Patent Description:
Generally, a glove box assembly for accommodating simple objects is provided in a vehicle. The glove box assembly is disposed in a dashboard in front of a passenger's seat.

A glove box assembly includes a glove box having a hollow shape for accommodating objects and an opening and closing apparatus attached to the glove box for opening or closing an inner space of the glove box. The opening and closing apparatus may include a push type opening and closing apparatus or a pull type opening and closing apparatus.

Among them, the opening and closing apparatus may include a push type or pull type knob pulled or pressed by a user, a plurality of rods moved by the movement of the knob, and a gear disposed between the plurality of rods to move the rods in different directions.

Conventional opening and closing apparatuses operate through a linear method in which a force transmitted by a knob is directly transmitted to a rod to move the rod. In the conventional opening and closing apparatuses, the loss of the force transmitted from a user is sought to be small, the number of components are sought to be minimized. <CIT> relates to a glove box opening and closing apparatus according to the preamble of claim <NUM>. <CIT> relates to a device for locking the glove box in a car.

In one general aspect, here is provided a glove box opening and closing apparatus. The apparatus includes a knob rotatably coupled to a glove box and configured to be disposed at one of a first position and a second position, wherein the knob includes a first housing coupled to the glove box, a knob body disposed in the first housing, and a rotating shaft which connects the first housing and the knob body and is a rotation center of the knob body, a rotator that rotates in conjunction with rotation of the knob, and rods that move in conjunction with the rotation of the rotator. The rotator includes a fixing block, a rotating unit body, wherein the rotator unit body is rotatably coupled to the fixing block, a link in contact with the knob, an interlocking surface is formed on the link, and a contact area of the interlocking surface change the more the knob moves from the first position to the second position.

The interlocking surface may be disposed inside a rotation path of the knob.

The knob body may include a pressing protrusion which protrudes from a part of the first housing in a direction from the first housing toward the rotator and of which an end portion is in contact with the interlocking surface.

The knob may include a second housing connected to the rotating shaft and coupled to the rotator through a coupling member, a fixing block of the rotator may be fixed to the second housing by the coupling member, and the link is disposed at one side of the rotary unit body in a longitudinal direction of the rotating shaft.

The pressing protrusion may maintain a state of not pressing the interlocking surface when the link is disposed at the first position and maintain a state of pressing the interlocking surface when the link is disposed at the second position, and the pressing protrusion may be rotatable between the first position and the second position.

The rotary unit body may have a rotation distance corresponding to a rotation distance of the pressing protrusion which rotates from the first position toward the second position.

The rod includes a protruding frame in contact with the rotary unit body. The rotary unit body is configured to move with the protruding frame pressed by the rotary unit body in response to the pressing protrusion moving from the first position toward the second position.

The interlocking surface may include a first region in which the pressing protrusion is disposed at the first position, and a second region in which the pressing protrusion is disposed at the second position.

The first region may include a <NUM>-<NUM> region in contact with the pressing protrusion disposed at the first position and a <NUM>-<NUM> region not in contact with the pressing protrusion disposed at the first position.

The second region may include a <NUM>-<NUM> region not in contact with the pressing protrusion disposed at the second position and a <NUM>-<NUM> region in contact with the pressing protrusion disposed at the second position.

The interlocking surface may have a shape inclined in a direction from the <NUM>-<NUM> region toward the <NUM>-<NUM> region.

In another general aspect, here is provided a glove box assembly that includes a glove box coupled to a dashboard of a vehicle, and a glove box opening and closing apparatus which is attached to the glove box and configured to open or close an inner portion of the glove box. The glove box opening and closing apparatus includes a knob rotatably coupled to a glove box and configured to be disposed at one of a first position and a second position, a rotator configured to rotate in conjunction with rotation of the knob, and at least one rod configured to move in conjunction with the rotation of the rotator. The rotator includes a link in contact with the knob. An interlocking surface is formed on the link, and a contact area of the interlocking surface change more the knob moves from the first position to the second position.

The knob includes a first housing coupled to the glove box, a knob body disposed in the first housing, and a rotating shaft which connects the first housing and the knob body and is a rotation center of the knob body, wherein the knob body may include a pressing protrusion which protrudes from a part of the first housing in a direction from the first housing toward the rotator and of which an end portion is in contact with the interlocking surface.

The knob may include a second housing connected to the rotating shaft and coupled to the rotator through a coupling member, the rotator may include a fixing block fixed to the second housing by the coupling member and a rotary unit body rotatably coupled to the fixing block, and the link may be disposed at one side of the rotary unit body in a longitudinal direction of the rotating shaft.

