Dishwashing Machine

Abstract

The present invention provides a dishwasher. The dishwasher (1) comprises: a housing (2) having an opening for placing and taking out objects to be washed; a washing chamber arranged in the housing (2); a door (3) for opening and closing the opening; and a first latch (20) and a second latch (30) which are locking parts for maintaining the closed state of the door (3). Moreover, when the closed state of the door (3) achieved by the first latch (20) and the second latch (30) is released, the door (3) performs an opening action under the action of its own weight. Thus, a dishwasher is provided which can easily and reliably perform an opening action of the door (3) with a simple structure.

Description

Technical Field

[0001] The present invention relates to a tableware washing machine for washing tableware and the like. Background Art

[0002] In the past, for example, Japanese Patent Publication No. 2002-315712 (hereinafter referred to as "Patent Document 1") disclosed a dishwasher having the structure shown below. The dishwasher described in Patent Document 1 includes: a linkage mechanism that links the opening and closing actions of the second door with the first door so that the second door is opened and closed; and a resistance applying unit that applies resistance to the opening and closing actions of the second door to slow down its opening and closing speed. For the above-mentioned dishwasher, when the user releases the engagement of the hook and opens the first door with the hand holding the handle, the downward pull of the connecting plate of the linkage mechanism on the wire is released. And, by releasing the pulling of the wire on the rod, the second door is opened under the action of the force of the torsion coil spring. That is, the first door and the second door of the dishwasher of Patent Document 1 are opened under the action of the force of the torsion coil spring.

[0003] However, in the above-mentioned dishwasher using an elastic body to open the door, the structure for opening the door is relatively complicated, and the number of parts is large. In addition, the elastic body tends to exert uneven force, so the opening action of the first door and the second door is unstable. Summary of the invention

[0004] The present invention provides a dishwasher capable of easily and reliably performing a door opening action with a simple structure.

[0005] The dishwasher of the present invention comprises: a housing having an opening for taking out and placing objects to be washed; a washing chamber provided in the housing; a door for opening and closing the opening; and a locking portion for maintaining the door in a closed state. The structure is such that when the closed state of the door realized by the locking portion is released, the door opens under the action of its own weight.

[0006] With this structure, when the door is released from the closed state by the locking part, the door opens under the action of its own weight. Therefore, it is not necessary to provide other opening mechanisms such as elastic bodies and drivers. Thus, it is possible to provide a dishwasher that can easily and reliably perform the door opening action with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a perspective view showing a dishwasher according to an embodiment of the present invention.

[0008] Figure 2 It is a perspective view of the dishwasher with the door in an open state.

[0009] Figure 3It is an internal side view of the above-mentioned dishwasher when the door is in a closed state.

[0010] Figure 4 yes Figure 3 An enlarged view of the main parts of a dishwasher is shown.

[0011] Figure 5 It's the door from Figure 3 Internal side view showing the closed position with the display slightly turned towards the open position.

[0012] Figure 6 yes Figure 5 An enlarged view of the main parts of a dishwasher is shown.

[0013] Figure 7 It's the door from Figure 5 The state shown is an internal side view when it is further rotated in the opening direction.

[0014] Figure 8 yes Figure 7 An enlarged view of the main parts of a dishwasher is shown.

[0015] Fig. 9 It's the door from Figure 7 The state shown is an internal side view when it is further rotated in the opening direction.

[0016] Fig.10 yes Fig. 9 An enlarged view of the main parts of a dishwasher is shown.

[0017] Fig.11 It's the door from Fig. 9 The state shown is an internal side view when it is further rotated in the opening direction.

[0018] Fig.12 yes Fig.11 An enlarged view of the main parts of a dishwasher is shown.

[0019] Fig.13 It's the door from Fig.11 The state shown is an internal side view when it is further rotated in the opening direction.

[0020] Fig.14 yes Fig.13 An enlarged view of the main parts of a dishwasher is shown.

[0021] Fig.15 It's the door from Fig.13 The state shown is an internal side view when the container is further rotated in the opening direction to become an open state.

