JPH0583821U - Tilt mechanism for small electronic devices - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the weight of the tilt mechanism of small electronic devices and reduce the number of parts and costs. [Structure] In the central portion of the opening / closing body 12, a protrusion portion 14 whose both side surfaces are vertical surfaces 14a is provided toward the main body 13.
3 is formed with a recessed portion 18 in which both side surfaces into which the protruding portion 14 is fitted are vertical surfaces 18a, and the vertical surface 14a is biased by a coil spring 16 in the protruding direction. The conical protruding piece 17 that rotates by rotating the conical protruding piece 17 is provided.
Inserted in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention makes an opening / closing body (lid) such as a relatively thin display such as a liquid crystal suitable for carrying around on a main body of a word processor, a personal computer or the like provided with a keyboard, etc. so that it can be opened and closed. The tilt mechanism for small electronic devices that can be stopped in a tilted state so that the display is easy to see when you open the.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, as shown in FIG. 12, for example, a tilt mechanism in a small electronic device of this type is provided with a keyboard of a personal computer or the like on an opening / closing body (lid) 1 on which a thin display surface such as a liquid crystal is provided. The protrusions 1a are formed on both the left and right sides of the position close to both ends on the main body 2 side.

A recess 2a is formed in the main body 2 so as to face the protruding portion 1a, and the protruding portion 1a is fitted therein. The recess 2a faces the outer surface of the protruding portion 1a and the outer surface of the protruding portion 1a. Insertion holes 1b, 2b are bored in the inner surface of 2a, and the shaft 3 is rotatably inserted therein, and at the same time, the protruding portion 1b side of the shaft 3 is fixed to the opening / closing body 1 inside the protruding portion 1b. It is non-rotatably fixed to the attachment 4.

A coil spring 5 is wound around the shaft 3 on the main body 2 side so as to have a diameter smaller than the outer diameter of the shaft 3, and the left and right coil springs 5 have opposite winding directions. The both-end hooks are attached to a support tool 6 fixed in the main body 2 bearing the shaft 3 so as not to rotate even when the shaft 3 is rotated, and the main body 2 and the opening / closing body 1 are attached. Are electrically connected by a cable 7.

Therefore, when the opening / closing body 1 is opened / closed with respect to the main body 2, the shaft 3 also rotates as the opening / closing body 1 opens / closes. At this time, the tightening force of the coil spring 5 against the shaft 3 acts as a brake. And acts as a load on the opening and closing. Therefore, when the external force for opening / closing is released, the opening / closing body 1 is prevented from falling down by the brake, and the tilted state is maintained.

[0006]

[Problems to be solved by the device]

 In the tilt mechanism of such a small electronic device, the tilt angle of the opening / closing body 1 is obtained only by the frictional force between the coil spring 5 and the shaft 3, and the inner diameter of the coil spring 5 is larger than the diameter of the shaft 3. If it is too much, the frictional force during that time will be weakened, and it will be difficult to maintain the tilt angle of the opening / closing body 1 due to a slight vibration or the like.

On the contrary, if the inner diameter of the coil spring 5 is too small as compared with the diameter of the shaft 3, the frictional resistance between the two becomes large and the opening / closing operation of the opening / closing body 1 becomes difficult to perform. The strength may cause the opening / closing body 1 to be distorted and damage the liquid crystal display.

Therefore, since the inner diameter accuracy of the coil spring 5 is required to be high, the production cost of the coil spring 5 is increased and the cost of parts is increased, and the left and right fixtures 4 and the support fixtures are used. Since there were a total of four mounting parts, six mounting parts, two shafts 3, and a large number of parts, the cost of these parts in the total cost was high, which was an obstacle to cost reduction.

The present invention solves the above-mentioned problems of the tilt mechanism in the conventional small-sized electronic device, and configures the tilt device with inexpensive parts to enable reduction of product cost and weight reduction. The purpose is to reduce the weight of small electronic devices without using a large shaft.

[0010]

[Means for Solving the Problems]

 The present invention provides a conical projecting piece that is provided at a pivotal support portion between the main body of the device and the opening / closing body and engages across the main body and the opening / closing body, and biases the conical projecting piece toward the mating member side. And a biasing means.

[0011]

[Action]

 In the tilt mechanism of the small electronic device of the present invention, by biasing the conical projecting piece, the friction between the conical projecting piece and the main body and the opening / closing body is increased, and the brake caused by this friction prevents the open / closed body from falling down. The tilt angle of the opening / closing body can be maintained.

[0012]

【Example】

 Next, an example of implementation of the present invention will be described below with reference to FIGS. The opening / closing body (lid) 12 to which the liquid crystal display 11 is attached is provided with a protrusion 14 at the center thereof toward the main body 13 side of the personal computer provided with the keyboard. The left and right side surfaces of the portion 14 are vertical surfaces 14a.

The protrusion 14 has a through hole 15 formed in the protrusion 14 from one vertical surface 14 a to the other vertical surface 14 a. In the through hole 15, a coil spring 16 is provided. A conical projecting piece 17 is housed on the left and right outer sides of the coil spring 16 with the conical side facing outward.

The conical projecting piece 17 is movable in the axial direction with respect to the through hole 15, but is not slidable in the rotating direction, and its conical surface has a conical surface as shown in FIG. The knurled irregularities 17a are formed.

