CN220115195U - Structure of opening/closing cover - Google Patents

Abstract

Provided is an opening/closing cover structure provided with: a torsion coil spring (5); a shaft (4) passing through a spiral part (5 b) of the torsion coil spring (5); a first shaft groove (12) and a second shaft groove (13), supporting the shaft (4); a first housing part (14) for housing a first end part (5 a) of the torsion coil spring (5) outside the first shaft groove (12); a second housing section (15) for housing a second end section (5 c) of the torsion coil spring (5) located on the opposite side of the first end section (5 a) between the first shaft groove (12) and the second shaft groove (13); a cover (1) having two arms (20) protruding from each other, wherein the two arms (20) are each provided with a shaft hole (24) for holding both ends of the shaft (4) and a cutout (23) connected to the shaft hole (24); and a holder (2) which fixes the shaft (4) to the second housing (15) by snap-fit engagement and which biases the torsion coil spring (5) in the direction in which the cover (1) is closed.

Description

Structure of opening/closing cover

Technical Field

The present utility model relates to an opening/closing cover structure.

Background

Conventionally, in order to protect a button used in an emergency, or to avoid an inadvertent operation of the button, an opening/closing cover structure has been designed as a button cover having an automatic closing function.

For example, patent document 1 discloses an opening/closing cover structure in which a cover body that is pivotally supported by a pin so as to be openable and closable and is biased in a closing direction by a spring around the pin is attached to a main body, wherein two arms that support both ends of the pin are provided to protrude from the cover body, a holder that has a receiving portion that receives the spring that is held between the two arms and is held around the pin is provided between the two arms, and a flexible locking piece that is engaged with an engagement portion of the main body is provided at a tip end of the holder, and when the holder is inserted into the main body, the other end side of the spring, one end side of which is held on the cover body side, is twisted so as to be biased in a direction to close the cover body, and is held in the receiving portion.

However, in assembling the opening and closing cover structure having the automatic closing function in the related art, it is necessary to pass a shaft through the spring and the button cover in a state where the holes of the spring and the button cover are aligned to form an assembly, and in this process, in order to avoid the falling off, it is necessary to hold the spring and the button cover by hand at the same time. Further, when the holder is assembled to the above-described module, it is also necessary to hold the holder by hand in order to avoid disassembly.

Technical literature of the prior art

Patent document 1: JP4393675B2

Disclosure of Invention

In view of the problem of lack of assembly convenience in the prior art of the opening and closing cover structure, the utility model provides an opening and closing cover structure with improved assembly convenience.

An opening/closing cover structure according to an embodiment of the present utility model includes: a torsion coil spring; a shaft passing through a spiral portion of the torsion coil spring; a first shaft groove and a second shaft groove for supporting the shaft; a first housing portion that houses a first end portion of the torsion coil spring outside the first shaft groove; a second receiving portion for receiving a second end portion of the torsion coil spring located on an opposite side of the first end portion between the first shaft groove and the second shaft groove; a cover body having two arms protruding from each other, each of the two arms having a shaft hole for holding both ends of the shaft and a cutout portion connected to the shaft hole; and a holder for fixing the shaft to the second housing portion by snap-fitting, and biasing the torsion coil spring in a closing direction of the cover.

Preferably, the first storage portion and the second storage portion are provided on a front panel.

Further, it is preferable that the torsion coil spring has an axial dimension such that the first end portion is in contact with a first arm portion of the double arms in the first housing portion, and the second end portion is in contact with the holder in the second housing portion.

Further, it is preferable that the first end portion is in a straight shape and the second end portion is in a U shape.

Further, it is preferable that an angle between the first end portion of the torsion coil spring and the second end portion of the torsion coil spring is smaller than 180 degrees as viewed in an axial direction of the torsion coil spring.

Further, it is preferable that an angle between the first end portion of the torsion coil spring and the second end portion of the torsion coil spring is greater than 140 degrees and less than 150 degrees as viewed in an axial direction of the torsion coil spring.

By the opening and closing cover structure, a plurality of parts are not required to be simultaneously maintained during assembly, and the convenience of assembly is improved.

Drawings

Fig. 1 is a schematic exploded view of an opening/closing cover structure according to an embodiment.

Fig. 2 is a perspective view showing the torsion coil spring 5 assembled with the shaft 4.

Fig. 3 is a partial perspective view of the shaft 4 and the torsion coil spring 5 assembled to the front panel 3.

Fig. 4A is a partial perspective view of the cap 1 after assembly.

Fig. 4B is a cross-sectional view taken along line I-I of fig. 4A.

Fig. 5A is a partial perspective view of the holder 2 after assembly.

