JP2015021612A - Hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge which is reducible in size and weight by obtaining desired friction torque by securing a slide area of a spring even if an outside diameter of a shaft part is contracted, and in which a cam structure can be easily formed.SOLUTION: In a hinge 10, when a shaft part 21 is inserted into a spring pin 30, a spring pin 30 becomes relatively non-rotatable with respect to a first member 20. When a second member 50 is inserted into a case part 51 in a state that the spring pin 30 is contracted radially inward, an external peripheral face of the spring pin 30 is pressed against an internal peripheral face of the case part 51 by an elastic force of the spring pin 30, the second member 50 becomes relatively non-rotatable with respect to the spring pin 30 while receiving slide resistance, a cam groove 51a is formed at the internal peripheral face of the case part 51, and a cam part 31 which is engaged with the cam groove 51a is formed on the external peripheral face of the spring pin 30 while outwardly protruding.

Description

  The present invention relates to hinge technology.

  Various techniques relating to a hinge that rotatably connects a second connection object to the first connection object are known. Among them, there is known a hinge that is reduced in size and weight by generating a friction torque between a first member and a second member (see Patent Document 1 and Patent Document 2).

JP 2004-225780 A JP 2005-30463 A

  In the hinges described in the respective patent documents, the shaft portion of the first member is inserted into the cylindrical portion of the second member, and a spring pin is interposed between the shaft portion and the cylindrical portion. A frictional force is generated between the inner peripheral surface of the spring pin and the outer peripheral surface of the shaft portion, and a friction torque is generated between the first member and the second member.

  According to the configuration in which the friction force is generated between the inner peripheral surface of the spring pin and the outer peripheral surface of the shaft portion as in the prior art, in order to generate a predetermined friction torque, the outer diameter size of the shaft portion is set. It was necessary to secure a sliding area between the shaft portion and the spring pin by increasing the size to some extent. In other words, when the outer diameter of the shaft portion is reduced, the sliding area between the shaft portion and the spring is reduced, and a desired friction torque may not be obtained. That is, this has been a hindrance to downsizing and weight reduction of the hinge.

  In addition, in the configuration in which a frictional force is generated between the inner peripheral surface of the spring pin and the outer peripheral surface of the shaft portion, when an attempt is made to click the hinge, a cam structure (cam and cam) is formed between the spring pin and the shaft portion. Cam groove) must be formed. However, when the outer diameter of the shaft portion is reduced, it is difficult to form a cam structure between the spring pin and the shaft portion.

  The present invention has been made in view of the circumstances as described above. Even if the outer diameter of the shaft portion is reduced, a desired friction torque can be obtained by securing the sliding area of the spring. It is an object of the present invention to provide a hinge that can be easily formed and can easily form a cam structure.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to claim 1, a cylindrical member into which the shaft portion is inserted, a first member having a shaft portion, a first support portion continuous with the shaft portion in the axial direction of the shaft portion, and the shaft portion is inserted. A second member having a spring pin, a bottomed cylindrical case portion in which the shaft portion is inserted together with the spring pin, and a second support portion continuous with the case portion in the axial direction of the case portion; When the shaft portion is inserted into the spring pin, the spring pin is not rotatable relative to the first member, and the spring pin is contracted radially inward. By being inserted into the case portion, the outer peripheral surface of the spring pin is pressed against the inner peripheral surface of the case portion by the elastic force of the spring pin, and the second member slides against the spring pin. Dynamic resistance A cam groove is formed on the inner peripheral surface of the case portion, and a cam portion that engages with the cam groove is formed to protrude outward on the outer peripheral surface of the spring pin. is there.

  According to a second aspect of the present invention, the cam portion formed on the spring pin is formed to have a predetermined length out of the axial length of the spring pin.

  According to a third aspect of the present invention, the outer peripheral surface of the spring pin is adjacent to the cam portion in the axial direction of the spring pin at a portion other than the predetermined portion in the axial length of the spring pin. A flat portion is formed, and a fixing member is interposed between the inner peripheral surface of the case portion and the flat portion of the spring pin.

  According to a fourth aspect of the present invention, each of the proximal end portion of the shaft portion of the first member and the distal end portion of the case portion of the second member has an angle restricting portion that restricts the rotation angle of each other. Is formed.