[0022] Fig.16 yes Fig.15 An enlarged view of the main parts of a dishwasher is shown.

[0023] Fig.17 It is an exploded perspective view of the mounting member and the speed reduction side link member of the above-mentioned dishwasher.

[0024] Fig.18 Observed from below Fig.17 A three-dimensional view of the deceleration side link component.

[0025] Fig.19 It is a perspective view of the second door of the above-mentioned dishwasher.

[0026] Fig. 20 It is a rear view of the second door of the above-mentioned dishwasher.

[0027] Fig.21 is from Fig. 20 The perspective view of the second door with the inner shell removed is shown.

[0028] Fig. 22 yes Fig.21 Exploded three-dimensional diagram.

[0029] Fig.23 yes Fig.21 Enlarged view of the main part.

[0030] Fig.24 yes Fig.23 Stereoscopic diagram.

[0031] Fig.25 is from Fig. 20 The second door is shown in a top view with the outer shell removed.

[0032] Fig.26 It is an enlarged perspective view of the main parts of the dishwasher when the lock release button is not pressed.

[0033] Fig. 27 It is an enlarged perspective view of the main parts when the lock release button of the dishwasher is pressed.

[0034] Fig.28 It is a figure which shows the electric drive and latch member of the said dishwasher.

[0035] Fig.29 It is a perspective view for explaining the engagement relationship between the electric driver and the latch member of the above-mentioned dishwasher.

[0036] Fig.30 It is a perspective view for explaining the engagement relationship between the electric driver and the latch member of the above-mentioned dishwasher. DETAILED DESCRIPTION

[0037] Hereinafter, a dishwasher according to an example of an embodiment of the present invention will be described in detail with reference to the drawings.

[0038] 〔Dishwashing machine〕

[0039] Below, refer to Figure 1 and Figure 2 A schematic structure of dishwasher 1 according to an embodiment of the present invention will be described.

[0040] Figure 1 This is a perspective view of dishwasher 1 according to the embodiment of the present invention when door 3 is in a closed state. Figure 2 This is a perspective view of dishwasher 1 when door 3 is in an open state.

[0041] In addition, in this embodiment, as shown in the figure, the door 3 side is the front direction, and the side opposite to the door 3 is the rear direction. In addition, in the following description, the side where the dishwasher is installed is the bottom, and the opposite side is the top. Furthermore, the right side facing the front of the door 3 is the right direction, and the left side is the left direction.

[0042] like Figure 1 and Figure 2 As shown, the dishwasher 1 of this embodiment has a housing 2. The housing 2 includes an outer housing 4 constituting an outer shell and an inner housing 5 disposed inside the outer housing 4. The inner housing 5 includes a washing chamber 6 disposed inside. The housing 2 has an opening 9 formed at the front thereof. Washed objects 8 such as tableware placed in a tableware basket 7 are taken in and out through the opening 9 of the housing 2.

[0043] The washing chamber 6 is provided with a washing nozzle (not shown), a washing pump (not shown), etc. The washing nozzle sprays washing water to the objects 8 placed in the cutlery basket 7 to wash the objects 8. The washing pump is arranged at the lower outer side of the washing chamber 6. The washing pump draws washing water from a water reservoir (not shown) provided at the inner bottom of the washing chamber 6 and supplies it to the washing nozzle.

[0044] Furthermore, the washing chamber 6 is provided with an air supply device (not shown) disposed outside. Thus, the dishwashing machine 1 has a drying function. That is, when drying after washing and rinsing the washed object 8, the air supply device inhales air and sends the air from the lower part of the washing chamber 6 to the inside of the washing chamber 6 via a duct. Specifically, when drying, the air in the washing chamber 6 is heated by a heater (not shown). Then, the air that has become warm air by heating is sent to the inside of the washing chamber 6 by the air supply device to dry the washed object 8. In addition, during washing and rinsing, the heater heats the washing water in the washing chamber 6 to make it warm water. Then, warm water is sprayed from the washing nozzle to wash the washed object 8. Thus, the washed object 8 can be efficiently washed.