Fig. 5B is a sectional view taken along line II-II of fig. 5A.

Symbol description

1 cover body

2 retainer

3 front panel

4-axis

5 torsion coil spring

5a first end

5b spiral part

5c second end

7 Flexible locking piece

8 accommodating part

9 locking part

10 concave part

11 first shell

12 first shaft groove

13 second shaft groove

14 first receiving portion

15 second receiving portion

16 second shell

17 opening portion

20 double arm

20a first arm

20b second arm

22 handles

23. Cut-out part

24. And the shaft hole.

Detailed Description

The structure of the opening/closing cover according to an embodiment of the present utility model will be specifically described below with reference to the drawings. However, the embodiments described below may include various descriptions for limiting the present utility model. Therefore, the technical scope of the present utility model is not limited to the following embodiments and examples. The size, shape, positional relationship, and the like of the structures shown in the drawings are merely examples, and are not intended to limit the present utility model, and those skilled in the art can appropriately adjust, change, and combine the structures as necessary.

Fig. 1 is a schematic exploded view of an opening/closing cover structure according to an embodiment. Fig. 2 is a perspective view showing the torsion coil spring 5 assembled with the shaft 4. Fig. 3 is a partial perspective view of the shaft 4 and the torsion coil spring 5 assembled to the front panel 3. Fig. 4A is a partial perspective view of the cap 1 after assembly. Fig. 4B is a cross-sectional view taken along line I-I of fig. 4A. Fig. 5A is a partial perspective view of the holder 2 after assembly. Fig. 5B is a sectional view taken along line II-II of fig. 5A.

In the following description, the horizontal direction in the plane of the front panel 3 is the X direction, the vertical direction is the Y direction, and the direction perpendicular to the plane (XY plane) of the front panel 3 is the Z direction (depth direction).

As shown in fig. 1, the opening/closing cover structure of one embodiment includes a cover body 1, a holder 2, a front panel 3, a shaft 4, and a torsion coil spring 5.

Wherein the front panel 3 is a base of the opening and closing cover structure; the cover 1 is attached to the front panel 3, and protects devices (not shown) such as buttons and switches inside the front panel 3; the shaft 4 is a shaft for opening and closing the lid 1, and is a cylindrical pin, for example; a torsion coil spring 5 is inserted in the shaft 4 in the direction indicated by the arrow (X direction) in fig. 1; the holder 2 houses the torsion coil spring 5, and the torsion coil spring 5 is biased in the closing direction of the lid body 1, thereby fixing the lid body 1 and the like to the front panel 3.

The torsion coil spring 5 is a coil-shaped spring, and has a coil portion 5b as a main body portion, a first end portion 5a having a straight shape protruding outward in the winding direction at one end thereof, and a second end portion 5c having a U shape protruding outward in the winding direction and extending outward in the axial direction at the other end thereof. The shape of the first end portion 5a and the second end portion 5c is not limited to this, and may be, for example, a shape other than that shown in the figure, or may be a straight structure. By the torsion coil spring 5 being inserted into the shaft 4 in the X direction, an assembly is formed in which the torsion coil spring 5 and the shaft 4 are assembled as shown in fig. 2.

As shown in fig. 1, a recess 10 for accommodating the lid body 1 is integrally formed in the front panel 3, and the recess 10 is recessed forward in the Z direction from the plane of the front panel 3.

On the positive Y-direction side of the recess 10, a first housing 11 is formed, the first housing 11 protruding in the negative Z-direction from the plane of the recess 10, and the front surface thereof being parallel to the XY plane and on the positive Z-direction side of the front panel 3, the assembled holder 2 being brought into contact with the front surface of the first housing 11.

The first housing 11 is located substantially in the center portion of the recess 10 in the X direction, and has a width smaller than the width of the recess 10 in the X direction, so that spaces are provided between both side portions of the first housing 11 and both side wall portions of the recess 10, respectively. The space is a space portion for opening and closing the arms 20 of the lid 1, which will be described later, and has a semi-cylindrical shape, for example.

The space between the negative X-direction end of the first housing 11 and the wall of the recess 10 serves as a first receiving portion 14 for receiving the first end 5a of the torsion coil spring 5.

At the negative X-direction end of the first housing 11, a first axial groove 12 is formed as a substantially arcuate region recessed positively in the Z-direction. The first shaft groove 12 accommodates a component in which the torsion coil spring 5 and the shaft 4 are assembled. As shown in fig. 3, the dimension of the first shaft groove 12 in the Y direction is matched to, for example, the outer diameter of the spiral portion 5b of the torsion coil spring 5 so that the spiral portion 5b fits into the first shaft groove 12.