As effects of the present invention, the following effects can be obtained.
That is, according to the hinge according to the present invention, even if the outer diameter of the shaft portion is reduced, the sliding area of the spring can be ensured and a desired friction torque can be obtained, so that the size and weight can be reduced. In addition, the cam structure can be easily formed.

The perspective view which showed the hinge which concerns on 1st embodiment. The exploded perspective view of a hinge similarly. (A) And (b) is the partially notched front view and partially notched top view which respectively showed the hinge. AA line sectional view in Drawing 3 (a). The disassembled perspective view which showed the hinge which concerns on 2nd embodiment. The middle part sectional view of the hinge concerning a second embodiment.

  First, the hinge 10 which concerns on 1st embodiment of this invention is demonstrated using FIGS. 1-4. In this specification, the direction of the arrow shown in FIGS. 1 to 4 will be described as the direction in the hinge 10. That is, the hinge 10 according to the present embodiment is formed as a shaft-like member whose axial direction is directed to the left and right, and a first member 20 and a second member 50, which will be described later, are centered on the axial center directed to the lateral direction. As a relatively rotatable structure. In addition, the dashed-dotted line in FIG. 2 has shown the positional relationship at the time of connecting each member.

  The hinge 10 is used as a connector for rotatably connecting two members such as a main body portion and a display portion of a notebook personal computer, for example. Hereinafter, the two members connected by the hinge 10 will be described as a “first connection object” and a “second connection object”.

  As shown in FIGS. 1 to 4, the hinge 10 includes a first member 20, a spring pin 30, a spacer 40, and a second member 50 as main components.

The first member 20 is a resin member fixed to the first connection object. The first member 20 includes a shaft portion 21 and a first support portion 22 that is continuous with the shaft portion 21 on the left side of the shaft portion 21.
The shaft portion 21 is formed in a shape in which the upper and lower surfaces of a columnar shape whose diameter in the middle in the left-right direction is enlarged are cut out by a pair of planes. Respective planes on the upper and lower sides of the shaft portion 21 are referred to as plane portions 21a and 21a.

  On the left side of the shaft portion 21, a first support portion 22 fixed to the first connection object is formed. The first support portion 22 is formed in a shape in which the upper and lower surfaces of a columnar shape are cut out by a pair of planes. A fixing hole 22a is opened in the first support portion 22 through a pair of planes. The first support portion 22 is fixed to the first connection object by fixing the fixing tool to the first connection object in a state where a fixing tool such as a bolt is inserted into the fixing hole 22a.

  Between the shaft portion 21 and the first support portion 22, an engaged portion 23 whose diameter is increased outward in the radial direction is formed. The first member 20 and the second member 50 are connected by engaging the engaged portion 23 with an engaging portion 51c in the second member 50 described later.

  The shaft portion 21 of the first member 20 is inserted into a spring pin 30 that is a metallic cylindrical member. The lower part of the spring pin 30 is divided in the front and rear direction by forming a cut in the axial direction. The outer diameter of the spring pin 30 is formed to be larger than the inner diameter of the case portion 51 in the second member 50 in a normal state. On the upper part of the spring pin 30, a cam portion 31 protruding upward is formed in the axial direction.

  When the shaft portion 21 is inserted into the spring pin 30, a resin spacer 40 is inserted into the notch of the spring pin 30. A flat portion 40a is formed on the upper portion of the spacer 40, and when the spring pin 30 is inserted into the notch, the flat portion 40a comes into contact with the flat portion 21a formed on the lower side of the shaft portion.

The second member 50 is a resin member fixed to the second connection object. The second member 50 includes a case part 51 and a second support part 52 that is continuous with the case part 51 on the right side of the case part 51.
The case portion 51 is a bottomed cylindrical member whose right side is closed and whose left side is open. As shown in FIG. 4, a cam groove 51 a is formed on the inner peripheral surface of the case portion 51 in the axial direction. Cutouts 51 b are formed in the upper and lower portions of the left end portion of the case portion 51. Further, an engagement portion 51 c that protrudes inward in the radial direction is formed on the inner peripheral surface of the left end portion of the case portion 51. When the shaft portion 21 of the first member 20 is inserted into the case portion 51, the left end portion of the case portion 51 is elastically deformed by the engaged portion 23 so that the diameter thereof is increased. And the engaging part 51c engages with the to-be-engaged part 23, and the 1st member 20 and the 2nd member 50 are connected.