[0045] The opening 9 of the housing 2 is opened and closed by the door 3. The door 3 has a seal (not shown) that can seal the opening 9 in a liquid-tight manner.

[0046] The door 3 of this embodiment includes a first door 3a located at the upper side when closed and a second door 3b located at the lower side when closed. The door 3 is configured to be reversibly opened and closed by an opening and closing mechanism described later.

[0047] The first door 3a is supported by the first support member 12 with a first support shaft 45 (for example, see Figure 3 ) is the center of rotation and the shaft is supported so as to be able to rotate freely. Figure 1 The door 3 shown in the figure is arranged in a substantially upright (including upright) position in the closed state. Figure 2 The door 3 shown is arranged in a substantially horizontal (including horizontal) position in the open state.

[0048] Similarly, the second door 3b is supported by the second support member 17 with a second support shaft 47 (for example, see Fig. 9 ) is the rotation center and the shaft support is rotatable. The second door 3b is Figure 1 The door 3 shown in the figure is arranged in a substantially upright (including upright) position in the closed state. Figure 2 The door 3 shown in FIG. 1 is arranged in a substantially horizontal (including horizontal) position in the open state. Figure 2 In the shown open state of the door 3 being fully opened, the first door 3a is arranged at a substantially horizontal (including horizontal) position on the lower side of the housing 2 so as to substantially overlap (including overlap) the upper side of the second door 3b.

[0049] In addition, if Figure 1 and the following Fig.25 As shown, a lock release button 41 for manually unlocking the door 3 is respectively arranged on one side and the other side of the left and right side portions of the second door 3b. Thus, the second door 3b has a neat and beautiful design in the front. In addition, in this embodiment, the left side of the second door 3b is referred to as one side, and the right side of the second door 3b is referred to as the other side. The same applies to the following.

[0050] like Figure 1 and the following Fig.19 As shown in FIG. 1 , the second door 3b includes an operation panel, exemplified as a capacitive touch panel 37, mounted on the front thereof. The user is configured to touch a predetermined portion of the touch panel 37 to enable the door 3 to be opened by an electric driver 33, which is exemplified as a driver, as described later. The touch panel 37 is configured to enable the user to input instructions through the operation panel, thereby enabling the user to set operation operations such as a washing process and a drying time of the dishwasher, for example.

[0051] [Door opening and closing mechanism and opening and closing action]

[0052] Below, refer to Figure 3 to Figure 16 The opening and closing mechanism and the opening and closing operation of door 3 of dishwasher 1 will be described.

[0053] Figure 3 to Figure 16 It is an internal side view and an enlarged view of a main part showing a state when the door 3 is rotated from a closed state to an open state via an open state.

[0054] In addition, hereinafter, the state in which the door 3 is slightly opened due to its own weight will be described as an "open state", and the state in which the door 3 is fully opened substantially horizontally (including horizontally) due to its own weight will be described as an "open state".

[0055] like Figure 3 to Figure 16 As shown, the opening and closing mechanism of the door 3 is provided on, for example, one side of the left and right sides of the box body 2. The opening and closing mechanism includes a deceleration side link member 13 as a link member, a deceleration member such as a rotary damper 14. In addition, an opening and closing mechanism of the door 3 that does not include the above-mentioned deceleration member and is only related to the opening and closing of the door 3 is provided on, for example, the other side of the left and right sides of the box body 2.

[0056] In addition, in the above description, the structure in which the deceleration member is disposed on the side portion of one side of the second door 3b is described as an example, but it is not limited thereto. The deceleration member may also be disposed on the side portion of the other side of the second door 3b, for example, or on both the side portion of one side and the side portion of the other side.

[0057] First, refer to Figure 3 and Figure 4 The opening and closing mechanism and the opening and closing operation when door 3 of dishwasher 1 is in the closed state will be described. Figure 3 The diagram shows the closed state of the first door 3a and the second door 3b of the door 3. Figure 4 yes Figure 3 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged.

