KR20100013239A - Springs for slide hinge - Google Patents

Abstract

PURPOSE: An elastic spring for a slide hinge is provided to improve durability by having the same effect as two spring divides load despite one product. CONSTITUTION: An elastic spring for a slide hinge comprises a first spring(10) and a second spring(20). The first spring is composed of a spring of rectangular cross sections which has a parallel side to the driving side. The second spring is composed of a spring of a rectangular cross-section which has a parallel side to the driving surface. The outer diameter of the spring and the outer diameter of the second spring are differently formed to prevent a turn part from being spread in the compression of the spring.

Description

Spring for Slide Hinge {Springs for Slide Hinge}

The present invention relates to a spring for a slide hinge, and relates to a spring for a slide hinge interposed between the front portion and the body portion of the mobile phone that is opened and closed in a slide manner to provide an elastic force when opening and closing the slide.

Portable devices such as mobile communication terminals or cameras have introduced various types of opening and closing methods in consideration of functionality and design. Among them, the slide opening / closing method is generally composed of an arrangement of coil springs (2) for generating a tensile compressive force in a linear direction or a curved direction, and rod structures (1, 4) for supporting this force and transmitting an actuation force to other equipment. (See Figure 1)

In fact, even if four coil springs 2 used to generate a driving force for sliding are taken as shown in Fig. 1, the outer diameter is 1.2 mm or more, and includes the accompanying mechanisms 3 and 3a. Since the thickness occupies more than 1.5mm, it is impossible to configure the module within 1.2mm, the minimum mounting space for the slim sliding terminal. In addition, at least 2 to 4 springs, at least 2 to 4 rods, and welding or assembly points for at least 4 to 6 parts are required, so there are limitations in product price reduction and thickness reduction. Since the same foreign matter is difficult to discharge after penetrating the coil spring, there is a concern that the damage caused by the friction with the mechanism portion, and due to the complex spring structure there is a problem that the opening and closing feeling decreases and the driving force decrease due to the increased number of opening and closing is relatively large.

An object of the present invention is to improve the performance and space-constrained problems and limitations of conventional slide hinges by improving the structure of the spring.

The present invention, in order to solve the above problems,

Winding in the direction of decreasing diameter in the inner plane on the same plane about one end, and changing the layers to reach the center, and winding in the direction of increasing diameter in the outer direction in the state where the layers are different, By providing a spring for the sliding hinge provided that the two torsion springs are combined into one under a limited spring design condition and have a double elastic motion.

Since two springs consist of a single spring in parallel in a confined space, the spring load is doubled and the load can be distributed throughout the spring, which is the same effect as the two springs sharing the load. It can have a durability can be improved, it can make a significant contribution to reducing the mounting space according to the number of springs. In addition, a reduction in the number of springs can result in a cost reduction of at least 10%, such as a reduction in spring price (<2 times), fewer man-hours due to insert injection, and lower assembly costs.

Due to the torsion spring operation characteristic, it is more advantageous to improve the assemblability and mounting ability by securing the flatness and preventing the deviation of the track of the spring, so that sufficient driving force can be exhibited even when mounted in a limited space. That is, it is easy to secure a mounting space for avoiding interference with the FPCB moving in the same space and can contribute greatly to the slimming of the device. In addition, the ability to give more operating force is very effective for applications requiring long strokes of 60 mm or more for functional integration and performance for dead point changes.

2 is a spring for a slide hinge according to the present invention, the inner diameter end of the first spring and the layer is different from each other while the layer is wound in the direction of decreasing the diameter in the inner direction on the same plane with respect to one end The product is formed by continuously forming the inner diameter ends of the second springs which are formed so that both ends are opened in different directions while facing each other while being wound in the direction of increasing the diameter in the outer direction so that the directions of the blowing portions are different from each other. It shows what happens.

The spring produced in the above manner has the effect of combining two torsion springs into one, and the space occupied by half is reduced, the load is overlapped, and the durability is improved while the elastic movement is made.

Since the present invention overlaps the spring in a limited space, the pitch, which is the space between the spring wires, is reduced, and the possibility of interference caused by elastic motion is increased. When such interference occurs during compression of the spring, the openings at both ends of the spring are increased. The phenomenon that the ride on the outer diameter portion to act as a factor to increase the thickness of the product during operation, or the spring phenomena due to the interference phenomenon between the spring turn may occur the product can not function as a product.

The above problem is to have a structure that differs the outer diameter of the first spring and the outer diameter of the second spring in order to prevent the turn portion from opening during compression of the spring, or to prevent interference and maintain the flatness of the first spring and the second The solution can be solved by having a structure that changes the pitch between the springs.

