JP2007169876A - Opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new opening/closing device which can maintain a stable opening/closing operation over a long period of time by securing a large storage space. <P>SOLUTION: This opening/closing device comprises: a box-shaped storage-part body with an opened front surface; a lid part for covering an opened part of the front surface of the storage-part body; and one or more arms for supporting the lid part on the storage-part body. The opening/closing device is equipped with an elastic means for imparting an urging force in the direction of opening the lid part, when the lid part is in an opened state. The opening/closing device is characterized particularly by using a spiral spring as the elastic means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an opening / closing device configured such that a lid can be opened and closed with respect to a storage body.

  Recently, a so-called “flap-up type” opening / closing device has been developed in which the lid supported by the housing body via the arm is opened forward and upward. In such an opening / closing device, An elastic means is provided for applying a biasing force in a direction to open the lid when the lid is open.

  That is, the opening / closing device provided with such elastic means is urged in the direction in which the lid is opened when the lid is open, so that the stable open state is maintained, and the storage unit The operation of storing the article in the main body is simplified.

  Further, when the lid is in the open state, an urging force is applied in the direction to open the lid, while when the lid is in the closed state, the urging force is applied in a direction to press the lid against the storage unit body. An opening / closing device provided with elastic means is also developed, and in the opening / closing device provided with such elastic means, when the lid portion is closed, the lid portion is directed toward the housing portion main body. Since it is pressed toward the front, the opening part of the front surface of the storage unit main body is tightly closed by the lid part.

  Here, as an opening / closing device provided with such elastic means, there can be mentioned one having a structure as shown in the schematic view of FIG.

  The opening / closing device 1 shown in FIG. 1 has a box-shaped storage unit main body 2 whose front surface is opened, a lid 3 that covers the open part of the front of the storage unit main body 2, and the lid 3 is supported by the storage unit main body 2. The two arms 4 (the main arm 41 and the auxiliary arm 42) for carrying out the operation, and when the lid 3 is in the open state, while applying a biasing force in the direction to open the lid 3, When the portion 3 is in the closed state, elastic means 8 is provided that applies a biasing force in a direction in which the lid portion 3 is pressed against the storage portion main body 2.

  More specifically, in the opening / closing device 1, the two arms 4 are positioned at appropriate positions of the front plate portion 51 of the L-shaped mounting plate 5 that is fixed along the inner surface depth direction of the storage portion main body 2. (411, 421) and if the two arms 4 rotate clockwise in the figure by pivoting to the appropriate positions (412, 422) of the mounting portion 6 installed on the back surface of the lid portion 3, along with that The lid portion 3 is configured to open forward and upward.

  Further, as the elastic means 8 in the opening / closing device 1, from an appropriate position 521 in the lateral plate portion 52 of the L-shaped mounting plate 5 to a fulcrum 71 provided on the crank portion 7 protruding at the end of the main arm 41. A pulling spring that is stretched over in a tensioned state is used.

  That is, in the opening / closing device 1, when the lid 3 is in a closed state covering the front opening of the storage unit main body 2, the main arm 41 is provided in the crank unit 7 from the pivot position 411 on the storage unit main body side 2. Since the position of the fulcrum 71 is the lower position in the figure, the urging force generated from the elastic body 8 is in a direction that prevents the arm 4 from rotating clockwise in the figure, and the lid 3 is pressed against the storage body 2. The open part on the front surface of the storage unit main body 2 is tightly closed by the lid part 3.

  On the other hand, when the lid 3 is opened forward and upward against the urging force generated from the elastic body 8, the urging force is exerted in a direction that prevents the arm 4 from rotating clockwise in the drawing until the position shown in FIG. However, when the position is exceeded, as shown in FIG. 2 (b), the position of the fulcrum 71 provided in the crank part from the pivot position 411 on the storage body 2 side of the main arm 41 is changed. Since it is in the upper position in the figure, the urging force generated from the elastic body 8 changes to a direction that assists the counterclockwise rotation of the arm 4 in the figure and becomes an auxiliary force in the direction in which the lid 3 is opened, and is stable. The open state is maintained.

  However, in the opening / closing device provided with such elastic means, the coil spring is attached along the depth direction of the storage unit main body in the stretched state, and therefore the dimension of the storage unit main body in the depth direction is the extended coil spring. There is a problem that the shape and size of the storage unit main body is limited, and the stretched coil spring is bulky installed in the storage unit main body. There has been a problem that a large storage space in the storage body cannot be secured.

  In view of this point, a door opening / closing mechanism that requires a small mounting space for a storage body such as a storage main body and has a clean appearance has been proposed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2005-264719

  In other words, this door opening / closing mechanism has a coil spring or a gas spring attached to the back side of the door (lid portion), and is configured in this manner, so that the installation space required for the storage body itself is reduced. In addition, since the coil spring is located on the back side of the lid portion regardless of the position of the lid portion, it is configured so that it is not visible from the front during use.

  However, even in the opening / closing device in which the coil spring is attached to the back surface of the lid portion, since the bulky coil spring or gas spring is still used, the size of the lid portion is set to be longer than the length of the coil spring or gas spring. There is a problem that the necessity and the shape and size of the lid are limited to some extent.

  In addition, since the coil spring and the gas spring are bulky installed on the back surface of the lid portion, when the lid portion is to be closed after a large amount of articles such as luggage is stored in the storage body, the coil spring or gas spring is used. However, the storage space in the main body of the storage unit has not been secured so much, because the door does not close when it comes into contact with the baggage or the item, and the work of storing the item such as the baggage again becomes necessary.

  Therefore, as a result of intensive studies to solve such a problem, the present inventor, as a result, a box-shaped storage unit main body whose front surface is opened, a lid that covers the open part of the front surface of the storage unit main body, An opening / closing device comprising one or more arms for supporting the lid on the storage body, wherein the opening / closing device has a biasing force in a direction to open the lid when the lid is open. In particular, the present invention has completed an opening / closing device (hereinafter referred to as a device of the present invention) characterized in that a spiral spring is used as the elastic means.

  That is, the present inventor has a relatively compact structure as an elastic means in an opening / closing device provided with an elastic means for applying a biasing force in a direction to open the lid when the lid is in an open state. It was found that a large storage space in the storage body can be secured by using the spiral spring.

  In general, spiral springs are less expensive than coil springs, so it is possible to reduce the cost of switchgears. In addition, spiral springs have a small decrease (deterioration) in elastic force due to repeated use. It was also found that the stable operation of the switchgear can be maintained over a long period of time.

  The present invention has been completed on the basis of the above knowledge, and aims to provide a novel switchgear that realizes a large storage space and that can maintain a stable switching operation over a long period of time. To do.

The device of the present invention, which is a means for solving the above problems, includes a box-shaped storage unit body whose front surface is open, a lid that covers the open part of the front surface of the storage unit body, and the lid unit supported by the storage unit body. An opening / closing device comprising one or more arms for providing an elastic means for applying a biasing force in a direction to open the lid when the lid is open. In particular, a spiral spring is used as the elastic means.
Hereinafter, the apparatus of the present invention will be described in detail.

  The device according to the present invention includes a box-shaped storage unit main body whose front surface is opened, a lid that covers the opening of the front surface of the storage unit main body, and one or more arms for supporting the lid on the storage unit main body. The opening / closing device is not particularly limited, and is generally an opening / closing device called a “flap-up type”.

  Further, in the device of the present invention, when the lid portion is in the open state, there is provided elastic means for applying a biasing force in the direction of opening the lid portion. In the open state, the lid is biased in the opening direction, so that a stable open state is maintained, and the operation of storing the article in the storage unit main body is simplified.

  In particular, in the device of the present invention, when the lid portion is in the open state, an urging force is applied in the direction of opening the lid portion, while when the lid portion is in the closed state, the lid portion is placed on the storage unit main body. It is preferable to provide elastic means for applying an urging force in the pressing direction, and by providing such elastic means, the lid portion is further pressed toward the housing body when the lid portion is in the closed state. The open part on the front surface of the storage unit body can be tightly closed by the lid.

  In the device of the present invention, the size, shape, and material of the storage unit main body and the lid may be appropriately determined according to various uses of the device of the present invention and the required design, and are not particularly limited. It is not something.

  The arm is not particularly limited as long as it has a physical strength that does not cause significant deformation or breakage due to the opening / closing operation of the device of the present invention. It may be a plate-like one, and is not limited to a straight rod-like body, a front view, or a substantially rectangular plate-like body. A plate-like body such as a circle may be used.

  In addition, in the present invention, a member having a structure in which a plurality of shafts slide and extend, or a member such as a gas damper, an oil damper, or a gas spring may be used as the arm.

  The apparatus according to the present invention has the greatest feature in that a spiral spring is used as the elastic means.

  That is, in the present invention, a relatively compact structure is used as the elastic means in the switchgear that is provided with elastic means for applying a biasing force in the direction of opening the lid when the lid is open. Therefore, a large storage space in the storage unit main body can be secured.

  In general, spiral springs are less expensive than coil springs, so it is possible to reduce the cost of switchgears. In addition, spiral springs have a small decrease (deterioration) in elastic force due to repeated use. The stable operation of the switchgear can be maintained over a long period of time.

  Here, the spiral spring provided in the device of the present invention has an attached state in which an urging force is applied in a direction to open the lid when at least the lid is open, or when the lid is open. , While applying a biasing force in the direction of opening the lid, while the lid is in a closed state, if the mounting state is to apply a biasing force in the direction of pressing the lid against the storage unit body, The mounting state is not particularly limited, but in the present invention, in order to reduce the number of parts and make the mounting state compact, the elastic force generated from the spiral spring is transmitted to at least one arm. In the determination of the position of the fulcrum, when the lid is closed, the pivot point on the storage unit main body side of the arm is the position of the fulcrum or the action of the fulcrum and the spiral spring. On the other hand, when the lid is in an open state, the pivot point on the storage unit main body side of the arm is the position of the fulcrum, or the point of action of the fulcrum and the spiral spring. It is preferable to be in a position below a straight line formed by.

  That is, when the position of the fulcrum is determined and the spiral spring is provided in this way, when the lid is in a closed state covering the opening on the front surface of the storage unit body, the pivot point on the storage unit body side of the arm is Since the position of the fulcrum or above the straight line formed by the fulcrum and the point of action of the spiral spring is present, the urging force generated from the elastic body prevents the arm from rotating in the direction to open the cover, and the cover is the storage part. When pressed against the main body, the open part of the front surface of the storage unit main body is tightly closed by the lid.

  On the other hand, when the lid is opened forward and upward against the urging force generated from the elastic body, when the lid is in the open state, the pivot point of the arm is the position of the fulcrum or the fulcrum. Since it is below the straight line formed by the point of action of the spiral spring, the urging force generated from the elastic body becomes an auxiliary force in the direction of opening the lid, and a stable open state is maintained.

  In addition, as a specific example of the attachment state of such a spiral spring, the attachment state as described in the following (1)-(4) can be mentioned, for example.

  (1) The point of action of the spiral spring is directly attached to a fulcrum provided on at least one arm.

  (2) A crank portion protruding from at least one arm is provided, and an action point of the spiral spring is directly attached to a fulcrum provided in the crank portion.

  (3) The point of action of the spiral spring is attached to a fulcrum provided on at least one arm via a bridging member.

  (4) A crank portion protruding from at least one arm is provided, and an action point of the spiral spring is attached to a fulcrum provided in the crank portion via a bridging member.

  In the present invention, any of the above attachment means (1) to (4) may be adopted. However, as compared with the case where the arm is directly provided with the fulcrum, the arm is provided with the crank portion and the crank portion. There is an advantage that the elastic force generated from the spiral spring can be more strongly transmitted to the arm.

  Further, compared to the case where the action point of the spiral spring is directly attached to the fulcrum, the attachment via the bridging member has the advantage that the spiral spring has less fatigue and the degree of freedom of the attachment position of the spiral spring is increased. .

  The bridging member has physical strength that does not cause significant deformation or breakage due to the opening / closing operation of the device of the present invention, and can efficiently transmit the elastic force generated from the spiral spring to the arm. There is no particular limitation as long as it is a rod-like or plate-like one, and it is also a straight rod-like body or a substantially rectangular plate-like body when viewed from the front. Not limited to this, it may be bent halfway, or may be a plate-like body such as a front view, a substantially triangular shape, or a substantially circular shape.

  In particular, in the present invention, it is preferable to use a bridging member having a variability capable of adjusting its length. If the length of the bridging member is variable as described above, it is only necessary to change the length appropriately. The elastic force generated from the spiral spring can be controlled, and the biasing force applied to the opening and closing of the door can be adjusted accordingly, or when the elastic force of the spiral spring decreases, the length of the bridging member can be adjusted. It can be shortened to maintain the generated elastic force.

  Here, a method for adjusting the length of the bridging member is not particularly limited. Specifically, for example, the bridging member includes a plurality of members, and the plurality of members slide appropriately. Means that make it possible to adjust the length, make the length adjustable by changing the coupling position of multiple members, or make the length adjustable by increasing or decreasing the number of multiple members And so on.

  In the present invention, it is preferable that the installation position of the spiral spring can be changed in order to control the elastic force generated from the spiral spring or to maintain the generated elastic force.

  That is, when the installation position of the spiral spring is moved away from the fulcrum of the arm, the elastic force generated from the spiral spring becomes stronger. On the other hand, when the installation position of the spiral spring is brought closer to the fulcrum of the arm, the elastic force generated from the spiral spring becomes weaker. Thus, the elastic force generated from the spiral spring can be controlled.

  Furthermore, in the present invention, it is preferable that the installation angle of the spiral spring can be changed in order to control the elastic force generated from the spiral spring or to maintain the generated elastic force.

  That is, since the degree of restriction of the spiral spring is changed by changing the installation angle of the spiral spring, the elastic force generated from the spiral spring can be controlled.

  Here, the method for adjusting the installation position and the installation angle of the spiral spring is not particularly limited. Specifically, for example, a guide is provided at the installation position of the spiral spring, and the spiral spring is moved along the guide. The spiral spring is fixed by using a fixing member or the like at a desired position so that it can be slid, or by squeezing or loosening the spiral spring by using a rotatable member as the fixing member. A means for making it possible to adjust the installation angle can be mentioned.

  By the way, as in the apparatus of the present invention, a box-shaped storage unit main body whose front surface is opened, a lid that covers the open part of the front surface of the storage unit main body, and one or more for supporting the lid on the storage unit main body. In many cases, one or more arms for supporting the lid on the storage unit main body are provided on the left and right inner side surfaces of the storage unit main body. If they do not match, the lid may be twisted, or the smooth opening and closing of the lid may be hindered.

  Therefore, in the apparatus of the present invention, in the case where one or more arms for supporting the lid portion on the storage unit body are provided on the left and right sides of the inner surface of the storage unit body, at least a pair of left and right of the arms are connected by a connecting means In addition, it is preferable that the pair of left and right arms are configured to move in a right-and-left manner.

  As a specific example of the connecting means, a plate-like or bar-like member spanned from an appropriate position of one arm to an appropriate position of the other arm can be mentioned.

  In the device of the present invention, it is preferable that the connecting means is attached in the vicinity of the pivot point on the lid portion side of the arm, and the connecting means closes to the lid portion with the lid portion closed. More preferably, it is attached to.

  The reason for this is that if the connecting means is attached in the vicinity of the pivot point on the lid side of the arm, the connecting means is hidden behind the lid when the lid is opened, and the connecting means is not visible from the user side. This is because the beauty of use of the device of the present invention is not impaired, and if the connecting means is attached so as to be close to the lid portion, the storage space of the storage body is not impaired due to the bulk of the connecting means. .

  The present invention is a novel opening / closing device having the above-described configuration, realizing a large storage space and capable of maintaining a stable opening / closing operation over a long period of time.

  That is, in the present invention, when the lid portion is in the open state, this type has a relatively compact structure as the elastic means in the opening / closing device provided with elastic means for applying a biasing force in the direction of opening the lid portion. Since the spiral spring is used, a large storage space in the storage unit body can be secured.

  In general, spiral springs are less expensive than coil springs, so it is possible to reduce the cost of switchgears. In addition, spiral springs have a small decrease (deterioration) in elastic force due to repeated use. The stable operation of the switchgear can be maintained over a long period of time.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

  FIG. 3 is a schematic diagram ((a) side view, (b) front view) showing the switchgear 1 of the present invention according to the first embodiment. The switchgear 1 has a box-shaped storage with the front surface opened. A main body 2, a lid 3 covering an open portion of the front surface of the storage unit main body 2, and two arms 4 (main arm 41 and auxiliary arm 42) for supporting the lid 3 on the storage unit main body 2. Become.

  Further, in the opening / closing device 1, when the lid portion 3 is in the open state, an urging force is applied in a direction to open the lid portion 3, while when the lid portion 3 is in the closed state, the lid portion 3 Is provided with a spiral spring as elastic means 8 for applying an urging force in the direction in which the storage unit body 2 is pressed.

  More specifically, in the opening / closing device 1, both ends of the two arms 4 are respectively disposed at appropriate positions (411, 421) of the mounting plate 5 fixed to the inner surface of the storage body 2 and the back surface of the lid 3. When the two arms 4 are rotated clockwise in the figure by pivoting to the appropriate positions (412, 422) of the installed mounting portion 6, the lid portion 3 is opened forward and upward accordingly. It is configured.

  Further, the spiral spring as the elastic means 8 in the opening / closing device 1 is fixed by the fixing member 10 in the middle of the mounting plate 5 and protrudes at the end of the main arm 41 on the storage unit main body 2 side. An action point 81 of a spiral spring is attached to a fulcrum 71 provided at 7 via a bridging member 9.

  As shown in the front view of FIG. 3B, in this embodiment, the arm 4 is provided on the left and right sides of the inner surface of the storage unit body 2, and a pair of left and right auxiliary arms 42 are connected. They are connected via means 13.

  More specifically, the connecting means 13 is attached in the vicinity of the pivot point 422 on the lid 3 side of the pair of left and right auxiliary arms 42 by a fastening member such as a screw, and when the lid 3 is closed. The connecting means 13 is attached so as to snuggle up to the lid 3.

  In the opening / closing device 1, when the lid 3 is in a closed state covering the open part of the front surface of the storage unit body 2 as shown in FIG. 3, the pivot point 411 of the main arm 41 on the storage unit body 2 side is The urging force generated from the elastic body 8 prevents the arm from rotating in the direction to open the lid 3 because the fulcrum 71 and the action point 81 of the spiral spring are formed. When pressed against the main body 2, the opening part of the front surface of the storage unit main body 2 is closed tightly by the lid 3.

  On the other hand, when the lid 3 is opened forward and upward against the urging force generated from the elastic body 8, the urging force is applied in a direction that prevents the arm 4 from rotating clockwise in the drawing up to the position shown in FIG. However, when the position is exceeded, as shown in FIG. 4B, the pivot point 411 of the main arm 41 on the storage unit body 2 side is the fulcrum 71 and the point of action 81 of the spiral spring. Therefore, the urging force generated from the elastic body 8 becomes an assisting force in the direction of opening the lid portion 3, and a stable open state is maintained.

  In particular, in the switchgear 1 of the present invention according to the present embodiment, a spiral spring having a relatively compact structure is used as the elastic means 8, so that a large storage space in the storage body 2 can be secured. is there.