Advantages and features of the present disclosure and methods of achieving the advantages and features will be clear with reference to embodiments described in detail below together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed herein but will be implemented in various forms. The embodiments of the present disclosure are provided so that the present disclosure is completely disclosed, and a person with ordinary skill in the art can fully understand the scope of the present disclosure. The present disclosure will be defined only by the scope of the appended claims. Meanwhile, the terms used in the present specification are for explaining the embodiments, not for limiting the present disclosure.

In a description of the embodiment, in a case in which any one element is described as being formed on or under another element, such a description includes both a case in which the two elements are formed in direct contact with each other and a case in which the two elements are in indirect contact with each other with one or more other elements interposed between the two elements. In addition, when one element is described as being formed on or under another element, such a description may include a case in which the one element is formed at an upper side or a lower side with respect to another element.

Hereinafter, a glove box opening and closing apparatus and a glove box assembly including the same will be described in detail with reference to the accompanying drawings, components that are the same or correspond to each other will be denoted by the same or corresponding reference numerals regardless of symbols the accompanying drawings, and redundant descriptions may be omitted.

<FIG> is a perspective view illustrating a glove box assembly according to one embodiment of the present invention, and <FIG> is a perspective view illustrating a glove box opening and closing apparatus. <FIG> is an enlarged view illustrating a part of the glove box opening and closing apparatus, and <FIG> is a view illustrating the glove box opening and closing apparatus of <FIG> from which a first housing and a second housing are removed. <FIG> is a front view illustrating a link, and <FIG> is a cross-sectional view along line A-A of <FIG>. <FIG> is a side view illustrating a state of a pressing protrusion in contact with the link, <FIG> is a plan view illustrating the state of the pressing protrusion in contact with the link, and <FIG> is a view illustrating a state of the pressing protrusion disposed at a second position.

Referring to <FIG>, a glove box assembly <NUM> according to the present invention includes a knob <NUM> rotatably coupled to a glove box <NUM> and disposed at any one of a first position P1 or second position P2, a rotary unit <NUM> (for example, a rotator) which rotates in conjunction with the rotation of the knob <NUM>, and at least one rod <NUM> which moves in conjunction with the rotation of the rotary unit <NUM>, the rotary unit <NUM> includes a link <NUM> in contact with the knob <NUM>, and an interlocking surface <NUM> is formed on the link <NUM> so that, as the knob <NUM> moves from the first position P1 to the second position P2, the knob <NUM> may come into contact with a different portion (or area) of the interlocking surface <NUM> (for example, the contact area of the interlocking surface <NUM> and the knob <NUM> may change).

The glove box <NUM> may be configured using a combination of a storage part <NUM> having a hollow shape and a front panel part <NUM> which covers one side of the storage part <NUM> and of which an outer surface is exposed to face a passenger's seat in a vehicle. A groove part is provided in the front panel part <NUM>, and a part of an opening and closing apparatus <NUM> may be accommodated in the groove part. The groove part may be disposed at an upper side of the front panel part <NUM>.

The opening and closing apparatus <NUM> includes the knob <NUM>, the rotary unit <NUM>, a first rod <NUM>, a second rod <NUM>, and a gear unit <NUM>.

The knob <NUM> is rotatably disposed on the glove box <NUM>. More specifically, the knob <NUM> may be disposed in the groove part of the front panel part <NUM> of the glove box <NUM>. The knob <NUM> may be disposed in the glove box <NUM> while disposed in the groove part.

The knob <NUM> includes a first housing <NUM>, a knob body <NUM>, a second housing <NUM>, and a rotating shaft <NUM>.

The first housing <NUM> is coupled to the glove box <NUM>. More specifically, the first housing <NUM> may be disposed in the groove part of the glove box <NUM>. The first housing <NUM> may be formed in a hollow shape for accommodating the knob body <NUM>.

The knob body <NUM> is disposed in the first housing <NUM>. An outer surface of the knob body <NUM> may be exposed to face a passenger's room in a state in which the knob body <NUM> is disposed in the first housing <NUM>. The knob body <NUM> is connected to the rotating shaft <NUM>. The knob body <NUM> may be pulled by a user. When the knob body <NUM> is pulled by the user, the knob body <NUM> rotates about the rotating shaft <NUM>. Accommodation holes for accommodating the rotating shaft <NUM> may be formed in the knob body <NUM> and one side and the other side of the first housing <NUM>.