[0058] like Figure 3 As shown, the first door 3a is rotatably supported by the first supporting member 12 with the first supporting shaft 45 as the rotation center. The first supporting shaft 45 is mounted on the side portion of the inner side of the inner box 5 of the box body 2. In addition, the first supporting shaft 45 constitutes a rotation reference axis that serves as a reference for the rotational movement of the door 3, namely the first door 3a and the second door 3b.

[0059] The first door 3a includes a first latch 20 that functions as a locking portion, for example, in a hook shape. Similarly, the second door 3b includes a second latch 30 that functions as a locking portion, for example, in a hook shape.

[0060] In addition, as described above, the second door 3b is supported by the second supporting member 17 (see Fig. 9 etc.) with the second support shaft 47 (refer to Fig. 9 The supporting side link member 11 as a link member is formed, for example, by being bent into a shape that is roughly L-shaped (including L-shaped). The supporting side link member 11 has a lower end 11b on the second door 3b side and an upper end 11a on the deceleration side link member 13 side. The second supporting member 17 is connected to the supporting side link member 11 by means of a second supporting shaft 47 arranged at the lower end 11b. The supporting side link member 11 is supported by the link shaft 46 as the rotation center so as to be rotatable. The link shaft 46 is rotatably mounted relative to the first supporting member 12 at the end on the side opposite to the side where the first door 3a connected to the first supporting member 12 is located. The supporting side link member 11 has a guide pin 15 protruding from its upper end 11a.

[0061] like Figure 4 As shown, the deceleration side link member 13 is arranged above the support side link member 11. The deceleration side link member 13 is pivotally supported to be rotatable about an arm shaft 48. The arm shaft 48 is rotatably mounted to a mounting member 18 mounted on the inner side of the inner case 5.

[0062] The speed reduction link member 13 includes a substantially disk-shaped link base 13a and a rod 13b. The rod 13b extends from the link base 13a toward the support link member 11. The link base 13a includes a link gear 13d formed partially on its outer periphery.

[0063] The rod portion 13b is formed with a slit 16. The slit 16 includes a non-deceleration slit 16a, a switching point 16b, a deceleration slit 16c, etc., which are formed in order from the support-side link member 11 side to the link base 13a side.

[0064] The guide pin 15 of the support-side link member 11 is inserted into the slit 16 of the deceleration-side link member 13. The guide pin 15 is guided by the slit 16 into which it is inserted, and moves along the slit 16 in accordance with the rotation of the support-side link member 11.

[0065] The non-decelerating slit 16a is formed in substantially the same shape (direction) as the locus of the guide pin 15 as the support-side link member 11 rotates. Therefore, even if the guide pin 15 moves along the non-decelerating slit 16a, the decelerating-side link member 13 does not rotate substantially.

[0066] On the other hand, the deceleration slit 16c is formed in a shape (direction) different from the trajectory of the guide pin 15 moving along the rotation of the support-side link member 11. Therefore, when the guide pin 15 moves along the deceleration slit 16c, the deceleration-side link member 13 rotates in accordance with the rotation trajectory of the support-side link member 11.

[0067] The transition point 16b is a boundary portion between the non-deceleration slit 16a and the deceleration slit 16c. That is, the non-deceleration slit 16a is provided at a position closer to the support-side link member 11 than the deceleration slit 16c with the transition point 16b as a boundary. At this time, the angle formed between the non-deceleration slit 16a and the deceleration slit 16c at the transition point 16b is set to, for example, about 150° as described later, so that the guide pin 15 can smoothly move obliquely upward just before the open state.

[0068] The mounting member 18 mounted on the inner case 5 is provided with a rotation damper 14 that functions as a deceleration member. The rotation damper 14 includes a deceleration gear 14a provided on the rotor shaft. The deceleration gear 14a is configured to mesh with a connecting rod gear 13d formed on a connecting rod base 13a of the deceleration-side connecting rod member 13. With this structure, the force acting on the deceleration-side connecting rod member 13 can be efficiently and reliably transmitted to the rotation damper 14 (deceleration member).

