7 gradually expands due to the opposing extended portions 19, so rotational resistance also increases, and the opposing opposing surfaces 17 The rotational resistance is maximum at the position where the portion 19 abuts the opposing surface 17 (the position where the knob 5 is twisted by 45 degrees) (FIG. 12b). When this position is exceeded, rotational force is applied to the shaft portion 16, so the rotational resistance changes from positive to negative, and the knob 3 begins to rotate by itself.
Then, at the position rotated by 90 degrees, the other contact portions 18 facing back again come into close contact with the facing surfaces 17 of both elastic pieces, so the rotation is stopped (Figs. 11 and 12).
Figure c). In this position, the knob 5 and the mating hole H intersect in the shape of a cross, so that the short side of the mating hole H hangs over the long side of the knob 5 to prevent it from coming off, and the lid 28 of the handbag 25 is locked in the closed position. .

On the other hand, to open the locked lid 28, just twist the knob 5 90 degrees in either direction again, and when you twist the knob 5 90 degrees, the direction of the knob 5 and the mating hole H match (the 10th Figure 11a). Therefore, the lid 28
All you have to do is open the hole H and remove it from 5.

In this manner, when twisting the knob 5, the rotational resistance changes depending on the rotation angle, and the operator can feel a click sensation due to the reaction received from the knob 5.

In the embodiment, when the knob 5 rotates, a rotational force in the opposite direction acts in the initial stage, so that the knob 5 does not rotate easily due to external force or the like. or,
When the knob 5 and the mating hole H intersect, an external force is applied to the knob 5 in the direction of removal, but in this position, the wing portion 22 of the tip 21 of the knob 5 intersects both elastic pieces 7, so This wing portion 22 prevents the shaft from coming off.

15 to 18 show another embodiment of the twist latch 1, in which the area around the shaft portion 16' of the knob 5 and the opposing surface 1 of the elastic piece 7' are shown.
7' are provided with recesses and recesses that fit into each other to create a clicky feel.

That is, on the facing surfaces 17' of both elastic pieces 7', semicircular protrusions 31, 31 protruding inward are provided facing each other. Further, the cross-sectional shape of the shaft portion 16' of the knob 5 is circular, and the diameter of this circle is set to the above-mentioned protrusion 31.
Semicircular concave close portions 18' into which the protrusions 31 are fitted are provided on the outer peripheral surface with a phase difference of 90 degrees, and both rearwardly facing close portions 18 The protrusions 31 facing each other at a distance of
be approximately equal to the opposing distance l'.

Therefore, a convex expanded portion 19' is formed between the adjacent close contact portions 18', and the distance between the two rearwardly facing expanded portions 19' is longer than the facing distance l' between the opposing protrusions 31. The protrusions 31 of both elastic pieces 7' are pressed outward by both expanded portions 19' facing backwards, and the opposing distance l' between both elastic pieces 7' is expanded. In this manner, by rotating the shaft 4', the concave close portions 18' and the convex extended portions 19', which are alternately and continuously provided around the shaft portion 16', are caused to contact the projections 31 of both elastic pieces 7'. The alternating sliding contact produces a clicking sensation.

The tip 21' of the shaft 4 is provided with a vertical groove 32 which is open vertically and which is continuous with the concave close contact part 18' facing in the width direction of the knob 5. It is designed so that it can be inserted in line with the protrusion 31 of the piece 7.

<Effects of the invention> As explained above, according to the invention, the bearing portion 2 of the main body 3 is provided with opposing elastic pieces 7, and the shaft portion of the knob 5 that passes within the opposing spacing l between the two elastic pieces 7. 16
, there is a close contact part 18 that comes into close contact with the opposing surfaces of both elastic pieces 7, and an expansion part that presses the opposing surfaces of both elastic pieces 7 outward to widen the opposing distance l or l'. Since the portions 19 are provided alternately and continuously, not only does a clicking sensation occur when the knob 5 rotates, but also because the knob 5 does not move up and down at this time, the elastic piece 7 does not move when the knob 5 rotates. To provide a highly durable twist latch 1 on which no axial force acts, less rattling and less chance of the shaft coming off. Further, behind each elastic piece 7, 7, there is a raised protrusion 12, 12.
In order to prevent the elastic piece 7 from being excessively bent outward by receiving the elastic piece 7 from behind when the expanding part 19 presses the elastic piece 7 outward, To prevent a situation where an elastic piece is torn to pieces and becomes unusable.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a plan view of the main body, Fig. 3 is a bottom view of the same, and Fig. 4 is a cross section taken along the - line in Fig. 2. Figure 5 is a sectional view taken along the line V-V in Figure 2, Figure 6 is a perspective view of the main part of the knob, Figure 7 is a plan view of the plate, and Figure 8 is a cross-section taken along the - line in the same figure. Figure 9 is a cross-sectional view taken along the - line of the same as above, Figure 10 is a cross-sectional view of the assembled state, Figure 11 is a cross-sectional view of the knob of the same as above when twisted 90 degrees, and Figures 12 a to b are Explanatory diagrams showing the relationship between the elastic piece and the shaft portion, FIGS. 13 to 1
Fig. 4 is a perspective view of the used state, Fig. 15 is an exploded perspective view showing another embodiment, Fig. 16 is a perspective view of the main part of the above knob, Fig. 17 is a cross-sectional view of the same as the above assembled state, and Fig. 15 is an exploded perspective view showing another embodiment. Figures 18a and 18b are explanatory diagrams showing the relationship between the elastic piece and the shaft portion. In the drawing, 1 is a twist latch, 2 is a bearing part, and 3 is a twist latch.
is the main body, 4 is the shaft, 5 is the knob, 7 is the elastic piece, 16 is the shaft part, 17 is the opposing surface, 18 is the close part, 19 is the expanded part, H is the mating hole, and l is the spacing between the two elastic pieces. Show each.

Claims (1)

[Claims for Utility Model Registration] A twist latch consisting of a main body having a bearing part and a knob having a shaft rotatably supported by the bearing part, wherein the bearing part is provided with opposing elastic pieces, Around the shaft portion of the knob that passes within the spacing between the two elastic pieces facing each other, there is a close contact portion that comes into close contact with the opposing surfaces of the two elastic pieces, and a close portion that presses the opposing surfaces of both the elastic pieces outward. extended portions that widen the facing distance are provided in succession alternately, and the bearing portion includes a protrusion behind each elastic piece to prevent the elastic pieces from being excessively bent outward by the expanded portions. A twist latch characterized by the provision of.