The knob body <NUM> may include a pressing protrusion 214a.

The pressing protrusion 214a may protrude from one portion of the first housing <NUM> in a direction from the first housing <NUM> toward the rotary unit <NUM>. The pressing protrusion 214a may be formed in a rectangular shape. An end portion of the pressing protrusion 214a may come into contact with the interlocking surface <NUM>.

In a state in which the pressing protrusion 214a is in contact with the interlocking surface <NUM>, the pressing protrusion 214a may be disposed at the first position P1 in a state while not rotating with the knob body <NUM> and pressing the interlocking surface <NUM> and at the second position P2 at which the pressing protrusion 214a rotates with the knob body <NUM> and presses the interlocking surface <NUM>. The pressing protrusion 214a may rotate about the rotating shaft <NUM> between the first position P1 and the second position P2. As the pressing protrusion 214a rotates to move from the first position P1 to the second position P2, the link <NUM> of the rotary unit <NUM> may move in conjunction of the pressing protrusion 214a.

A clip C may be disposed on the pressing protrusion 214a. The clip C may be disposed on an end portion of the pressing protrusion 214a. The clip C may be formed of a material different from a material of the link <NUM>. For example, the clip C may be formed of a steel material. The clip C is a component in direct contact with the interlocking surface <NUM> while coupled to the pressing protrusion 214a. Accordingly, the clip C can prevent a phenomenon in which an excessive frictional force is generated on the interlocking surface <NUM> to prevent damage to the interlocking surface <NUM> so as to maintain a lifetime of the interlocking surface <NUM>.

As illustrated in <FIG>, a first return spring S1 may be disposed in the knob body <NUM>. When the user pulls and releases the knob body <NUM>, the knob body <NUM> may return to a position before the user pulls the knob body <NUM> by the first return spring S1.

The second housing <NUM> may be connected to the rotating shaft <NUM> and coupled to the rotary unit <NUM> through coupling members F such as a bolt or screw. In this case, a protruding portion 216a for accommodating the coupling members F may be formed on the second housing <NUM>. The protruding portion 216a may be formed in a hollow cylindrical shape. In addition, the second housing <NUM> may be fixedly coupled to the front panel part <NUM> of the glove box <NUM> through the coupling members F.

The rotating shaft <NUM> is connect the first housing <NUM> and the knob body <NUM> and is a rotation center of the knob body <NUM>. The rotating shaft <NUM> may be disposed in a longitudinal direction of the knob body <NUM>. The rotating shaft <NUM> may be accommodated in the accommodation holes provided at the first housing <NUM> and one side and the other side of knob body <NUM> and may be supported by the first housing <NUM> and the knob body <NUM>.

The rotary unit <NUM> includes a fixing block <NUM>, a rotary unit body <NUM>, and the link <NUM>.

As illustrated in <FIG>, the fixing block <NUM> may be configured using a combination of a plate part 222a having a circular shape and a block part 222b having a hollow cylindrical shape. A size of an inner circumference surface of the block part 222b of the fixing block <NUM> may correspond to a size of an outer circumference surface of the protruding portion 216a of the second housing <NUM>. The fixing block <NUM> in a state in which the fixing block <NUM> is fixed to the protruding portion 216a may be fixed to the second housing <NUM> through the coupling members F.

The rotary unit body <NUM> is rotatably coupled to the fixing block <NUM>. More specifically, the rotary unit body <NUM> includes a rotating part 224a and a pushing part 224b.

The rotating part 224a may be rotatably coupled to the fixing block <NUM>. As illustrated in <FIG>, a shape of the rotating part 224a may be a hollow cylindrical shape. An inner portion of the rotating part 224a may have a shape for accommodating the plate part 222a and the block part 222b of the fixing block <NUM>.

An inner circumference surface of the rotating part 224a for accommodating the block part 222b may have a shape corresponding to a shape of an outer circumference surface of the block part 222b of the fixing block <NUM>. Accordingly, a rotation center of the fixing block may be the same as a rotation center of the rotary unit body <NUM> including the rotating part 224a. Accordingly, when the pressing protrusion 214a of the second housing <NUM> rotates about the rotating shaft <NUM> to press the link <NUM>, the rotating part 224a of the rotary unit body <NUM> may rotate about the rotation center of the fixing block <NUM>.

The pushing part 224b may be disposed at one side (for example, a lower side) of the rotating part 224a. The pushing part 224b may rotate with the rotating part 224a. The pushing part 224b may be in contact with the rod. When the pressing protrusion 214a presses the link <NUM> to rotate the rotating part 224a, the pushing part 224b may press the first rod <NUM> while rotating with the rotating part 224a. The first rod <NUM> pressed by the pushing part 224b may move forward or rearward in a longitudinal direction. Accordingly, the pushing part 224b may be regarded as a component for converting a rotational force into a linear force.

The link <NUM> may be disposed at one side of the rotating part 224a. More specifically, the link <NUM> may be disposed at one side of the rotating part 224a in a longitudinal direction of the rotating shaft <NUM> of the knob <NUM> from the rotating part 224a.

The link <NUM> includes the interlocking surface <NUM>.

The interlocking surface <NUM> may be disposed inside a rotation path R of the knob <NUM>. More specifically, when the pressing protrusion 214a, which rotates about the rotating shaft <NUM>, rotates from the first position P1 to the second position P2, the interlocking surface <NUM> may be disposed at a position at which the interlocking surface <NUM> overlaps a part of the pressing protrusion 214a. Accordingly, when the pressing protrusion 214a rotates about the rotating shaft <NUM>, the pressing protrusion 214a may press the interlocking surface <NUM>, a pressing force of the pressing protrusion 214a may be constantly maintained due to the position of the interlocking surface <NUM>.

A rotation distance of the interlocking surface <NUM> may correspond to a rotation distance of the pressing protrusion 214a which rotates from the first position P1 toward the second position P2.

More specifically, in a state in which the pressing protrusion 214a is in contact with the interlocking surface <NUM>, when the pressing protrusion 214a moves (rotates) from the first position P1 to the second position P2, since the state in which the pressing protrusion 214a is in contact with the interlocking surface <NUM> is maintained without being released, a pressing force transmitted through the pressing protrusion 214a may be entirely transmitted to the rotary unit body <NUM> through the interlocking surface <NUM>. Accordingly, the pressing force of the pressing protrusion 214a may be entirely converted into a rotational force of the rotary unit body <NUM>. When the pressing protrusion 214a rotates, since the interlocking surface <NUM> moves according to the movement of the pressing protrusion 214a, the rotary unit body <NUM> which receives a force through the interlocking surface <NUM> may rotate about the rotation center of the fixing block <NUM> by a distance as much as the rotation of the pressing protrusion 214a. The operation may mean that a force generated by the rotation of the knob <NUM> can be stably transmitted to the rod through the rotary unit <NUM>.

The interlocking surface <NUM> may include a first region 227a, a second region 227b, and a third region.

The first region 227a may be a region in which the pressing protrusion 214a is disposed at the first position P1. The first region 227a may include a <NUM>-<NUM> region 227a-<NUM> and a <NUM>-<NUM> region 227a-<NUM>.

As illustrated in <FIG>, the <NUM>-<NUM> region 227a-<NUM> may be a portion in contact with the pressing protrusion 214a disposed at the first position P1. The <NUM>-<NUM> region 227a-<NUM> may be a portion not in contact with the pressing protrusion 214a disposed at the first position P1. Accordingly, the first region 227a may have a shape inclined downward from the <NUM>-<NUM> region 227a-<NUM> toward the <NUM>-<NUM> region 227a-<NUM> in a direction from the rotary unit body <NUM> toward the link <NUM>.

The second region 227b may be a region at which the pressing protrusion 214a is disposed at the second position P2. The second region 227b may include a <NUM>-<NUM> region 227b-<NUM> and a <NUM>-<NUM> region 227b-<NUM>.

As illustrated in <FIG>, the <NUM>-<NUM> region 227b-<NUM> may be a portion not in contact with the pressing protrusion 214a disposed at the second position P2. The <NUM>-<NUM> region 227b-<NUM> may be a portion in contact with the pressing protrusion 214a disposed at the second position P2. Accordingly, the second region 227b may have a shape inclined downward from the <NUM>-<NUM> region 227b-<NUM> toward <NUM>-<NUM> region 227b-<NUM> in the direction from the rotary unit body <NUM> toward the link <NUM>.

The third region may be disposed between the first region 227a and the second region 227b. The third region may be a central portion between the first region 227a and a position to which the pressing protrusion 214a moves toward the second region 227b. Accordingly, the pressing protrusion 214a may be in contact with an entire portion of the third region not only in contact with the <NUM>-<NUM> region 227a-<NUM> at the first position P1 or the <NUM>-<NUM> region 227b-<NUM> at the second position P2. However, the present invention is not limited thereto. The pressing protrusion 214a in contact with the third region may be in contact with only a right region in the third region at a portion close to the first region 227a or left region in the third region at a portion close to the second region 227b.