On the other hand, by forming protrusions on both the left and right sides of the main body 13, the protrusions 14 of the opening / closing body 12 are fitted, and the left and right opposing surfaces facing the vertical surface 14a of the protrusions 14 are vertical. A concave portion 18 which is a surface 18a is formed, and each vertical surface 18a is formed with a conical concave portion 19 in which concave and convex portions 19a that mesh with the concave convex portion 17a are formed with the same pitch and the same taper. There is.

The conical projecting piece 17 of the opening / closing body 12 configured as described above resists the bias of the coil spring 16 that biases the conical projecting piece 17, and as shown by the arrow in FIG. After being pushed in, the protrusion 14 is moved in the direction of the arrow in FIG. 4, the protrusion 14 is inserted into the recess 18 of the main body 13, and the conical protrusion 17 is released. It is pushed into the conical recess 19 by the biasing force of the coil spring 16.

Then, the opening / closing body 12 is in a state of being axially supported by the conical protruding piece 17 and the conical recessed portion 19 with respect to the main body 13, and the concavo-convex portion 17a of the conical protruding piece 17 and the concavo-convex portion 19a of the conical recessed portion 19 are Since they have the same pitch and the same taper, they are in a meshed state.

Therefore, when the opening / closing body 12 is opened and closed and tilted with respect to the main body 13, the tilt angle is maintained by the above meshing, and the biasing force of the coil spring 16 is not so strong. When an attempt is made to change the tilt angle of 12, the meshing between the unevenness 17a and the unevenness 19a slips, and the angle can be changed.

Next, another embodiment of the present invention will be described with reference to FIGS. 8 to 11. This embodiment is different only in the method of forming the recessed portion 18 in the above-described embodiment, so that the recessed portion 18 The forming method will be described.

One of the protrusions for forming the recess 18 is detachable, and one side of the recess 18 of the main body 13 is formed with guide grooves 20 on both front and rear sides, which are the same as those of the protrusion. A protrusion 21a to be inserted into the guide groove 20 is formed on the lower side of the shaped block 21, and a locking claw 20a is provided on the insertion side of the protrusion 21a of the guide groove 20.

Then, a conical recess 19 having the same unevenness 19 a as in the previous embodiment is formed on the end surface of the block 21 on the side of the recess 18, and therefore, the conical protruding piece 17 on one side of the opening / closing body 12 is formed. 8 is inserted into the conical recess 19 on one side of the recess 18 as shown in FIG. 8, and then the protrusion 21a of the block 21 is inserted into the guide groove 20 as shown in FIG. 9 and locked by the locking claw 20a. By doing so, the opening / closing body 12 can be pivotally supported on the main body 13 as in the previous embodiment.

In the above-described embodiment, the projecting portion 14 having the conical projecting piece 17 is provided on the opening / closing body 12 side, and the recessed portion 18 having the conical recessed portion 19 is provided on the main body 13 side. 18 may be provided on either side of the main body 13 or the recessed portion 18, and the conical projecting piece 17 and the conical recessed portion 19 may be provided on either the projecting portion 14 or the recessed portion 18, and the conical projecting piece 17 and The concavities and convexities 17a and 19a may be omitted if the conical recess 19 is flat and an appropriate frictional force is obtained.

[0023]

[Effect of the device]

 As described above, the present invention does not require the inner diameter accuracy of the coil spring as compared with the conventional tilt mechanism that maintains the tilt angle of the opening / closing body by the frictional resistance between the coil spring and the shaft. Since it only pushes the protruding piece, accuracy is not required and the cost of the coil spring is reduced.

Further, since the conical projecting piece and the conical recessed portion can be formed by injection molding of synthetic resin, the cost thereof can be manufactured at a low cost, and further, the assembly is easy, so that the product can be provided at a low price, and the conventional tilt Since the shaft, which has the largest weight in the mechanism, is not used, the weight of small electronic devices can be reduced.

Further, the undulation resistance of the opening / closing body and the torque required to maintain the tilt angle can be arbitrarily set by making the conical protruding piece and the conical recessed portion into surface contact with each other, or by forming knurled irregularities, and thus smooth. The opening / closing operation and the tilt angle are maintained.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of an embodiment of the present invention in section.

FIG. 2 is a plan view showing a state in which the opening / closing body and the main body are separated from each other.

FIG. 3 is a plan view showing a mounting process of the above.

FIG. 4 is a plan view of the same attachment state as above.

FIG. 5 is a perspective view showing a relationship between a conical protruding piece and a conical recess.

FIG. 6 is a cross-sectional view showing the relationship of the above unevenness.

FIG. 7 is a perspective view showing a tilted state of an opening / closing body.

FIG. 8 is a perspective view of an opening / closing body of another embodiment before being attached.

FIG. 9 is a perspective view of the attachment process of the above.

FIG. 10 is a perspective view of the attachment state of the above.

FIG. 11 is a partial cross-sectional view showing the relationship between the conical protruding piece and the concavity and convexity of the conical recessed portion of the same.

FIG. 12 is a cross-sectional view of a tilt mechanism in a conventional small electronic device.

[Explanation of symbols]

 12 Opening / Closing Body (Lid) 13 Main Body 14 Projection 14a Vertical Surface 16 Coil Spring 17 Cone Projection 18 Dimple 18a Vertical Surface 19 Cone Dimple

Claims (1)

[Scope of utility model registration request] 1. A conical projecting piece that is provided at a pivotal support portion between a main body of an apparatus and an opening / closing body and engages across the main body and the opening / closing body, and biases the conical projecting piece toward a mating member side. A tilt mechanism in a small electronic device, comprising: