KR20070089400A - Hinge device and storage having the same - Google Patents

Abstract

A hinge device is provided to reduce costs for components, and to improve productivity of products by integrating and simplifying constructions for free stop operation and slow down operation. A hinge device connecting a storage main body to a door comprises a housing(110), a shaft(120), a first cam member(130), a second cam member(140) and an elastic member(150). The housing is filled with oil in the inside. The shaft has one end coupled to the door in an outer side of the housing, and the other end extended to inside the housing. The first cam member is installed inside the housing so as to allow translational movement. The second cam member is installed to be opposite to the first cam member so as to interact with the first cam member and induce the translational movement of the first cam member. The elastic member pressurizes the first cam member toward the second cam member. The first cam member limits oil in a first region(111) to be drained off toward a second region(112) through the first cam member.

Description

Hinge device and storage having the same

1 is a perspective view showing the appearance of the storage and the installation structure of the door according to the present invention.

Figure 2 is a side cross-sectional view showing the configuration of the reservoir according to the present invention.

3 and 4 is an exploded perspective view and a cross-sectional view showing the configuration of the hinge unit according to the first embodiment in the hinge device according to the present invention.

5 is a cross-sectional view taken along lines I-I and II-II in the housing of FIG.

FIG. 6 is an exploded view showing the cam part in the second cam member of FIG. 3; FIG.

Figure 7 is a cross-sectional view showing the operating state of the hinge device according to the position of the door in the reservoir according to the present invention.

8 and 9 are an exploded perspective view and a cross-sectional view showing the configuration of the hinge unit according to the second embodiment in the hinge device according to the present invention.

      * Description of symbols on the main parts of the drawings *

      10: body 20: door

      30: hinge device 31: hinge case

      100, 200: hinge unit 110: housing

      111: first region 112: second region

      113: oil communication passage 120: shaft

      130: first cam member 132: cam friction surface

      133: damping surface 135: flange

      140: second cam member 141: cover part

      142: cam surface 150: elastic member

      The present invention relates to a hinge device and a reservoir having the same, and more particularly, to a hinge device capable of implementing a free stop operation and a slow down operation as a simple structure, and a reservoir having such a hinge device.

      Storage bins for storing and storing various objects or foods can be largely divided into an upper open type and a front open type according to the open position of the storage compartment. A representative example of the upper open type is a food storage commonly referred to as a kimchi refrigerator. Such a kimchi refrigerator generally includes a main body having a storage compartment with an open top, a door installed at an upper part of the main body for opening and closing the storage compartment, and a hinge device provided to rotate the door in a vertical direction.

      However, unlike the storage of the front is open, in the storage of the upper opening as above, there is a problem that the user is injured if the body of the consumer is caught between the body and the door when the door free fall by its own weight. . In addition, even if the user is not injured in this way, if the free-falling door hits the main body without any restrictions, a large shock and noise is generated and the storage door and the main body is damaged or offended to the user.

      Therefore, in recent years, the door is kept stationary when the door is opened at a predetermined angle or more by a buffer hinge device using a cam member and a damper member (free stop operation), and the door is smoothly in an area outside the free stop region. Although it can be closed at a low speed (slowdown operation), Korean Patent Publication No. 2005-0083456 discloses an example of such a hinge device.

      The conventional free stop and slow down hinge apparatus disclosed in the present invention includes a housing fixed to the storage main body side and a door side cam member integrally formed on a first shaft fixed to the door side and installed on one side of the housing, and to the door side cam member. A pre-stop part correspondingly installed and including a main body side cam member which is linearly moved by the rotational movement of the door side cam member, and a first pressing member for pressing and supporting the main body side cam member; and the other side of the housing And a second shaft fixed to the door side, a rotating piston coupled to and integrated with the second shaft, and an inner space for accommodating the rotating piston and filling the fluid, and installed to prevent rotation in the inner space of the housing. And, the rotating piston is a slow down portion consisting of a chamber cover for preventing the departure from the fluid chamber; comprises a.

      However, such a conventional hinge device has a configuration for free-stop operation and a configuration for slow-down operation are separated from each other, the overall configuration of the hinge device is complicated to increase the parts cost, the product productivity is low.

      SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a hinge device capable of implementing a freestop operation and a slowdown operation with a simple configuration, and a storage having the hinge device.

A hinge device according to the present invention for achieving the above object is a hinge device for rotatably connecting the reservoir body and the door, the housing is filled with oil; and one end is coupled to the door from the outside of the housing, The other end may include a shaft extending inwardly of the housing; a first cam member installed inside the housing to allow translational movement with the first cam member to induce translational movement of the first cam member. And a second cam member installed to face the first cam member so that the first cam member is pushed toward the second cam member. The first cam member is disposed within the housing. When the specific position is reached, the interior of the housing is divided into a first region and a second region in the longitudinal direction of the housing so that oil in the first region supports the first cam member. It characterized in that limit the communication toward the second region.

      As such, when the first cam member or the second cam member rotates while the first cam member restricts the movement of oil, resistance is generated by oil located in the first region, and the door is closed slowly.

      An oil communication passage is provided in the first region so that oil can communicate in the longitudinal direction of the housing through the first cam member when the first cam member moves.

The oil communication passage may be composed of at least one oil communication groove formed in the inner surface of the housing along the longitudinal direction of the housing.

The first cam member may be installed to rotate together with the shaft during opening and closing of the door, and the second cam member may be fixed to the housing so as not to rotate together with the first cam member.

The first cam member has a wing portion having a cam friction surface interacting with the second cam member and a damping surface subjected to resistance by oil when the first cam member rotates, and the first cam member is characterized in that the first cam member It has a flange to limit the movement of oil when the position is reached.

      The second cam member has a cover portion covering one end portion of the housing, and a cam portion having a cam surface extending from the cover portion into the housing and interacting with the first cam member.

      The second cam member may be integrally formed with the shaft and configured to rotate together with the shaft during the opening and closing operation of the door.

      In this case, the second cam member has a wing having a cam friction surface interacting with the first cam member and a damping surface subjected to resistance by oil when the second cam member rotates.

      In addition, the first cam member has a cam portion having a cam surface for interacting with the second cam member, and the movement of oil is restricted as one end of the first cam member enters the second region.

      In addition, the reservoir according to the present invention includes a main body having an open top, a door for opening and closing an open upper part of the main body, and a hinge device for rotatably connecting the door to the main body, wherein the hinge device is A housing filled with oil; and one end coupled to the door at an outside of the housing, and the other end extending into the housing, the shaft being rotated when the door is opened and closed, and rotating together with the shaft. A first cam member installed to translate the inside of the housing; and a second cam member installed opposite to the first cam member to induce a translational motion of the first cam member; and the first cam member. And an elastic member for pressing the second cam member toward the second cam member, wherein the first cam member is in contact with the oil when the first cam member rotates in a state in which the movement of oil is restricted. It characterized in that it comprises a damping surface subjected to the resistance by.

      At this time, the inner space of the housing has an area in which an oil communication passage is provided so that oil can move past the first cam member as the first cam member translates.

      The first cam member may further include a flange portion formed to limit movement of oil when the first cam member reaches one end of the region.

The oil communication passage may be composed of at least one oil communication groove formed in the inner surface of the housing along the longitudinal direction of the housing.

      In addition, the reservoir according to the present invention includes a main body having an open top, a door for opening and closing an open upper part of the main body, and a hinge device for rotatably connecting the door to the main body, wherein the hinge device is The housing is filled with oil; and one end is coupled to the door from the outside of the housing and the other end is extended to the inside of the housing, the shaft which rotates when opening and closing the door; A first cam member installed therein; and a second cam member rotating together with the shaft and inducing a translational motion of the first cam member; and an elastic member for pressing the first cam member toward the second cam member. Including, wherein the first cam member is limited to the movement of the oil at a specific position during the translational movement section, the second cam member is the oil of the oil by the first cam member Copper characterized in that it comprises a damping surface subjected to resistance by the oil as it rotates in a controlled state.

      Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. 1 is a perspective view showing the appearance and installation structure of the door according to the invention, Figure 2 is a side cross-sectional view showing the configuration of the storage according to the present invention.

      As shown in FIG. 1 and FIG. 2, the reservoir according to the present invention includes a main body 10 having a storage compartment 11 having an open upper portion, and a main body 10 to open and close an upper portion of the storage compartment 11. It has a door 20 coupled to the top.

      The main body 10 has an inner case 12 having a storage compartment 11 formed therein so as to accommodate a container containing a storage such as kimchi, and an outer case 13 which is coupled to surround the inner case 12. And a heat insulating material 14 provided between the inner case 12 and the outer case 13 to insulate the storage compartment 11 from the outside. An outer surface of the inner case 12 is provided with an evaporation tube 15 for cooling the storage compartment 11 and a heater 16 installed together with the evaporation tube 15 to perform functions such as defrosting and aging. And the lower side of one side of the main body 10 is provided with a mechanical chamber 18 formed so that the compressor 17 and the like can be installed.

      The door 20 is coupled to the upper rear side of the main body 10 by the hinge device 30 to open and close the open upper portion of the storage compartment 11 while rotating in the vertical direction. To this end, coupling portions 21 are provided on both sides of the rear end of the door 20 to be coupled to the shaft 120 of the hinge device, and the door cover 22 is fixed to the coupling portion 21. In this case, the door 20 and the shaft 120 are configured to rotate together. That is, when the door 20 rotates during the opening and closing operation of the door 20, the shaft 120 is also configured to rotate accordingly.

      The hinge device 30 is configured to allow a free stop operation and a slow down operation during the opening and closing operation of the door 20. Here, the free stop operation is to allow the user to conveniently insert and remove the storage after opening the door 20, and stops the door 20 without stopping by its own weight in a state where the door 20 is opened at an angle. Say. In addition, the slow down operation is to prevent the user from being injured by free fall when the door 20 is closed, and refers to an operation of slowly closing the door 20 by the deceleration means in the hinge device 30.

      As shown in FIG. 1, the hinge device 30 is fixed to an upper portion of the main body 10 and has hinge hinges 32 and a hinge case 31 mounted at both ends thereof, and two hinge cases 31 mounted inside the hinge case 31. It has a hinge unit 100.

      3 and 4 are an exploded perspective view and a cross-sectional view showing the configuration of the hinge unit according to the first embodiment in the hinge device according to the present invention. Since the two hinge units 100 have the same configuration, one hinge unit will be described below.

      3 and 4, the hinge unit 100 is a housing 110 is filled with oil therein, one end is coupled to the door 20 on the outside of the hinge case 31 and the other end of the housing ( The shaft 120 extending inwardly of the 110, the first cam member 130 installed inside the housing 110 to allow translational movement along the longitudinal direction of the housing 110, and the first cam member ( The second cam member 140 and the first cam member 130 which are installed to face the first cam member 130 to induce the translational motion of the first cam member 130 by interacting with the 130; It is configured to include an elastic member 150 for pressing toward the second cam member 140.

      In the present invention, the elastic force of the elastic member 150 for pressing the first cam member 130 toward the second cam member 140 is designed to overcome the weight of the door 20 to free stop operation of the door 20. This is implemented. In particular, when the first cam member 130 reaches a specific position during the translational movement section, the interior of the housing 110 is divided into a first region 111 and a second region 112, and thus the oil in the first region 111 is increased. The first cam member 130 is configured to restrict communication with the second area through the first cam member 130. In this way, the first cam member 130 is opened in the first region 111 in a state where the oil is restricted. When rotated together with the first cam member 130 or the second cam member 140 is subjected to a slow down operation of the door 20 is subjected to the resistance by the oil. 3 illustrates that the first cam member 130 is configured to rotate together with the door 20 such that the rotational resistance received by the first cam member 130 when the door 20 is closed slows down the door 20. This is the case of inducing an action.

      Thus, when the prestop operation and the slowdown operation are implemented through the pair of cam members 130 and 140, the hinge device does not have to provide a separate damping unit for implementing the slowdown operation. There is an advantage to getting lost.

      Hereinafter, the detailed configuration of the hinge unit 100 will be described in detail. 5A is a cross-sectional view of the housing taken along the line I-I in FIG. 3, FIG. 5B is a cross-sectional view of the housing taken along the line II-II, and FIG. 6 is an exploded view showing the cam part in the second cam member of FIG.

      As shown in FIGS. 3 and 5A, in the first region 111 inside the housing 110, oil is formed in the first cam member 130 when the first cam member 130 translates in the first region 111. An oil communication passage 113 is provided to allow communication in the longitudinal direction of the housing 110 through 130, and the oil communication passage 113 rotates smoothly in the free stop section (see FIG. 2) of the door 20. It is to make it possible. That is, when the door 20 rotates in the free stop section, the first cam member 130 makes a linear movement from side to side in the first region 111. In this case, the oil communication passage 113 is formed in the first region 111. If the first cam member 130 is not resisted by the oil does not smoothly rotate the door 20 is required, the oil communication passage 113 as described above is required. The oil communication passage 113 may be embodied in various forms as long as it allows oil to pass through the first cam member 130 when the first cam member 130 moves. However, in the present embodiment, the housing ( An oil communication groove formed in the inner side of the housing 110 along the longitudinal direction of the 110 is shown.

      On the other hand, the second region 112 of the housing 110 is configured such that oil in the first region 111 is restricted from moving toward the second region 112 through the first cam member 130. 3 and 5B, the inner surface of the second region 112 has a shape corresponding to the outer surface of the first cam member 130 (more specifically, the outer surface of the flange portion 135). Indicated. Then, when the first cam member 130 enters the second region 112, the oil may not move freely in the longitudinal direction of the housing 110 by the first cam member 130.

      Both ends of the housing 110 are open, and the second cam member 140 is coupled to an end portion of the both ends thereof toward the first region 111. The second cam member 140 covers the end of the housing 110, and extends into the housing 110 from the cover 141 and interacts with the first cam member 130. It has the cam part 143 in which the cam surface 142 was formed. The cover part 141 is fixed to the housing 110 and has a through hole 141a so that the door fastening part 121 of the shaft can pass therethrough. When the shaft 120 is inserted through the through hole 141a, a bush 101 and an O-ring 102 may be disposed between the outer surface of the shaft 120 and the inner surface of the cover 141. . Here, the O-ring 102 is to prevent the oil filled in the housing 110 from leaking.

      The first cam member 130 is installed to face the second cam member 140 and is inserted into the shaft 120 so as to rotate together with the shaft 120. To this end, the shaft 120 has a second flat portion 122, and the through hole 131 of the first cam member 130 through which the second flat portion 122 penetrates corresponds to the second flat portion 122. It is formed to have a plane (131a). In addition, the first cam member 130 is damped by the oil resistance when the cam friction surface 132 and the first cam member 130, which interacts with the cam surface 142 of the second cam member 140 rotates. Wing portion 134 having a surface 133 and a flange portion 135 for restricting movement of oil past the first cam member 130 when the first cam member 130 reaches a specific position. do.

      As shown in FIGS. 3 and 6, the cam surface 142 of the second cam member 140 is provided in a valley and mountain shape, and the first cam member 130 is rotated when the first cam member 130 rotates. While inducing the translational motion of the first cam member 130 by interacting with the cam friction surface 132, the door 20 can be stopped at the desired position in the freestop section.

     The cam surface 142 of the second cam member 140 is an opening guide surface formed to be inclined so that the first cam member 130 can move away from the second cam member 140 when the door 20 is rotated in the closing direction. 142a and the closing guide surface 142b formed in a circumferential direction at the point where the opening guide surface 142a ends. The opening guide surface 142a is related to the free stop operation of the door 20, and is related to the slow down operation of the door 20 when the closing guide surface 142b is formed. The opening guide surface 142a and the closing guide surface 142b are formed in the section. As it changes, the free stop section and the slow down section of the door 20 change. In FIG. 6, the free stop operation may be implemented in a section in which the opening angle of the door 20 is about 90 ° to 20 °, and a slow down operation in a section in which the opening angle of the door 20 is about 20 ° to 0 °. An example is shown so that this can be implemented.

      The rear cover 160 is coupled to the other end of the open housing 110, that is, the end of the second region 112. The rear cover 160 has an extension portion 161 extending a predetermined distance from the inner side of the inner side of the housing 110 to the inner side of the housing 110, the extension portion 161 is an insertion groove into which the distal end of the shaft 120 is inserted ( 162). An elastic member 150 is installed between the rear cover 160 and the first cam member 130 to elastically bias the first cam member 130 toward the second cam member 140.

      On the other hand, the outer surface of the housing 110, the cover portion 141 of the first cam member 130 and the rear cover 160 is fitted to the guide protrusion 31a (see Fig. 1) formed on the inner surface of the hinge case 31. The losing guide groove 110a is formed.

      Hereinafter, the operation of the hinge device having the above configuration will be described. Hereinafter, for convenience, the case where the door 20 is rotated in the closing direction will be described as an example. 7 is a cross-sectional view showing the operating state of the hinge device according to the position of the door in the reservoir according to the present invention. FIG. 7A shows when the door 20 is at any position in the freestop section, and FIG. 7B shows at the point where the operation of the door 20 diverges (the point from the freestop section to the slowdown section). 7C shows when the door 20 is in any position in the slow down period.

      4 illustrates a state in which the door 20 is completely opened, wherein the cam friction surface 132 of the first cam member 130 is positioned at the lowest point on the cam surface 142 of the second cam member 140. Located.

      As shown in FIG. 7A, when the door 20 rotates at an angle in the closing direction in the state of FIG. 4, the cam friction surface of the first cam member 130 is rotated while the first cam member 130 is rotated together with the shaft 120. 132 is guided by the opening guide surface 142a of the second cam member 140 so that the first cam member 130 moves a predetermined distance in the direction in which the elastic member 150 is compressed. As such, the oil in the housing 110 may be communicated through the oil communication groove 113 in the process of translation, so that the first cam member 130 does not receive much resistance from the oil. In addition, when the cam friction surface 132 of the first cam member is on the opening guide surface 142a of the second cam member 140 as shown in FIG. 7A, the first cam member 130 is moved by the elastic force of the elastic member 150. The force is applied in the direction of opening the door 20. Therefore, the door 20 stands in its place without falling by its own weight (free stop operation).

      As shown in FIG. 7B, when the door 20 is further rotated in the closing direction in the state of FIG. 7A, the first cam member 130 continues to move away from the second cam member 140 and the first cam member 130. ), The flange 135 enters the second region 112 where the oil communication groove 113 is not formed. (The cam friction surface 132 of the first cam member 130 is the second cam. To the upper end of the opening guide surface 142a of the member 140). Then, the movement of oil between the first region 111 and the second region 112 is limited by the flange portion 135 of the first cam member 130. In such a state, when the door 20 is to be rotated further in the direction of closing, the damping surface 133 of the first cam member 130 is resisted by the oil in the first region 111, so that the door 20 is momentarily. To stop (one stop motion).

      As shown in FIG. 7C, when the door 20 is further rotated in the closing direction in the state of FIG. 7B, the cam friction surface 132 of the first cam member 130 is closed of the second cam member 140. Since it rotates on the guide surface 142b (see FIG. 6), the elastic force of the elastic member 150 can no longer sustain the weight of the door 20. Therefore, the door 20 is continuously closed due to its own weight. During the closing operation, the damping surface 133 of the first cam member 130 receives rotational resistance by oil in the first region 111. The door 20 closes slowly (slow down operation).

      8 and 9 are an exploded perspective view and a cross-sectional view showing the configuration of the hinge unit according to the second embodiment in the hinge device according to the present invention. Compared with the embodiment of FIG. 3, the present embodiment has the same basic operation, but the first cam member performs only translational motion, and the second cam member is not fixed to the housing and is integrally formed on the shaft to rotate together with the shaft. There is a difference in that. The following describes only the features of the present embodiment.

      As shown in FIGS. 8 and 9, the hinge unit 200 includes a housing 210 filled with oil therein, a first cam member 220 and a second cam member translating in the housing 210. A shaft 240 in which the 230 is integrally formed, the elastic member 250 for pressing the first cam member 220 toward the second cam member 230, and the front cover 260 covering the open both ends of the housing, rear The cover 270 is configured.

      An oil communication passage 213 is provided in the first region 211 of the housing 210, and a front cover 260 is coupled to an end portion of the open end of the housing 210 toward the first region 211. The front cover 260 has a through hole 251 to pass through the door fastening portion 241 of the shaft coupled to the door 20. Unexplained symbols '201' and '202' are bushes and O-rings, respectively.

      The shaft 240 is integrally formed with the second cam member 230 which rotates together with the shaft 240 and induces a translational motion of the first cam member 220. At this time, the cam cam surface 231 interacting with the first cam member 220 and the damping surface 232 subjected to resistance by oil when the second cam member 230 rotates are formed on the second cam member 230. The wing portion 233 having a is provided.

      The first cam member 220 has a cam portion 223 formed with a cam surface 222 for interacting with the second cam member 230 and is installed to face the second cam member 230. At this time, the first cam member 220 is configured such that the movement of oil can be limited as one end thereof enters the second region (112). For example, FIG. 8 illustrates a case where the outer surface of the first cam member 220 corresponds to the inner surface of the second region 112.

      The rear cover 270 is coupled to an end portion of the housing 210 toward the second region 212, and an elastic member 250 is disposed between the rear cover 270 and the first cam member 220.

