JP3930685B2 - Snap fit hinge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a hinge for connecting the connecting portions of the first member and the second member that can be opened and closed unilaterally or relatively, so that the connecting portions can be opened and closed. The present invention relates to a snap-fit hinge configured as described above.
[0002]
[Prior art]
Conventionally, as this type of snap-fit hinge, those shown in FIGS. 18 to 20 are known.
[0003]
In this conventionally known one, for example, a snap-fit hinge A is provided between the connecting portion 2a of the first member 2 constituting the transmitting portion of the mobile phone and the connecting portion 6a of the second member 6 constituting the receiving portion. It is attached in the state which connects both. This conventionally known snap-fit hinge A has a collar 1a at one end and is housed and fixed in the connecting portion 2a of the first member 2 that is opened and closed, and the shaft 1 is inserted in the central axis direction. The case body 3 is received and fixed in the connecting portion 2a of the first member 2 that is locked and opened / closed by the flange portion 1a, and the key groove 3a provided in the case body 3 is locked and fitted. A projecting portion 4a, which is slidable in the axial direction, and has a rotary sliding cam portion 4b formed of a convex portion or a concave portion on one end surface, and the shaft 1 is inserted through the central portion in the axial direction. The rotary sliding cam 4 and the cam portion 5a, which is configured by sliding the shaft 1 in the axial direction of the central portion thereof and having a concave portion or a convex portion on one end surface thereof facing the rotary sliding cam portion 4b. And the rotating cam 5 comes out of the shaft 1. The shaft 1 is inserted into the tip of the shaft 1 and the end of the shaft 1 is caulked through a washer 9 to be fixed to the shaft 1 and inserted into the connecting portion 6 a provided on the second member 6. A fastener 7 having a claw portion 7a to be locked, and a compression spring 8 that is housed in the case body 3 while being wound around the shaft 1 and presses the rotating sliding cam 4 toward the rotating cam 5 side. Has been.
[0004]
[Problems to be solved by the invention]
The above-described conventionally known hinge is a housing provided in the connecting portion 2a located outside by overlapping the connecting portions 2a, 6a of the first member 2 and the second member 6 in the axial direction when assembled. By inserting the fastener 7 side first from the hole, the claw portion 7a of the fastener 7 is locked to the other connecting portion 6a, and the case body 3 and the rotating cam 5 are engaged with the connecting portions 2a and 6a. Since the assembly is completed while being combined, there is an advantage that the assembly is easy. However, the conventionally known ones have a problem that the number of parts is large and special caulking equipment is required, and there is a problem that the shaft 1 is made of metal and sawing or header processing. It was an obstacle to cost reduction.
[0005]
An object of the present invention is to provide a snap fit hinge that can reduce the cost and weight as much as possible while maintaining the advantages of a conventionally known snap fit hinge.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention is a snap-fit hinge that connects the connecting portions of the first member and the second member so as to be openable and closable, and which is either the first member or the second member. A groove for preventing rotation is provided on the outer periphery inserted into and fixed to the attachment hole provided in one of the connecting portions, and a case body having one end open and a wall portion at the other end, and a flange at the other end. A shaft that has a circumferential groove and is inserted through an insertion hole provided in the wall portion of the case body, passes through the axial direction of the case body, and engages the flange portion with the wall portion, and the case body is opened. A sliding cam portion is provided on one end surface formed by engaging a key portion provided on the outer periphery of the key groove provided on the end portion side and rotatably inserting the shaft through an insertion hole provided in the central portion axial direction. To the mounting hole provided in the rotary sliding cam and the other one of the first member and the second member An insertion that has a rotation-preventing groove on the outer periphery to be inserted and fixed, a rotating cam portion on the side facing the sliding cam portion of the sliding cam, and the other end portion of the shaft provided in the axial direction of the central portion thereof A rotating cam inserted into the hole, a locking ring attached to the other end of the shaft and engaged with a circumferential groove of the shaft to prevent the rotating cam from being detached, and a ring around the shaft A compression spring provided between the wall portion of the case body and the rotary sliding cam while being wound, and a lock provided to prevent the case body from coming out of the connecting portion It consists of a fastener with a nail | claw, and this fastener was integrally provided in the wall part side of the said case body.