At the end portion of the first housing 11 in the X-direction, a second axial groove 13 is formed as a substantially arcuate region recessed in the Z-direction. The second shaft groove 13 accommodates the shaft 4. As shown in fig. 3, the dimension in the Y direction of the second shaft groove 13 is matched to, for example, the outer diameter of the shaft 4 so that the shaft 4 fits into the second shaft groove 13.

That is, the first shaft groove 12 is shaped to hold the spiral portion 5b, and the second shaft groove 13 is shaped to hold the shaft 4, so that the shaft 4 and the torsion coil spring 5 can be prevented from rocking during the opening and closing movement.

A second housing portion 15, which is a substantially rectangular opening area recessed forward in the Z direction, is formed in a substantially central portion of the first housing 11. Referring to fig. 5B, the second housing portion 15 has an inner space that expands in diameter on the XY plane by the stepped structure of the first housing 11. The second receiving portion 15 receives a second end portion 5c of the torsion coil spring 5 and is inserted with a holder 2 described later.

Further, on the Y-direction negative side of the first housing 11 in the recess 10, a second housing 16 is formed. The second case 16 is projected in the negative Z direction from the plane of the recess 10, and the front surface thereof is parallel to the XY plane and positioned on the positive Z direction side of the plane of the front panel 3, so that the assembled cover 1 is brought into contact with the front surface of the second case 16.

The second housing 16 is formed over the entire recess 10 in the X direction, for example, and an opening 17, which is a substantially rectangular opening area recessed forward in the Z direction, is formed in a substantially central portion of the second housing 16. The opening 17 accommodates a device (not shown) such as a button or a switch, which is protected by the cover 1 having an opening/closing cover structure.

In the present embodiment, the first housing 11, the second housing 16, and the like are integrally molded to the front panel 3, but the front panel 3 as a base may not be provided as long as the functional parts such as the first shaft groove 12, the second shaft groove 13, the first housing 14, the second housing 15, and the opening 17 can be realized, and all or part of the functional parts may be configured to be separated from the front panel 3.

As shown in fig. 4A, the lid 1 is formed with a handle 22 protruding toward the near side (the Z direction negative side) on the Y direction negative side, and the lid 1 having the opening/closing lid structure is opened by pulling the handle 22 of the lid 1.

As shown in fig. 4A, the cover 1 has double arms 20 engaged with both ends of the shaft 4 on the Y-direction forward side. Among these, the arm on the negative X-direction side of the arms 20 is a first arm 20a, and the arm on the positive X-direction side of the arms 20 is a second arm 20b, and these are collectively referred to as the arms 20. The arms 20 each have a notch 23 and a shaft hole 24 provided so as to penetrate the X direction.

The assembly method when the double arms 20 are engaged with the shaft 4 will be described below with reference to fig. 4B. In fig. 4B, the assembly method for the second arm portion 20B to be engaged with the shaft 4 is shown along the line I-I in fig. 4A, but the same applies to the engagement of the first arm portion 20a, and therefore, the description thereof will be omitted.

As shown in fig. 4B, the second arm portion 20B has a notch portion 23 that opens on the positive Z-direction side, and the notch portion 23 has a reduced diameter shape in which the diameter gradually decreases toward the negative Z-direction side. Wherein the caliber of the joint of the notch 23 and the shaft hole 24 is smaller than or equal to the diameter of the shaft 4. For example, the diameter of the notch 23 at the junction with the shaft hole 24 may be smaller than the diameter of the shaft 4, that is, the minimum value of the diameter of the notch 23 in the reduced diameter shape may be smaller than the diameter of the shaft 4.

The shaft hole 24 is connected to the notch 23 on the negative Z-direction side of the notch 23, and has a diameter matching the diameter of the shaft 4.

When the second arm portion 20b is assembled to the shaft 4, engagement by a so-called Snap-fit (Snap-fit) method is adopted. That is, when the second arm portion 20b is biased to the positive Z-direction side, the notch portion 23 is elastically deformed, and the shaft 4 passes through the reduced-diameter notch portion 23 and is locked to the shaft hole 24. Further, the shaft 4 can be prevented from coming off the second arm portion 20b of the cover 1 with restoration of the deformation of the notch portion 23 after assembly.

Thus, the cover 1 is connected to the shaft 4 so as to be openable and closable by locking both ends of the shaft 4 to shaft holes 24 provided in the first arm portion 20a and the second arm portion 20b, respectively.