[0069] The rotary damper 14 is configured to apply a braking force to the rotary motion of the rotor by utilizing the viscous resistance of the oil filled inside when the built-in rotor rotates under the action of power transmission from, for example, an input portion (for example, the deceleration side link member 13). In addition, the deceleration member is not limited to the rotary damper 14, and any member can be used as long as it can brake the rotation of the deceleration side link member 13.

[0070] Usually, as the opening action by the self-weight of the first door 3a and the second door 3b proceeds, the opening speed of the first door 3a and the second door 3b increases (becomes faster). Therefore, in the present embodiment, a rotary damper 14 connected to the deceleration side link member 13 is provided. Thus, the braking force of the rotary damper 14 acts in a manner that slows down the opening speed of the first door 3a and the second door 3b. As a result, the first door 3a and the second door 3b can be prevented from opening rapidly under the action of gravity.

[0071] In addition, if Figure 3As shown in FIG. 1 , when the door 3 is closed, the first latch 20 provided on the first door 3a engages with the first engaged portion 22 of the first engaging arm member 21 that rotates around the first arm shaft 24. That is, the first door 3a is locked and cannot rotate. In addition, the second latch 30 provided on the second door 3b engages with the second engaged portion 29 (see FIG. 1 ) disposed at the front of the side of the inner box 5 of the box body 2. Figure 2 ) is engaged. That is, the second door 3b also becomes a locked state that cannot be rotated. As a result, the opening 9 of the box body 2 is closed liquid-tightly by the door 3, and the cleaning chamber 6 is sealed.

[0072] Next, refer to Figure 5 and Figure 6 Explanation from the above Figure 3 The opening and closing mechanism and opening and closing action of the door 3 when the closed state is slightly moved toward the opening direction.

[0073] Figure 5 The first door 3a and the second door 3b are from Figure 3 Interior side view of the closed position shown moved slightly towards the open direction. Figure 6 yes Figure 5 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged.

[0074] First, in Figure 3 In the closed state of the door 3 shown, the user touches the touch pad 37 on the front of the second door 3b or presses the lock release button 41 on the side of the second door 3b. As a result, the engagement between the second engaged portion 29 of the box 2 and the second latch 30 of the second door 3b is released, and the second latch 30 is in the lock release state.

[0075] At this time, the second door 3b is supported by the second supporting member 17, a part of the supporting side link member 11, and a part of the first supporting member 12. Therefore, the second door 3b rotates with the first supporting shaft 45, which functions as a rotation reference shaft, as the rotation center. That is, when the lock of the second latch 30 is released, the moment (i.e., torque) of the force generated by the dead weight acts on the second door 3b with the first supporting shaft 45 as the rotation center. Therefore, the second door 3b intends to rotate downward with the first supporting shaft 45 as the rotation center. At this time, the upper end 11a of the supporting side link member 11 rotates with the link shaft 46 as the rotation center to the side opposite to the side where the first door 3a is located. As a result, the pressing of the upper end 11a of the supporting side link member 11 on the pressed portion 23 of the first engaging arm member 21 is released. Moreover, the engagement between the first latch 20 of the first door 3a and the first engaged portion 22 of the first engaging arm member 21 is released. As a result, the first latch 20 is brought into the unlocked state.

[0076] As described above, the lock of the first latch 20 is released in conjunction with the lock release of the second latch 30 .