  In this embodiment, if a bridging member 9 having a variability capable of adjusting its length as shown in the enlarged view of FIG. 5 is used, the elasticity generated from the spiral spring by simply changing the length is used. The force can be controlled, and the biasing force applied to the opening and closing of the lid 3 can be adjusted accordingly, or when the elastic force of the spiral spring is reduced, the length of the bridging member 9 is shortened. In other words, the elastic force generated can be maintained.

  Further, in this embodiment, for fixing the spiral spring to the mounting plate 5, as shown in the enlarged view of FIG. 6, a guide 51 is provided at the installation position of the spiral spring on the mounting plate 5, and the spiral is moved along the guide 51. If the spring is configured to be slidable so that the installation position of the spiral spring can be fixed using the fixing member 10 at a desired position, the elastic force generated from the spiral spring can be controlled. Also by this means, it is possible to appropriately adjust the urging force applied to the opening and closing of the lid portion 3 or to maintain the elastic force generated when the elastic force of the spiral spring is lowered.

  Furthermore, in this embodiment, if a fixing member 10 having a lever 11 as shown in the enlarged view of FIG. 7 is used, by changing the mounting angle of the lever appropriately with the adjusting screw 12, The installation angle can be adjusted, and the elastic force generated from the spiral spring can be controlled by squeezing or loosening the spiral spring. By this means, the biasing force applied to the opening and closing of the lid 3 can be adjusted as appropriate. Alternatively, the elastic force generated when the elastic force of the spiral spring is reduced can be maintained.

  FIG. 8 is a schematic diagram ((a) a side view in a closed state and (b) a side view in an open state) showing the opening / closing device 1 of the present invention according to a second embodiment. The box-shaped storage unit main body 2, the lid 3 covering the open part of the front of the storage unit main body 2, and two arms 4 (main arm 41 for supporting the lid 3 on the storage unit main body 2) The auxiliary arm 42).

  The spiral spring as the elastic means 8 in the opening / closing device 1 is fixed by using the fixing member 10 in the middle of the mounting plate 5, and is provided at the end of the main arm 41 on the storage unit main body 2 side. The action point 81 of the spiral spring is directly attached to the fulcrum 71.

  That is, in this opening / closing device 1, when the lid 3 is in a closed state covering the open part of the front surface of the storage unit body 2 as shown in FIG. 8A, the main arm 41 is pivotally attached to the storage unit body 2 side. Since the point 411 is located above the fulcrum 71, the urging force generated from the elastic body 8 prevents the arm 4 from rotating in the direction of opening the lid 3, and the lid 3 is pressed against the storage unit body 2. The open part on the front surface of the storage unit main body 2 is tightly closed by the lid part 3.

  On the other hand, when the lid portion 3 is opened against the urging force generated from the elastic body 8, as shown in FIG. 8 (b), the pivot point 411 of the main arm 41 on the storage portion main body 2 side is Since it exists in the position below the fulcrum 71, the urging | biasing force which arises from the elastic body 8 becomes auxiliary force to the direction which opens the cover part 3, and the stable open state is maintained.

  The rest is almost the same as in the first embodiment, and the description is omitted here to avoid repetition.

  FIG. 9 is a schematic diagram ((a) a side view in a closed state and (b) a side view in an open state) showing the opening / closing device 1 of the present invention according to a third embodiment. The box-shaped storage unit main body 2, the lid 3 covering the open part of the front of the storage unit main body, and two arms 4 (main arm 41, for supporting the lid 3 on the storage unit main body 2) An auxiliary arm 42).

  The spiral spring as the elastic means 8 in the opening / closing device 1 is fixed to the middle of the mounting plate 5 by using the fixing member 10 and is provided in the crank portion 7 protruding at the end of the main arm 41. The action point 81 of the spiral spring is directly attached to the fulcrum 71.

  That is, in this opening / closing device 1, when the lid 3 is in a closed state covering the open part of the front surface of the storage unit main body 2 as shown in FIG. 9A, the main arm 41 is pivotally attached to the storage unit main body 2 side. Since the point 411 is located above the fulcrum 41, the urging force generated from the elastic body 8 hinders the rotation of the arm 4 in the direction to open the lid 3, and the lid 3 is pressed against the storage unit body 2. The open part on the front surface of the storage unit main body 2 is tightly closed by the lid part 3.