[0007]
The present invention is characterized in that a cap mounting portion is provided on the shaft following the circumferential groove.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
A case where the embodiment of the present invention is implemented in a mobile phone will be described below. The snap-fit hinge according to the present invention is also a first member such as a small personal computer such as an electronic notebook or a small word processor. It can also be widely used as a hinge for opening / closing an opening / closing body of a small OA device or the like configured such that a keyboard body side and a display body as a second member can be opened / closed.
[0009]
According to the drawings, in FIG. 1 to FIG. 14, the reference symbol 10 is a shaft, and as shown in FIG. 4, in particular, a flange portion 10a is provided at one end portion thereof, and a circumferential groove 10b is provided at the other end portion side. Is provided. The material of the shaft 10 is a ground metal rod such as SUM24L, but can be made of a synthetic resin such as POM. Further, a cap mounting portion 10c is continuously provided following the circumferential groove 10b.
[0010]
An indication symbol 11 is, for example, a round cylindrical case body made of a synthetic resin such as POM and the outer periphery thereof has grooves 11a and 11a for preventing rotation in the axial direction, particularly as shown in FIGS. Is provided. As shown in FIG. 6, the grooves 11 a and 11 a are engaged with the locking protrusions 12 c provided inside the mounting holes 12 b provided in the connecting portion 12 a of the second member 12, thereby It is comprised so that it may rotate with the member 12 of this. As shown in FIGS. 3 and 4, the case body 11 has shafts 10 in the axial directions of the central portions of the insertion hole 11c formed in the wall portion 11b provided at one end portion and the hollow portion 11d. The shaft 10 is rotatably inserted and is locked to the shaft 10 so as not to come out from the one end side of the shaft 10 by the flange portion 10a. The case body 11 is also provided with key grooves 11e and 11e cut from the open end side, as shown in FIGS. 2, 5, and 7, in particular. And from the edge part of the case body 11, each formed by the division into four has the latching claw 16a, and the four fasteners 16 which consist of the leg part 16b which has elasticity are integrally formed.
[0011]
Reference numeral 13 is a rotating sliding cam made of sintered metal and resin impregnated such as SMF5040, for example, and Ni plating (electroless) is applied to the surface after quenching. As shown in FIG. 10, the rotary sliding cam 13 is provided with an insertion hole 13a through which the shaft 10 is rotatably inserted in the axial direction of the central portion, and key grooves 11e and 11e of the case body 11 on the outer periphery. Key portions 13b and 13b that are fitted and engaged are provided. On one end face of the key portion, there is provided a rotary sliding cam portion 13d comprising convex portions 13c, 13c in the axial direction and concave portions 13e, 13e provided in other portions.
[0012]
Reference numeral 14 is a rotating cam made of sintered metal and resin impregnated such as SMF5040, for example, and Ni plating (electroless) is applied to the surface after quenching. As shown in FIGS. 12 to 14, the rotary cam 14 is formed by inserting the shaft 10 through an insertion hole 14 a provided in the axial direction of the central portion so that the rotary slide cam 13 rotates. On the surface facing the cam portion 13d, rotating cam portions 14d composed of concave portions 14b, 14b and convex portions 14c, 14c are provided at intervals of 180 °. In the direction of the outer peripheral axis of the rotating cam 14, anti-rotation grooves 14e and 14e are provided at intervals of 180 °, and the grooves 14e and 14e are particularly connected to the connecting portion of the second member 15 as shown in FIG. It engages with locking protrusions 15c, 15c provided in the mounting hole 15b of 15a.
[0013]
The rotating cam 14 is locked so as not to come out of the shaft 10 by a locking ring 19 such as an E ring that is locked and fitted in the circumferential groove 10 b of the shaft 10.