In addition, in the X direction, a space into which the holder 2 is inserted is formed between the arms 20 of the cover 1. As shown in fig. 1, the holder 2 has a pair of symmetrical flexible locking pieces 7 on the Z-direction forward side thereof. The flexible locking piece 7 is inserted into the space between the arms 20, and further inserted into and locked to the second housing 15, whereby the respective members are fixed to form an open/close cover structure in a closed state, as shown in fig. 5A.

Specifically, the pair of flexible locking pieces 7 are locked to the second receiving portion 15 in the first housing 11 by a so-called Snap-fit method. As shown in fig. 5B, the distal ends of the pair of flexible locking pieces 7 are formed in a claw shape, and have an expanded diameter shape in which the distance between the outer contours gradually increases in the Y direction as approaching the negative Z direction side. Wherein, the distance between the outer contours of the claw-shaped parts of at least one pair of flexible locking pieces 7 on the negative side of the Z direction is larger than the minimum value of the width of the second accommodating part 15 in the Y direction. By this, the retainer 2 is biased to the positive Z-direction side, and the flexible locking piece 7 is elastically deformed, passes through the first housing 11, and is locked to the second housing 15. Specifically, the pair of flexible locking pieces 7 are locked to the stepped structure of the first housing 11, and the stepped structure functions as a locking portion of the flexible locking piece 7 to prevent the holder 2 inserted into the second housing 15 from being separated from the second housing 15.

Then, the holder 2 is engaged with the second receiving portion 15, and the torsion coil spring 5 is received between the pair of flexible locking pieces 7 of the holder 2. At least the locked holder 2 is biased toward the second end 5c of the torsion coil spring 5, and the force is transmitted to the torsion coil spring 5 to bias the first end 5a of the torsion coil spring 5 toward the first arm 20a, thereby biasing the torsion coil spring 5 in the closing direction of the lid 1.

Further, the axial dimension of the torsion coil spring 5 is set such that the first end portion 5a and the second end portion 5c are abutted against the first arm portion 20a and the holder 2, respectively, and preferably the first end portion 5a and the second end portion 5c of the torsion coil spring 5 are not located on the same plane. That is, as shown in fig. 3, the first end portion 5a and the second end portion 5c of the torsion coil spring 5 have an included angle of less than 180 degrees when viewed from the axial direction of the shaft 4, so that the second end portion 5c protrudes to the Z-direction forward side when the first end portion 5a is parallel to the XY plane.

The first end 5a is shaped like a straight line, so that the first end 5a is convenient to be abutted against the first arm 20a; by forming the second end portion 5c in a U-shape, the contact area between the second end portion 5c and the holder 2 is increased, and the second end portion 5c of the torsion coil spring 5 is more stably brought into contact with the holder 2.

Further, from the viewpoint of further facilitating insertion of the holder 2 into the second housing portion 15 and appropriately biasing the second end portion 5c, the angle between the first end portion 5a and the second end portion 5c of the torsion coil spring 5 is preferably greater than 140 degrees and less than 160 degrees, more preferably greater than 140 degrees and less than 150 degrees.

Hereinafter, a method of assembling the respective members of the opening/closing cover structure configured as described above will be described with reference to fig. 1 to 5B. Firstly, the shaft 4 is penetrated through the torsion coil spring 5; next, the shaft 4 and the torsion coil spring 5 are held in the first shaft groove 12 and the second shaft groove 13; then, the cover 1 is buckled and fastened with the two ends of the shaft 4 through the notch 23 and the shaft hole 24; further, the holder 2 is engaged with the second housing 15, and the holder 2 biases the torsion coil spring 5 in the closing direction of the lid body 1.

The operation of the opening/closing cover structure assembled as described above will be described below. The cover 1 is opened by hanging the hand of the operator at the handle 22 provided to the cover 1 and pulling. At this time, the cover 1 is opened and closed about the shaft 4 passing through the arm 20. At this time, the first end 6a of the torsion coil spring 5 abutting against the first arm 20a of the cover 1 is biased by the first arm 20a to rotate so as to be pressed inward (positive Z direction side). Therefore, if the hand supported to hold the open state of the cover 1 is released, the cover 1 returns to the original closed state due to the original force applied to the torsion coil spring 5. Thus, the cover 1 is opened only when it is necessary to operate a device such as a button or a switch provided in the opening 17, and remains closed for the rest of the time.

The device held in the opening 17 of the opening/closing cover structure is not limited to a device such as a button or a switch, and may be any socket, microelectronic element, or the like that requires protection or dust-proof treatment.