  On the other hand, when the lid 3 is opened against the urging force generated from the elastic body 8, as shown in FIG. 9 (b), the pivot point 411 on the storage unit body 2 side of the main arm 41 is a fulcrum. Therefore, the urging force generated from the elastic body 8 becomes an auxiliary force in the direction of opening the lid portion 3, and a stable open state is maintained.

  The rest is the same as in the first embodiment, and the description is omitted here to avoid repetition.

  10A and 10B are schematic views ((a) a side view in a closed state and (b) a side view in an open state) showing the switchgear 1 of the present invention according to a fourth embodiment. The box-shaped storage unit main body 2, the lid 3 covering the open part of the front of the storage unit main body 2, and two arms 4 (main arm 41 for supporting the lid 3 on the storage unit main body 2) The auxiliary arm 42).

  The spiral spring as the elastic means 8 in the opening / closing device 1 is fixed to the middle of the mounting plate 5 using the fixing member 10 and is provided at the end of the main arm 41 via the bridging member 9. An action point 81 of a spiral spring is attached to the fulcrum 71.

  That is, in this opening / closing device 1, when the lid portion 3 is in a closed state covering the open portion on the front surface of the storage portion main body 2 as shown in FIG. 10A, the main arm 41 is pivotally attached to the storage portion main body 2 side. Since the point 411 is located above the straight line formed by the fulcrum 71 and the spiral spring action point 81, the urging force generated from the elastic body 8 prevents the arm 4 from rotating in the direction to open the lid 3, and the lid 3 is pressed against the storage unit main body 2, and the open part of the front surface of the storage unit main body 2 is tightly closed by the lid 3.

  On the other hand, when the lid 3 is opened against the urging force generated from the elastic body 8, as shown in FIG. 10 (b), the pivot point 411 on the storage unit body 2 side of the main arm 41 becomes a fulcrum. Therefore, the biasing force generated from the elastic body 8 serves as an auxiliary force in the direction of opening the lid 3 and a stable open state is maintained. .

  The rest is the same as in the first embodiment, and the description is omitted here to avoid repetition.

  FIG. 11 is a schematic diagram ((a) a side view in a closed state and (b) a side view in an open state) showing the opening / closing device 1 of the present invention according to a fifth embodiment. The box-shaped storage unit main body 2, the lid 3 covering the open part of the front surface of the storage unit main body 2, and one arm 4 for supporting the lid 3 on the storage unit main body 2.

  The arm 4 is composed of an outer cylinder and a slide bar, and the length of the arm 4 can be changed by sliding the slide bar along the outer cylinder.

  The spiral spring as the elastic means 8 in the opening / closing device 1 is fixed to the middle of the mounting plate 5 using the fixing member 10, and the crank protruding at the end of the arm 4 via the bridging member 9. An action point 81 of a spiral spring is attached to a fulcrum 71 provided on the portion 7.

  That is, in this opening / closing device 1, when the lid portion 3 is in a closed state covering the open portion on the front surface of the storage portion main body 2 as shown in FIG. 10A, the pivot point on the storage portion main body 2 side of the arm 4 Since 411 exists above the straight line formed by the fulcrum 71 and the spiral spring action point 81, the biasing force generated from the elastic body 8 prevents the arm 4 from rotating in the direction to open the lid 3, and the lid 3 Is pressed against the storage unit main body 2, and the open part of the front surface of the storage unit main body 2 is closed tightly by the lid 3 (at this time, the arm 4 is stored in the storage unit main body in a contracted state). .

  On the other hand, when the lid 3 is opened against the urging force generated from the elastic body 8, as shown in FIG. 10B, the pivot point 411 on the storage unit body 2 side of the arm 4 becomes the fulcrum 71. Therefore, the urging force generated from the elastic body 8 becomes an auxiliary force in the direction of opening the lid portion 3 and a stable open state is maintained ( At this time, the arm is in an extended state, and the lid is opened more greatly.)