As illustrated in <FIG>, The interlocking surface <NUM> may have a shape inclined upward in a direction from the first region 227a toward the second region 227b based on a direction from the pushing part 224b toward the rotating part 224a.

The interlocking surface <NUM> having the shape of the first region 227a and the shape of the second region 227b may have a shape inclined in a direction from the <NUM>-<NUM> region 227a-<NUM> toward the <NUM>-<NUM> region 227b-<NUM>. That is, the interlocking surface <NUM> may have a triple inclined structure in which two regions have the inclined shapes and has the shape inclined upward from the first region 227a toward the second region 227b and the shapes inclined toward the intersecting individual regions at the same time.

Accordingly, when the pressing protrusion 214a disposed at the first position P1 to be in contact with the <NUM>-<NUM> region 227a-<NUM> moves to be disposed at the second position P2, a torsional force may be generated on the interlocking surface <NUM> through the pressing protrusion 214a. In addition, when the pressing protrusion 214a rotates about the rotating shaft <NUM>, a position of the link <NUM> may be changed by the torsional force in a direction from the rotating part 224a toward the pushing part 224b.

Accordingly, the rotary unit body <NUM> is rotated about the rotation center of the fixing block <NUM> by the torsional force transmitted to the link <NUM>.

In the glove box assembly <NUM> according to one embodiment of the present invention, the torsional force is generated due to a structure of the pressing protrusion 214a and the interlocking surface <NUM>, and the glove box assembly <NUM> may have a structure in which the pressing protrusion 214a is continuously in contact with the interlocking surface <NUM> when the pressing protrusion 214a rotates. Accordingly, since a rotation distance of the rotary unit <NUM> may be finely adjusted according to a degree that the user manipulates the knob <NUM>, the present invention can have an effect that the user can open or close the glove box <NUM> even with a small force.

The link <NUM> may include a plurality of grooves <NUM>. The plurality of grooves <NUM> may be disposed in the interlocking surface <NUM> of the link <NUM>. The plurality of grooves <NUM> may be disposed apart from each other in the interlocking surface <NUM> and may have a concave shape inward from the link <NUM>. The plurality of grooves <NUM> are portions for reducing a contact area of the pressing protrusion 214a, and the generation of an excessive frictional force can be prevented by the plurality of grooves <NUM> when the pressing protrusion 214a presses the interlocking surface <NUM>. Accordingly, damage to the pressing protrusion 214a or the interlocking surface <NUM> can be prevented due to the plurality of groove <NUM>.

The first rod <NUM> may be disposed under the rotary unit <NUM> based on a direction from the knob <NUM> toward the rotary unit <NUM>. The first rod <NUM> may be connected to the rotary unit <NUM> and the gear unit <NUM>. The first rod <NUM> may receive a rotational force generated by the rotary unit <NUM> to move. The first rod <NUM> may be disposed in the longitudinal direction of the knob body <NUM>.

The first rod <NUM> includes a protruding frame <NUM>. The protruding frame <NUM> may have a shape protruding from a part of the first rod <NUM>. The protruding frame <NUM> may be provided to have a height sufficient such that, when the pushing part 224b rotates with the rotating part 224a, the pushing part 224b is not separated from the protruding frame <NUM> and a state in which the pushing part 224b is in contact with the protruding frame <NUM> is not released. For example, a height of the protruding frame <NUM> may correspond to a height of the first rod <NUM>.

The protruding frame <NUM> is in contact with an end portion of the pushing part 224b of the rotary unit body <NUM>. The protruding frame <NUM> may have a width corresponding to a thickness of the end portion of the pushing part 224b for stable contact with the end portion of the pushing part 224b.

As the pressing protrusion 214a moves from the first position P1 toward the second position P2, the first rod <NUM> may move with the protruding frame <NUM> pressed by the pushing part 224b of the rotary unit body <NUM>. More specifically, in a state in which the pushing part 224b is in contact with the protruding frame <NUM>, when the pressing protrusion 214a rotates, the pushing part 224b may rotate with the rotating part 224a. In this case, a rotational force may be generated by the rotating part 224a which rotates about the rotation center of the fixing block <NUM>, and the rotational force may be transmitted to the protruding frame <NUM>. The rotational force transmitted to the protruding frame <NUM> is converted into a pressing force pressing the protruding frame <NUM> in a direction from the first rod <NUM> toward the second rod <NUM>, and the pushing part 224b pushes the protruding frame <NUM>. When the protruding frame <NUM> is pushed, the first rod <NUM> in a state of being engaged with a gear of the gear unit <NUM> also moves. A stopper ST may be disposed on the first rod <NUM>. The stopper ST may be a component which stops forward movement of the protruding frame <NUM> and can prevent excessive forward movement of the rotary unit <NUM> and the knob <NUM>. Accordingly, lifetimes of the knob <NUM>, the rotary unit <NUM>, and the first rod <NUM> can increase due to the stopper ST.