[0077] Then, when the lock of the first latch 20 is released, the moment (i.e., torque) of the force generated by the deadweight acts on the first door 3a with the first support shaft 45 as the rotation center. Therefore, the first door 3a also intends to rotate downward with the first support shaft 45 as the rotation center. And, when the first door 3a and the second door 3b rotate downward with the first support shaft 45 as the rotation center, the upper end portion 11a of the support side link member 11 is pushed up in a manner of moving along a predetermined trajectory. Moreover, the guide pin 15 protruding from the upper end portion 11a of the support side link member 11 is guided and moved by the slit 16 of the deceleration side link member 13. At this time, the non-deceleration slit 16a of the slit 16 is formed as described above into a shape (direction) substantially the same as the trajectory along which the guide pin 15 moves as the support side link member 11 rotates. Therefore, as Figure 6 As shown in FIG. 1 , the guide pin 15 only moves along the non-deceleration slit 16a and does not have any effect on the deceleration side link member 13. Figure 3 The closed state plays a role Figure 5 The deceleration-side link member 13 does not rotate until the first door 3a and the second door 3b are in the open position shown.

[0078] Next, refer to Figure 7 and Figure 8 Explanation from the above Figure 5 The state shown further shows the opening and closing mechanism and the opening and closing operation of the door 3 when it is moved in the opening direction.

[0079] Figure 7 The first door 3a and the second door 3b are from Figure 5 The state shown is an internal side view when it is further moved in the opening direction. Figure 8 yes Figure 7 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged. Figure 8 This shows a state where the guide pin 15 is located at the switching point 16b.

[0080] That is to say, Figure 8 The guide pin 15 moves only along the non-deceleration slit 16a until the transition point 16b of the slit 16 shown in FIG. Figure 7 The deceleration side link member 13 does not substantially rotate at the opening position of the first door 3a and the second door 3b shown. In addition, the position of the switching point 16b of the slit 16 can be arbitrarily changed within the range of the slit 16. Thus, for the opening action of the first door 3a and the second door 3b achieved by the rotary damper 14, the time when the door 3 starts to decelerate can be arbitrarily adjusted.

[0081] Next, refer to Fig. 9 and Fig.10 Explanation from the above Figure 7 The state shown further shows the opening and closing mechanism and the opening and closing operation of the door 3 when it is moved in the opening direction.

[0082] Fig. 9 The first door 3a and the second door 3b are from Figure 7 The state shown is an internal side view when it is further moved in the opening direction. Fig.10 yes Fig. 9 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged. Fig.10 The guide pin 15 is shown in a state where it is located in the deceleration slit 16c.

[0083] That is to say, Fig.10 As shown, when the guide pin 15 is located at the deceleration slit 16c of the slit 16, the rod portion 13b of the deceleration side link member 13 is pushed up with the arm shaft 48 as the rotation center. As a result, the link base 13a of the deceleration side link member 13 rotates with the arm shaft 48 as the rotation center, for example, in the counterclockwise direction. And, under the action of the rotation of the link base 13a, the rotary damper 14 connected to the link base 13a by means of the link gear 13d and the deceleration gear 14a rotates or rotates. That is, in Fig. 9 At the open position of the first door 3a and the second door 3b shown in the figure, the rotary damper 14 is operated by the rotation of the deceleration side link member 13. Therefore, the opening action (opening speed) of the first door 3a and the second door 3b is decelerated by the braking force of the rotary damper 14. With this structure, the guide pin 15 protruding from the support side link member 11 is guided and moved along the deceleration slit 16c of the slit 16 of the deceleration side link member 13. Thus, the deceleration action of the opening speed of the first door 3a and the second door 3b achieved by the rotary damper 14 can be simply and reliably achieved.

[0084] Next, refer to Fig.11 and Fig.12 Explanation from the above Fig. 9 The state shown further shows the opening and closing mechanism and the opening and closing operation of the door 3 when it is moved in the opening direction.

[0085] Fig.11 The first door 3a and the second door 3b are from Fig. 9 The state shown is an internal side view when it is further moved in the opening direction. Fig.12 yes Fig.11 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged. Fig.12 The guide pin 15 is shown in a state where it is located in the deceleration slit 16c.

[0086] That is to say, Fig.11 At the opening position of the first door 3a and the second door 3b shown, the rotary damper 14 is operated by the rotation of the deceleration side link member 13. Therefore, the opening action of the first door 3a and the second door 3b is decelerated by the braking force of the rotary damper 14.