  The rest is the same as in the first embodiment, and the description is omitted here to avoid repetition.

FIG. 1 is a schematic view showing a conventionally known switchgear. FIG. 2 is a schematic diagram showing an operating state of a conventionally known switchgear. FIG. 3 is a schematic diagram illustrating the switchgear according to the first embodiment of the present invention. FIG. 4 is a schematic diagram illustrating an operating state of the switchgear according to the first embodiment of the present invention. FIG. 5 is a schematic diagram showing a state in which the elastic force is controlled by changing the length of the bridging member in the opening / closing device of the present invention. FIG. 6 is a schematic diagram showing a state in which the elastic force is controlled by changing the installation position of the spiral spring in the opening / closing device of the present invention. FIG. 7 is a schematic diagram showing a state in which the elastic force is controlled by changing the installation angle of the spiral spring in the opening / closing device of the present invention. FIG. 8 is a schematic diagram illustrating the switchgear according to the second embodiment of the present invention and the operating state thereof. FIG. 9 is a schematic diagram illustrating the switchgear according to the third embodiment of the present invention and the operating state thereof. FIG. 10 is a schematic diagram illustrating the switchgear according to the fourth embodiment of the present invention and the operating state thereof. FIG. 11 is a schematic diagram illustrating the switchgear according to the fifth embodiment of the present invention and the operating state thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening / closing device 2 Storage part main body 3 Cover part 4 Arm 5 Mounting plate 6 Mounting part 7 Crank member 8 Elastic member 9 Bridging member 10 Fixing member 13 Connecting member

Claims (11)

  An opening / closing device comprising a box-shaped storage unit main body with the front surface opened, a lid unit covering the open part of the front surface of the storage unit main unit, and one or more arms for supporting the lid unit on the storage unit main unit. The opening / closing device is provided with an elastic means for applying an urging force in a direction to open the lid when the lid is in an open state. In particular, a spiral spring is used as the elastic means. Opening and closing device characterized.   When the lid is open, an urging force is applied in a direction to open the lid, while when the lid is in a closed state, an elastic force is applied to the urging force in a direction to press the lid against the storage unit body. The switchgear according to claim 1, further comprising means.   At least one arm is provided with a fulcrum for transmitting the elastic force generated from the spiral spring to the arm, and when the lid is in the closed state, the pivot point on the storage body side of the arm is At the position of the fulcrum or above the straight line formed by the fulcrum and the action point of the spiral spring, on the other hand, when the lid is in the open state, the pivot point on the storage unit main body side of the arm is the fulcrum The switchgear according to claim 1 or 2, wherein the position of the fulcrum is determined so that the position is below a straight line formed by the position or the fulcrum and an action point of the spiral spring.   The switchgear according to claim 3, wherein the point of action of the spiral spring is directly attached to a fulcrum provided on at least one arm.   The opening / closing apparatus according to claim 3, wherein a crank portion protruding from at least one arm is provided, and a point of action of the spiral spring is directly attached to a fulcrum provided on the crank portion.   The switchgear according to claim 3, wherein an action point of the spiral spring is attached to a fulcrum provided on at least one arm via a bridging member. The opening / closing apparatus according to claim 3, wherein a crank portion protruding from at least one arm is provided, and an action point of a spiral spring is attached to a fulcrum provided on the crank portion via a bridging member.   The switchgear according to claim 6 or 7, wherein the elastic force generated from the spiral spring is controlled by changing the length of the bridging member.   The switchgear according to any one of claims 1 to 8, wherein an elastic force generated from the spiral spring is controlled by changing a setting position of the spiral spring.   The switchgear according to any one of claims 1 to 8, wherein an elastic force generated from the spiral spring is controlled by changing an installation angle of the spiral spring. 11. One or more arms for supporting the lid on the storage unit body are provided on the left and right inner side surfaces of the storage unit body, and at least a pair of left and right of the arms is connected by a connecting means. The switchgear according to any one of the above.

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