However, as the size of the spring is mounted on a mobile device such as an IT component, the size of the spring can be greatly influenced by the increase of 0.1mm, so that the size of the spring cannot be taken unconditionally. Accordingly, in order to reduce the spring size, the positions of the inner diameter center of the first spring and the inner diameter center of the second spring are different from each other (FIG. 7). It is possible to reduce the overall size of the spring at the same time to ensure durability by maximizing the load distribution effect by adjusting the pitch for (Fig. 8).

On the other hand, according to the application conditions such as thickness, driving force, use environment, unit price, etc., the cross-sectional type of the spring wire rod can be freely selected as circular, square, rhombus, trapezoidal or polygonal cross-sectional shape. Should be used.

Like the spring, the 'Deflection of Curved members' follows the equation (Fig. 9):

(식1)

(Eq. 1)

F: applied force,

R: radius of centroidal axis,

E: Young's modulus,

I: second moment of area

I is determined by the shape of the spring cross section, so

(식2),

(식3)Rectangular cross section:

(Eq. 2),

(Eq. 3)

b = width (x-dimension),

h = height (y-dimension)

(식4)Circular cross section:

(Eq. 4)

r = radius of wire

At this time, if one side of the rectangular cross-section is equal to the diameter (2r) of the circular cross-section b = h = 2r, (Equation 2) and (Equation 3) is the same as follows.

(식5)

(Eq. 5)

(1) is represented by (5) and (4),

(식6)

(Eq. 6)

(식7)

(Eq. 7)

It can be seen that the spring of the rectangular cross section is smaller than the spring of the circular cross section (deflection). In addition, the smaller bending caused by the same amount of force means that more force is needed to bend the same amount. In the case of the spring used for the slide hinge, the spring of the rectangular cross section occupies the same space because it is bent at an angle. It can be seen that the greater the elastic force, and when the elastic force such as a circular cross section is more spatially efficient.

The spring for the slide hinge requires a rotational restraining portion at both ends of the spring holder for coupling with the driving product. The reason is that in the past, both ends of the spring are inserted into a ball formed in the counterpart, and the bending process is applied to facilitate rotation, but due to the springback phenomenon of the bent portion generated by repeated operation, the flow in the vertical direction is generated. This results in a flatness, resulting in scratching of counterparts, joint problems caused by intermetallic friction, and wear problems due to hardness differences, resulting in insert injection, thermal fusion, and snap-fit. Rotating restraint coupling, which can be provided in a fit) manner, is necessary.

On the other hand, when compressing the slide hinge spring, since the load is concentrated on both ends of the spring is required a structure for reinforcing the bonding force with the rivet coupling portion. For this purpose, the six-axis (x, y, z, Mx, My, Mz) load can be applied due to the nature of the spring drive, so it is necessary to support the load in virtually all directions. Ideal. To this end, it is possible to maximize the contact area with the injection-molded by accommodating the rotating end coupling portion in a bent form of the spring end of various forms as shown in FIG. In addition, there is a method of roughening the spring product surface as a method of increasing the contact area. By generating etching surfaces and sharp edges, it is possible to generate a resistive load against rotational loads even when springs of the "-" shape are formed, but the effect is insufficient to be applied to actual products. When applied in parallel with the structure, the friction effect is added to enable greater load support.

In the case of the present invention, due to the unique manufacturing method and cross-sectional shape of the spring forming machine, the spring may be provided with directionality, but it is very difficult for the operator to distinguish it at once with the naked eye. The bending direction structure of the spring for imparting directionality in order to improve workability is necessary in the molding process of the rotational restricting coupling part which can be provided in the insert method at both ends of the spring. The actual example is as shown in Figure 4, even if molded in the opposite direction is no problem.

In addition, the range of the inner angle formed by the two spring linear parts is 100 degrees or more, 170 so that compression can be naturally induced in the shape of the first and second springs in the inner angle formed by the two spring straight parts when the slide hinge is driven. When the configuration is below, the direction is given in advance when the spring is compressed to prevent a malfunction during repeated driving of the slide hinge.

As mentioned above, both ends of the spring can be implemented in various ways, and both ends of the spring are formed by forging to form ends where the thickness of the spring section becomes thinner than the original section thickness, and then create a coupling hole. It is possible to form various types of couplings according to the coupling conditions of the coupling hole with the counterpart of the counterpart. When insert injection molding is performed at the end, the injection portion flows into the coupling hole to maintain a more tight coupling. In addition, even if a proper amount of the protruding portion than the existing width is secured by forging of the spring end, it may help to maintain the bonding force when insert injection molding.

Insert injection molding may be used when a separate body is formed in the spring, and it is important to maintain the flatness of the entire drive according to the compression of the spring. In the case of insert injection molding, it is advantageous that there is no separate assembly of the spring and the body, but when the injection is performed without maintaining the horizontal level in the mold, the overall flatness is not affected, and thus it cannot play the role of the slide hinge product. In order to prevent this, one or more separate mold structures are applied to fit the mold in the injection space or in the contact space, so that the flatness of the product after injection may be maintained by allowing the spring to be seated in the mold without distortion. To help.

In addition, the present invention is characterized in that the center of the inner diameter of the spring is eccentrically positioned in the opposite direction to the blowing position with respect to the center of the entire arc in order to avoid interference between the spiral portion when the spring is compressed.

By increasing the pitch interval of the inner circle toward the outside, the risk of interference during spring compression can be reduced.

1 is an exemplary view of a conventional push rod slide hinge.

Figure 2 is an exemplary view of a spring for a slide hinge, in accordance with the present invention.

3 is a spring bending structure for reinforcing the strength of the slide hinge, according to the present invention.

4 is a spring bending structure for improving the workability of the slide hinge, according to the present invention.

5 is an exemplary view of a slide hinge using a spring and a forged spring shape to reduce the thickness of the end by forging both ends of the spring according to the present invention.

Figure 6 is an exemplary view of the device coupling portion of the slide hinge, according to the present invention.

7 is a structure in which the centers of the first and second springs are eccentric in accordance with the present invention.

8 is a structure having a pitch that increases from inside to outside in accordance with the present invention.

9 is a mathematical reference for the bending of the bent object.

10 is a reference diagram of the spring and the cabinet display of the product.

11 is an example of fixing the spring in the mold at the time of insert injection.

12 is an example of fixing the spring in the mold at the time of insert injection.

        *** Explanation of symbols for main parts of drawing ***

10: first spring 20: second spring

Claims (13)

A first spring composed of a spring having a quadrangular cross section having a side parallel to the driving surface, the first spring being wound in a direction of decreasing diameter in the same plane on one end about the one end, and having different layers while reaching the center; A second spring composed of a spring having a square cross section having a side parallel to the driving surface, the second spring being formed so as to be opened by different directions of both ends by winding in a direction in which the diameter increases in an outward direction in a different state of the layer; The inner diameter end of the first spring and the inner diameter end of the second spring face each other, and are continuously formed to open in different directions. Spring for the hinge hinge, characterized in that the elastic movement while having. The method of claim 1, A slide hinge spring having a structure in which the outer diameter of the first spring and the outer diameter of the second spring are different from each other in order to prevent the turn part from opening when the spring is compressed. The method of claim 1, Spring for sliding hinge having a structure that differs the pitch between the first spring and the second spring to prevent interference and maintain flatness when the spring is compressed. The method of claim 1, A spring for a slide hinge, characterized in that the position of the inner diameter center of the first spring and the inner diameter center of the second spring are different from each other to reduce the size of the spring. The method of claim 1, A spring for a slide hinge, characterized by a bending structure in the horizontal or vertical direction of a spring for reinforcing the engagement force with a rotational engagement coupling portion, which can be provided in an insert injection method at both ends of the spring for engagement with a drive product. The method of claim 1 A spring for a slide hinge, characterized by a bending structure of a spring for imparting directionality to improve workability in a molding process of a rotational engagement portion that can be provided in an insert manner at both ends of the spring for engagement with a drive product. The method of claim 1, A spring for a slide hinge, characterized in that the center of the inner diameter of the spring is eccentrically positioned in the opposite direction of the blowing position with respect to the center of the entire arc. The method of claim 1, The spring for the slide hinge, characterized in that the pitch interval of the inner circle is gradually increased toward the outside. The method of claim 1, When the slide hinge is driven, the compression is induced to a shape in which the first and second springs are included in the cabinet formed by the two spring straight portions, but the range of the cabinet formed by the two spring straight portions is 100 degrees or more and 170 degrees or less. Spring for the slide hinge, characterized in that (Fig. 10). The method of claim 9, Insert injection molding is formed at both ends of the spring so that a specific shape is formed, and one end of the injection part can be rotated with one end of the slide part, and the other end of the injection part is rotated with one end of the main body which linearly moves with the slide part. An elastic actuator for a slide hinge, characterized in that it can be restrained. The method of claim 10, An elastic actuator for a slide hinge, characterized in that one or more separate mold structures are applied to fit the mold in the injection space or in the contact space to fix the flatness when inserting the spring. (Fig. 12) The method of claim 9, Forging one or more of the two ends of the spring to reduce the thickness in the direction parallel to the spring driving surface, insert injection molding on both ends to form a specific shape, one end of the injection end and the rotational restraint It can be, the other injection end of the slide hinge elastic drive body, characterized in that the rotational restraint with the end of the body portion linear movement. The method of claim 12, An elastic actuator for a slide hinge, characterized in that one or more separate mold structures are applied to fit the mold in the injection space or in the contact space to fix the flatness when inserting the spring. (Fig. 12)

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