  On the right side of the case part 51, a second support part 52 fixed to the second connection object is formed. The 2nd support part 52 is formed in the shape by which the cylindrical upper and lower surfaces were cut off by a pair of planes. A fixing hole 52a is opened in the second support portion 52 through a pair of planes. The second support portion 52 is fixed to the second connection object by fixing the fixing tool to the second connection object in a state where a fixing tool such as a bolt is inserted into the fixing hole 52a.

  When forming the hinge 10, the shaft portion 21 of the first member 20 is inserted into the spring pin 30. Then, the spacer 40 is inserted into the notch of the spring pin 30. In this state, the spring pin 30 is contracted by applying a force radially inward. In this state, the shaft portion 21, the spring pin 30, and the spacer 40 are inserted into the case portion 51 of the second member 50.

  When the shaft portion 21 is inserted into the spring pin 30 to form the hinge 10 as described above, the flat surface portion 21a on the lower side of the shaft portion 21 abuts against the flat surface portion 40a of the spacer 40 as shown in FIG. Further, the flat surface portion 21 a on the upper side of the shaft portion 21 abuts on a step portion 32 formed on the spring pin 30. For this reason, the spring pin 30 is engaged with the first member 20 and becomes relatively non-rotatable. In other words, when the first member 20 rotates about the axis, the spring pin 30 rotates together with the first member 20.

  Further, as described above, the spring pin 30 is inserted into the case portion 51 in a state of contracting radially inward. As a result, the outer peripheral surface of the spring pin 30 is pressed against the inner peripheral surface of the case portion 51 by the elastic force of the spring pin 30. In this way, the second member 50 is rotatable relative to the spring pin 30 while receiving sliding resistance. That is, the first member 20 and the second member 50 can rotate around the axis while receiving friction torque due to sliding resistance between the spring pin 30 and the inner peripheral surface of the case portion 51.

  As described above, the cam groove 51a is formed on the inner peripheral surface of the case portion 51, and the cam portion 31 that engages with the cam groove 51a is formed on the outer peripheral surface of the spring pin 30 so as to protrude outward. For this reason, when the shaft part 21 and the spring pin 30 are inserted into the case part 51 to form the hinge 10 and the first member 20 and the second member 50 are relatively rotated, the cam part 31 becomes the cam groove. A click feeling can be given to the user when engaged with 51a.

  According to the hinge 10 described in the present embodiment, a frictional force is generated between the outer peripheral surface of the spring pin 30 and the inner peripheral surface of the case portion 51 as described above. For this reason, compared with the structure which produces sliding resistance inside a spring pin, the sliding area of the spring pin 30 and the case part 51 can be enlarged. That is, even when the outer diameter dimension of the hinge 10 is reduced, the sliding area between the spring pin 30 and the case portion 51 can be secured, so that a predetermined friction torque can be generated. That is, according to the hinge 10 according to the present embodiment, it is possible to reduce the size and weight with a simple configuration.

  Further, according to the hinge 10 described in the present embodiment, the cam portion 31 that generates frictional force between the outer peripheral surface of the spring pin 30 and the inner peripheral surface of the case portion 51 is engaged with the cam groove 51a. It is configured to produce a click feeling. That is, compared with the structure which forms a cam structure inside a spring pin, since the sliding area of the spring pin 30 and the case part 51 becomes large, formation of a cam structure becomes easy. That is, even when the outer diameter dimension of the hinge 10 is reduced, the cam structure can be easily formed between the spring pin 30 and the case portion 51.

  As described above, according to the hinge 10 according to the present embodiment, even if the outer diameter of the shaft portion is reduced, the sliding area of the spring pin 30 can be secured and a desired friction torque can be obtained. -The weight can be reduced and the cam structure can be easily formed.

  Next, the hinge 110 which concerns on 2nd embodiment of this invention is demonstrated using FIG.5 and FIG.6. In this specification, the direction of the arrow shown in FIGS. 5 and 6 will be described as the direction in the hinge 110. 5 shows a state in which the shaft portion 21 of the first member 20 is inserted into the spring pin 130, and the alternate long and short dash line in FIG. 5 shows the positional relationship when the members are connected. In the hinge 110 according to the present embodiment, components that are the same as those of the hinge 10 according to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described.