      In the present embodiment, the opening and closing operation of the door 20 differs only in that the second cam member 230 integrally formed on the shaft 240 implements a slow down operation (the first embodiment in the embodiment of FIG. 3). The damping surface of the cam member implements a slow down operation. Since it can be sufficiently predicted from the embodiment of FIG. 3, redundant description thereof will be omitted.

      As described above, the present invention has the effect of reducing component costs and improving product productivity by integrating and simplifying the configuration for free-stop operation and the configuration for slow-down operation in the hinge device.

Claims (15)

In the hinge device for rotatably connecting the reservoir body and the door, A first cam member installed inside the housing to permit translational movement with a housing filled with oil; and one end coupled to the door at an outside of the housing, and the other end of the shaft extending into the housing. And a second cam member installed to face the first cam member so as to induce a translational motion of the first cam member by interacting with the first cam member. An elastic member for urging toward the member; When the first cam member reaches a specific position inside the housing, the interior of the housing is divided into a first region and a second region in the longitudinal direction of the housing so that the oil in the first region is the first cam member. The hinge device, characterized in that for limiting communication to the second area through the.       The method of claim 1,       When the first cam member or the second cam member rotates while the first cam member restricts the movement of oil, resistance is generated by oil located in the first region, so that the door is closed slowly. Hinge device.       The method of claim 1,       The first region, the hinge device, characterized in that the oil communication passage is provided so that the oil can communicate in the longitudinal direction of the housing through the first cam member when the first cam member is moved. The method of claim 3, The oil communication passage is a hinge device, characterized in that at least one oil communication groove formed in the inner surface of the housing along the longitudinal direction of the housing. The method of claim 1, The first cam member is installed so as to rotate together with the shaft during the opening and closing operation of the door, the second cam member is a hinge, characterized in that fixed to the housing so as not to rotate with the first cam member Device. The method of claim 5, The first cam member has a wing portion having a cam friction surface interacting with the second cam member and a damping surface subjected to resistance by oil when the first cam member rotates, and the first cam member is characterized in that the first cam member And a flange portion for limiting movement of oil when the position is reached.       The method of claim 1,       The second cam member includes a cover portion covering one end portion of the housing, and a cam portion having a cam surface extending from the cover portion into the housing and interacting with the first cam member. Device.       The method of claim 1,       And the second cam member is integrally formed with the shaft to rotate together with the shaft during opening and closing of the door.       The method of claim 8,       And the second cam member has a wing having a cam friction surface interacting with the first cam member and a damping surface subjected to resistance by oil when the second cam member rotates.       The method of claim 8,       The first cam member has a cam portion formed with a cam surface for interacting with the second cam member, the hinge characterized in that the movement of the oil is restricted as one end of the first cam member enters the second area Device.       The hinge device includes a main body having an open upper portion, a door for opening and closing an open upper portion of the main body, and a hinge device for rotatably connecting the door to the main body.       A housing filled with oil; and one end coupled to the door at an outside of the housing, and the other end extending into the housing, the shaft being rotated when the door is opened and closed, and rotating together with the shaft. A first cam member installed to translate the inside of the housing; and a second cam member installed opposite to the first cam member to induce a translational motion of the first cam member; and the first cam member. And an elastic member for pressing the second cam member toward the second cam member.       And the first cam member has a damping surface subjected to resistance by oil when the first cam member rotates in a state where the movement of oil is restricted.       The method of claim 11,       And an inner space of the housing has an area in which an oil communication passage is provided so that oil can move past the first cam member as the first cam member translates.       The method of claim 12,       The first cam member further comprises a flange portion formed to limit movement of oil when one end of the region is reached.       The method of claim 12, The oil communication passage is at least one oil communication groove, characterized in that formed in the inner surface of the housing along the longitudinal direction of the housing.       A storage unit having a main body with an open upper portion, a door for opening and closing an open upper part of the main body, and a hinge device for rotatably connecting the door to the main body, wherein the hinge device is       A housing filled with oil; and one end of which is coupled to the door from the outside of the housing and the other end of which extends to the inside of the housing, wherein the shaft rotates when the door is opened and closed. A first cam member installed therein; and a second cam member rotating together with the shaft and inducing a translational motion of the first cam member; and an elastic member for pressing the first cam member toward the second cam member. Including;       The first cam member limits the movement of the oil at a specific position during the translational movement section, and the second cam member is damped to be resisted by the oil when rotated in a state where the movement of the oil is restricted by the first cam member. A reservoir having a face.

Images