[0014]
In the hollow portion 11d of the case body 11, the compression spring 17 is interposed between the case body 11 and the rotary sliding cam 13 while being rewinded around the shaft 10 as shown in FIGS. The rotary sliding cam 13 is pressed against the rotary cam 14 side. In addition, what is shown by the designation | designated symbol 18 is a cap, and is engaged with the cap attaching part 10c which consists of the flange part provided in the edge part of the shaft 10, and a circumferential groove.
[0015]
Therefore, as shown in FIG. 6 in particular, the connecting portions of the first member and the second member are overlapped in the axial direction, and the snap fit hinge B according to the present invention is provided from the mounting hole 15b of the connecting portion located on the outside. When the fastener 16 is inserted with the fastener 16 first, the case body and the rotating cam engage with each connecting portion, and the hook portion of the fastener protrudes from the attaching hole 12d of the connecting portion located inside, and the attaching hole 12d. The snap-fit hinge B can be attached with a single touch.
[0016]
In principle, the snap-fit hinges are attached to both sides of each connecting portion of the first member 12 and the second member 15 as shown in FIG. The method of use is not limited to this, and one piece may be attached. In mounting, as shown in FIG. 6 in particular, the connecting portion 15a of the first member 15 and the connecting portion 12a of the second member 12 are combined in the axial direction, and then the snap-fit hinge B is attached to the fastener. 16 side first, and the groove 11a and the groove 14e are inserted from the mounting hole 15b side of the first connecting portion 15a in accordance with the positions of the locking protrusion 15c and the locking protrusion 12c. As shown in FIGS. 1 to 3, the pawl 16 b is engaged with a locking hole 12 d provided in the mounting hole 12 b of the connecting portion 12 a of the second member 12, so that attachment or assembly is performed with one touch. To complete.
[0017]
Now, in a state where the first member and the second member are overlapped and closed, as shown in FIGS. 2 and 3, the rotary sliding cam 13 is inserted into the concave portion 14 b of the rotary cam portion 14 d of the rotary cam 14. Since the convex portion 13c of the rotational sliding cam portion 13d is fitted and the rotational sliding cam 13 is pressed to the rotational cam 14 side by the compression spring 17 in this state, the first member and the second member The closed state due to the superposition of the plates keeps stability and does not open naturally unless external force is applied. From this state, when the second member is opened relative to the first member or both members are relatively opened, the convex portion 13c of the rotary sliding cam portion 13d initially escapes from the concave portion 14b of the rotary cam portion 14d. However, until the opening angle is about 140 °, the convex portion 13c of the rotary sliding cam portion 13d is in pressure contact with the convex portion 14c of the rotary cam portion 14d. Since the frictional rotation slides in the state, both members can be stably stopped and held at an arbitrary position.
[0018]
When the opening angle of both members exceeds 140 °, both members are automatically opened by the rotational torque generated when the convex portion 13c of the rotary sliding cam portion 13d falls into the other concave portion 14b of the rotary cam portion 14d. After that, it can be opened up to 165 °. When both members are opened to 165 °, both members are not opened further by the stopper means (not shown) provided in the connecting portion.
[0019]
Next, when closing both members, contrary to the previous case, the convex portion 13c of the rotary sliding cam portion 13d encounters resistance when it escapes from the concave portion 14b of the rotary cam portion 14d. If the opening angle is about 20 °, the rotation 13c of the rotating sliding cam portion 13d falls into the recess 14b of the rotating cam portion 14d. It is automatically closed by torque.
[0020]
FIG. 15 shows another embodiment of the snap-fit hinge according to the present invention. According to the drawing, the shaft 20 is made of a synthetic resin such as POM, for example, and the fastener portion 21 composed of four leg portions 21b having locking claws 21a at the end portion on the case body 22 side is integrated. The fastener portion 21 also serves as a retaining member for the case body 22 at the same time. Except for the fact that the case body 22 does not have a fastener, the other structure is the same as that of the previous embodiment shown in FIGS. In the visible portion, the instruction symbol 22a is the same keyway as that of the embodiment shown in FIGS.
[0021]
Even if implemented in this way, the object of the present invention can be achieved. If the shaft is made of synthetic resin, the manufacturing cost can be further reduced. Moreover, since the attachment method with respect to each connection part of a 1st member and a 2nd member is the same as the thing of previous embodiment, and the effect of each other member is also the same, description is abbreviate | omitted.
[0022]
16 to 17 show still another embodiment of the snap-fit hinge according to the present invention, and the point that a fastener 31 composed of a plurality of legs 31b having locking claws 31a is provided on the shaft 30 is as follows. Although it is the same as that of the embodiment shown in FIG. 15, each part attached to this shaft 30 is different from that of the embodiment shown in FIGS. 1 to 14 and FIG. .
[0023]
That is, the rotary cam 32, the rotary sliding cam 33, and the case body 34 are attached to the side of the shaft 30 where the fastener 31 is provided, and the shaft 30 is returned between the case body 34 and the rotary sliding cam 33. A compression spring 35 is elastically wound. A cap 36 is attached to a cap attachment portion 30 a provided at a portion where the shaft 30 protrudes from the case body 34. Further, the member indicated by the reference symbol 37 is a locking ring such as an E ring that engages with the circumferential groove 30b of the shaft 30 to prevent the case body 34 from coming off.
[0024]
In any of the above embodiments, the cap may be attached to the rotating cam or the case body. Further, the number of leg portions with locking claws constituting the fastener is not limited, and there may be two or three legs.
[0025]
Even if it carries out like this, the objective of this invention can be achieved, and if a shaft is comprised with a synthetic resin, manufacturing cost can further be reduced.
[0026]
Moreover, the attachment method with respect to each connection part of a 1st member and a 2nd member is also the same as the thing of previous embodiment, and the assembly | attachment order with respect to the shaft of each other member is the thing of the previous embodiment. Only the opposite is the difference, but the effect is the same, so the explanation is omitted.
[0027]
Although the above explanation has been given mainly for the case where it is used for a cellular phone, the maximum opening angle and the automatic suction angle for automatically opening and closing both members including this cellular phone are described above. It is not limited to the form of.
[0028]
Furthermore, both the rotary sliding cam and the rotary cam, or one of them, can be made of a material other than sintered metal, such as a die-cast casting, a forging press, a synthetic resin, or a ceramic.
[0029]
The shape of the convex part and the concave part of the rotary sliding cam part provided in the rotary sliding cam and the shape and number of the concave part and convex part of the rotary cam part provided in the rotary cam are not limited to those of the embodiment. Moreover, you may make the installation position of the recessed part and convex part which are provided mutually reverse to the thing of embodiment.
[0030]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0031]
According to the first aspect of the present invention, the rotational sliding cam portion and the rotational cam of the rotational sliding cam are associated with the opening / closing operation or the relative opening / closing operation of either the first member or the second member. The first member and the second member are opened and closed freely in a predetermined opening / closing angle range by a one-sided or relative pressure-contact sliding rotation action with respect to the rotary cam portion, and a predetermined It can be automatically opened and closed at the opening angle or more and / or below the predetermined closing angle, and the closed state can be kept stable.
[0032]
And since the fastener was integrally provided with respect to the case body, the effect that the integration with respect to each connection part of a 1st member and a 2nd member can be performed by one touch can be show | played.
[0033]
If comprised like Claim 2, a cap can be directly attached to the edge part of a shaft.
[Brief description of the drawings]
FIG. 1 is a plan view of a mobile phone equipped with a snap-fit hinge according to the present invention when opened.
FIG. 2 is a plan view showing an attached state of the snap-fit hinge according to the present invention.
3 is a plan sectional view of the snap-fit hinge shown in FIG. 2. FIG.
4 is a plan sectional view for explaining the operation of the snap-fit hinge shown in FIG. 2; FIG.