The assembly for the glove box <NUM> according to one embodiment of the present invention may have a structure in which a force generated by the rotation of the knob <NUM> is stably transmitted to the first rod <NUM> through the rotary unit <NUM> and loss of the force generated by the knob <NUM> is minimized. Accordingly, since the first rod <NUM> moves in proportion to a degree of a force of the knob <NUM> applied by the user, even when the user manipulates the knob <NUM> with a small force, the first rod <NUM> can move, and thus user's ease of manipulation can be improved.

The second rod <NUM> may be disposed apart from the first rod <NUM> around the gear of the gear unit <NUM>. The second rod <NUM> may be engaged with the gear of the gear unit <NUM>. When the knob <NUM> rotates, and the first rod <NUM> is moved by the rotary unit <NUM>, the second rod <NUM> may move in a direction opposite to a direction in which the first rod <NUM> is moved by the gear unit <NUM> to open the storage part <NUM> of the glove box <NUM>.

As illustrated in <FIG>, a second return spring S2 may be disposed on the second rod <NUM>. When the user pulls and releases the knob body <NUM>, the second return spring S2 may return the first rod <NUM> to a position before the first rod <NUM> moves.

The gear unit <NUM> may be disposed in a region in which an end portion of the first rod <NUM> and an end portion of the second rod <NUM> overlap. The gear unit <NUM> may include the gear engaged with the first rod <NUM> and the second rod <NUM>, a body which rotatably supports the gear, and a guide member which is provided on the body and guides the movement of the first rod <NUM> and the second rod <NUM> in a straight direction.

According to one embodiment, since an opening and closing apparatus is disposed at a position at which a user's hand is easy to access, in addition to a person seated on a passenger's seat, a person seated on a driver's seat can easily open or close a glove box, and thus ease of use of a glove box assembly can be improved.

In addition, since a force applied to the user's hand is small, user's convenience can be improved.

The present disclosure has been made in an effort to solve problems in the related art, and the present disclosure is directed to a design of a glove box opening and closing apparatus having a shape and an operational structure in consideration of an increase in the number of components and an increase in cost.

Various embodiments of the present disclosure do not list all available combinations but are for describing a representative aspect of the present disclosure, and descriptions of various embodiments may be applied independently or may be applied through a combination of two or more.

Claim 1:
A glove box opening and closing apparatus comprising:
a knob (<NUM>) rotatably coupled to a glove box (<NUM>) and configured to be disposed at one of a first position (P1) and a second position (P2), wherein the knob (<NUM>) includes:
a first housing (<NUM>) coupled to the glove box (<NUM>);
a knob body (<NUM>) disposed in the first housing (<NUM>); and
a rotating shaft (<NUM>) which connects the first housing (<NUM>) and the knob body (<NUM>) and is a rotation center of the knob body (<NUM>), wherein the knob body (<NUM>) is configured to rotate about the rotating shaft (<NUM>);
a rotator (<NUM>) configured to rotate in conjunction with rotation of the knob (<NUM>); and
at least one rod (<NUM>) configured to move in conjunction with the rotation of the rotator (<NUM>), wherein the rod (<NUM>) includes a protruding frame (<NUM>),
wherein the rotator (<NUM>) includes:
a fixing block (<NUM>);
a rotary unit body (<NUM>), wherein the rotator unit body (<NUM>) is rotatably coupled to the fixing block (<NUM>), wherein the rotary unit body (<NUM>) includes a rotating part (224a) and a pushing part (224b), and wherein the rotary unit body (<NUM>) is configured to rotate about the rotation center of the fixing block (<NUM>);
a link (<NUM>) in contact with the knob (<NUM>), wherein the protruding frame (<NUM>) is in contact with an end portion of the pushing part (224b) of the rotary unit body (<NUM>), characterized in that
an interlocking surface (<NUM>) is formed on the link (<NUM>), and
a contact area of the interlocking surface (<NUM>) change the more the knob (<NUM>) moves from the first position (P1) to the second position (P2).