As described above, the opening/closing cover structure according to an embodiment of the present utility model includes: a torsion coil spring 5; a shaft 4 passing through a spiral portion 5b of the torsion coil spring 5; a first shaft groove 12 and a second shaft groove 13 for supporting the shaft 4; a first housing portion 14 for housing a first end portion 5a of the torsion coil spring 5 outside the first shaft groove 12; a second housing portion 15 for housing a second end portion 5c of the torsion coil spring 5 located on the opposite side of the first end portion 5a between the first shaft groove 12 and the second shaft groove 13; the lid 1 having two arms 20 protruding from each other, the arms 20 each having a shaft hole 24 for holding both ends of the shaft 4 and a cutout 23 connected to the shaft hole 24; and a holder 2 for fixing the shaft 4 to the second housing 15 by snap-fitting, and biasing the torsion coil spring 5 in a direction in which the cover 1 is closed.

Therefore, through the opening and closing cover structure, a plurality of parts are not required to be simultaneously maintained during assembly, and the convenience of assembly is improved.

In addition, in the opening/closing cover structure according to the embodiment of the present utility model, the first storage portion 14 and the second storage portion 15 are preferably provided on the front panel 3.

Thus, the integrally formed front panel serves as a base of the opening/closing cover structure, and the opening/closing cover structure can be realized with a simple structure.

In the opening/closing cover structure according to the embodiment of the present utility model, the torsion coil spring 5 is preferably provided with a dimension in the axial direction such that the first end portion 5a abuts against the first arm portion 20a of the double arm 20 in the first housing portion 14 and the second end portion 5c abuts against the holder 2 in the second housing portion 15.

Thus, by properly setting the axial dimension of the torsion coil spring, the convenience of assembly is improved, and the automatic closing function of the opening and closing cover structure is reliably realized.

In addition, in the opening/closing cover structure according to the embodiment of the present utility model, the first end 5a is preferably in a straight shape, and the second end 5c is preferably in a U shape.

Therefore, the convenience of assembly is improved, the abutting strength between the second end part of the torsion coil spring and the retainer is ensured, and the automatic closing function of the opening and closing cover structure is further practically realized.

Further, the opening and closing cover structure of an embodiment of the present utility model preferably has an angle of less than 180 degrees between the first end 5a of the torsion coil spring 5 and the second end 5c of the torsion coil spring 5, as viewed in the axial direction of the torsion coil spring 5.

Thereby, the ease of assembly is further improved, and the proper abutment between the second end portion of the torsion coil spring and the holder is facilitated.

Further, the opening and closing cover structure of an embodiment of the present utility model preferably has an angle between the first end 5a of the torsion coil spring 5 and the second end 5c of the torsion coil spring 5 of more than 140 degrees and less than 150 degrees, as viewed from the axial direction of the torsion coil spring 5.

Thereby, the ease of assembly is further improved, and the realization of proper abutment between the second end portion of the torsion coil spring and the holder is further facilitated.

The embodiments of the present utility model are described above with reference to the drawings. The above-described embodiments are merely specific examples of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can make various modifications, combinations, and reasonable omissions of the elements and the embodiments based on the technical ideas of the present utility model, and the resulting approaches are also included in the scope of the present utility model.

Claims (6)

1. An opening/closing cover structure, comprising:

a torsion coil spring;

a shaft passing through a spiral portion of the torsion coil spring;

a first shaft groove and a second shaft groove for supporting the shaft;

a first housing portion that houses a first end portion of the torsion coil spring outside the first shaft groove;

a second receiving portion for receiving a second end portion of the torsion coil spring located on an opposite side of the first end portion between the first shaft groove and the second shaft groove;

a cover body having two arms protruding from each other, each of the two arms having a shaft hole for holding both ends of the shaft and a cutout portion connected to the shaft hole; and

and a holder for fixing the shaft to the second housing portion by snap-fastening, and biasing the torsion coil spring in a closing direction of the cover.

2. The opening and closing cover structure according to claim 1, wherein,

the first accommodating part and the second accommodating part are arranged on the front panel.

3. The opening and closing cover structure according to claim 1 or 2, wherein,

the torsion coil spring has an axial dimension such that the first end portion abuts against a first arm portion of the two arms in the first housing portion and the second end portion abuts against the holder in the second housing portion.

4. The opening and closing cover structure according to claim 1 or 2, wherein,

the first end part is in a straight shape, and the second end part is in a U shape.

5. The opening and closing cover structure according to claim 1 or 2, wherein,

an angle between the first end of the torsion coil spring and the second end of the torsion coil spring is less than 180 degrees when viewed in an axial direction of the torsion coil spring.

6. The opening and closing cover structure according to claim 5, wherein,

an included angle between the first end of the torsion coil spring and the second end of the torsion coil spring is greater than 140 degrees and less than 150 degrees when viewed from an axial direction of the torsion coil spring.