  In the hinge 110 according to the present embodiment, the cam portion 131 formed on the spring pin 130 is formed to have a predetermined length of the length in the left-right direction. Specifically, as shown in FIG. 5, only the portion of the length L at the right end portion of the spring pin 130 protrudes upward and is formed as a cam portion 131.

  In the present embodiment, when the first member 20 and the second member 50 are relatively rotated, the cam portion 131 engages with the cam groove 51a and is given to the user when configured as described above. The intensity of feeling can be adjusted. That is, by making the length L of the cam portion 131 appropriate, an optimal click feeling can be obtained. Thereby, the strength of the friction torque due to the sliding resistance between the cam portion 131 of the spring pin 130 and the inner peripheral surface of the case portion 51 can also be adjusted.

  Further, in the hinge 110 according to the present embodiment, on the outer peripheral surface of the spring pin 130, the axial center of the spring pin 130 is disposed on a portion other than the cam portion 131 in the predetermined portion of the length of the spring pin 130 in the left-right direction. A flat portion 132 adjacent to the cam portion 131 is formed in the direction. A fixing member 60 is inserted between the inner peripheral surface of the case portion 51 and the flat portion 132 of the spring pin 130.

  According to the present embodiment, when the shaft portion 21 is inserted into the spring pin 130 to form the hinge 110, the flat portion 21a on the upper side of the shaft portion 21 is a spring as shown in FIG. It abuts on the lower surface 132a of the flat portion 132 formed on the pin 130. Thus, the area when the spring pin 130 engages with the first member 20 can be increased as compared with the first embodiment. For this reason, the spring pin 130 can be more firmly engaged with the first member 20.

  In the hinge 110 according to the present embodiment, the rotation angle of each of the proximal end portion of the shaft portion 21 in the first member 20 and the distal end portion of the case portion 51 in the second member 50 is restricted. An angle restricting portion is formed. Specifically, an angle restricting protrusion 23 a is formed on the engaged portion 23 of the first member 20. When the first member 20 and the second member 50 are joined, the angle restricting projection 23 a is inserted between the notches 51 b of the second member 50. As a result, the first member 20 can rotate relative to the second member only within a range where the angle restricting projection 23a is between the notches 51b. In other words, in the hinge 110 according to the present embodiment, the first member 20 and the second member 50 can regulate the rotation angle of the first member 20 and the second member 50 by the angle restricting projection 23a and the notch 51b which are angle restricting portions. It is.

DESCRIPTION OF SYMBOLS 10 Hinge 20 1st member 21 Shaft part 30 Spring pin 31 Cam part 50 Second member 51 Case part 51a Cam groove

Claims (4)

A first member having a shaft portion, and a first support portion continuous with the shaft portion in the axial direction of the shaft portion;
A cylindrical spring pin into which the shaft portion is inserted;
A hinge comprising: a second member having a bottomed cylindrical case portion into which the shaft portion is inserted together with the spring pin; and a second support portion that is continuous with the case portion in the axial direction of the case portion. Because
When the shaft portion is inserted into the spring pin, the spring pin is not rotatable relative to the first member;
When the spring pin is inserted into the case portion in a radially contracted state, the outer peripheral surface of the spring pin is pressed against the inner peripheral surface of the case portion by the elastic force of the spring pin. The second member is rotatable relative to the spring pin while receiving sliding resistance.
A cam groove is formed on the inner peripheral surface of the case portion, and a cam portion engaging with the cam groove is formed on the outer peripheral surface of the spring pin so as to protrude outward.   The hinge according to claim 1, wherein the cam portion formed on the spring pin is formed to a length of a predetermined portion of a length of the spring pin in an axial direction. On the outer peripheral surface of the spring pin, a flat portion adjacent to the cam portion in the axial direction of the spring pin is formed in a portion other than the predetermined portion of the length in the axial direction of the spring pin,
The hinge according to claim 2, wherein a fixing member is interposed between the inner peripheral surface of the case portion and the flat portion of the spring pin.   An angle restricting portion that restricts a rotation angle of each other is formed on each of a proximal end portion of the shaft portion in the first member and a distal end portion of the case portion in the second member. The hinge according to any one of claims 1 to 3.

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