FIG. 5 is an exploded plan view of the snap-fit hinge shown in FIG.
6 is an explanatory view for explaining a method of assembling the snap-fit hinge shown in FIG. 2. FIG.
7 is a right side view of the case body of the snap-fit hinge shown in FIG. 2. FIG.
8 is a left side view of the case body shown in FIG.
9 is a longitudinal sectional view of the case body shown in FIG. 7. FIG.
10 is a right side view of the rotary sliding cam of the snap-fit hinge shown in FIG. 2. FIG.
11 is a development view of the rotary sliding cam shown in FIG. 10 from 0 ° to 180 °. FIG.
12 is a left side view of the rotary cam of the snap-fit hinge shown in FIG. 2. FIG.
13 is a right side view of the rotating cam shown in FIG.
14 is a development view of the rotary cam shown in FIG. 12 from 0 to 180 °. FIG.
FIG. 15 is an exploded plan view showing another embodiment of the snap-fit hinge according to the present invention.
FIG. 16 is an exploded plan view showing still another embodiment of the snap-fit hinge according to the present invention.
FIG. 17 is a cross-sectional view showing an attached state of the snap-fit hinge shown in FIG. 16;
FIG. 18 is a plan view of a conventional snap-fit hinge.
19 is an enlarged cross-sectional view of a fastener portion of the snap-fit hinge shown in FIG.
20 is an exploded plan view of the snap-fit hinge shown in FIG.
[Explanation of symbols]
10 shaft 10a buttocks
10b Circumferential groove 10c Cap mounting portion 11 Case body 11a Non-rotating 11e Key groove 12 First member 12a Connecting portion 12b Mounting hole 12c Locking protrusion 13 Rotating sliding cam 13a Insertion hole 13b Key portion 13c Protruding portion 13d Rotating sliding Cam part 13e Concave part 14 Rotating cam 14b Concave part 14c Convex part 14d Rotating cam part 14e Detent 15 Second member 15a Connecting part 15b Mounting hole 16 Fastener 16a Locking claw 16b Leg part 16c Split groove 17 Compression spring 18 Cap 19 Locking ring 20 shaft 21 fastener 21a locking claw 21b leg 22 case body 22a keyway 30 shaft 30a cap attachment portion 31 fastener 31a locking claw 31b leg 32 rotates the cam 33 rotates the slide cam 34 casing 35 compression split Grayed 37 locking ring

Claims (2)

A snap-fit hinge that connects each connecting portion of the first member and the second member so as to be openable and closable, and is inserted into an attachment hole provided in one of the connecting portions of the first member and the second member. A fixed outer periphery is provided with a rotation-preventing groove, one end of the case body having a wall at the other end, a flange at one end and a circumferential groove at the other end, A shaft formed by passing through the insertion hole provided in the wall portion and passing through the axial direction thereof and engaging the flange portion with the wall portion, and a key groove provided on the open end side of the case body on the outer periphery thereof A rotary sliding cam having a sliding cam portion on one end surface formed by engaging the provided key portion and rotatably inserting the shaft into an insertion hole provided in the axial direction of the central portion; and the first member; An anti-rotation groove is provided on the outer periphery that is inserted into and fixed to the mounting hole provided in the other of the second members. A rotating cam having a rotating cam portion on the side facing the sliding cam portion of the sliding cam, the other end portion of the shaft being inserted into an insertion hole provided in the axial direction of the central portion, and the shaft A locking ring that is attached to the other end side and engages with a circumferential groove of the shaft to prevent the rotation cam from coming off, and the wall portion of the case body and the rotation while being wrapped around the shaft A compression spring provided between the sliding cam and a fastener with a locking claw provided to prevent the case body from slipping out of the connecting portion. A snap-fit hinge characterized by being integrally provided on the side of the body wall. The snap fit hinge according to claim 1, wherein the shaft is provided with a cap attaching portion subsequent to the circumferential groove.

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