[0087] Next, refer to Fig.13 and Fig.14 Explanation from the above Fig.11 The state shown further shows the opening and closing mechanism and the opening and closing operation of the door 3 when it is moved in the opening direction.

[0088] Fig.13 The first door 3a and the second door 3b are from Fig.11 The state shown is an internal side view when it is further moved in the opening direction. Fig.14 yes Fig.13 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged. Fig.14 The guide pin 15 is shown in a state where it is located in the deceleration slit 16c.

[0089] That is to say, Fig.13 At the opening position of the first door 3a and the second door 3b shown, the rotary damper 14 is operated by the rotation of the deceleration side link member 13. Therefore, the opening action of the first door 3a and the second door 3b is decelerated by the braking force of the rotary damper 14.

[0090] in addition, Fig.13 The open position shown is a state slightly forward of the first door 3a and the second door 3b being fully opened. Therefore, as the deceleration side link member 13 rotates, the deceleration slit 16c is arranged to extend in a substantially lateral direction (including the lateral direction), that is, a substantially horizontal direction (including the horizontal direction).

[0091] Next, refer to Fig.15 and Fig.16 Explanation from the above Fig.13 The state shown further shows the opening and closing mechanism and the opening and closing operation of the door 3 when it is moved in the opening direction.

[0092] Fig.15 The first door 3a and the second door 3b are from Fig.13 The state shown is an internal side view when the state is further moved in the opening direction to become a fully opened state. Fig.16 yes Fig.15 The main part around the opening and closing mechanism of the dishwasher 1 is enlarged. Fig.16 The guide pin 15 is shown in a state where it is located in the deceleration slit 16c.

[0093] That is to say, Fig.15At the opening position of the first door 3a and the second door 3b shown, the rotary damper 14 is operated by the rotation of the deceleration side link member 13. Therefore, the opening action of the first door 3a and the second door 3b is decelerated by the braking force of the rotary damper 14.

[0094] In addition, Fig.15 In the open state shown in FIG. 1 , the deceleration slit 16c is arranged to extend obliquely upward toward the end portion side (door 3 side) of the rod portion 13b of the deceleration side link member 13. In addition, the guide pin 15 of the support side link member 11 is arranged from Fig.13 The state shown is from the position where the guide pin 15 is folded back and slightly returned in the deceleration slit 16c. With this structure, when the guide pin 15 is about to move obliquely upward, the guide pin 15 can be smoothly moved along the deceleration slit 16c extending obliquely upward.

[0095] As described above, when the closed state of the first door 3a and the second door 3b implemented by the first latch 20 and the second latch 30 as the locking part is released, the first door 3a and the second door 3b are opened under the action of their own weight. Therefore, it is not necessary to separately provide other opening components such as elastic bodies and drivers. In other words, the opening operation of the first door 3a and the second door 3b can be easily and reliably performed with a simple structure.

[0096] The opening and closing mechanism of door 3 of dishwasher 1 is configured as described above, and the opening and closing operation of door 3 is performed.

[0097] Below, refer to Fig.17 and Fig.18 The structures of the above-mentioned mounting member 18 and the speed reduction-side link member 13 will be described in more detail.

[0098] Fig.17 It is an exploded perspective view of the mounting member 18 and the speed reduction-side link member 13 of the dishwasher 1 .

[0099] Fig.18 Observed from below Fig.17 A perspective view of the deceleration side link member 13.

[0100] like Fig.15 As shown, the mounting member 18 is mounted on the box body 2. Fig.17As shown, the mounting member 18 has a spring receiving portion 18a on the outer periphery of the arm shaft 48 that passes through the mounting member 18. An elastic member such as a torsion spring 19 is received in the spring receiving portion 18a. The spring receiving portion 18a receiving the torsion spring 19 is covered by the link base 13a of the deceleration side link member 13. The torsion spring 19 functions as a closing direction force member that forces the first door 3a and the second door 3b in the closing direction. That is, the torsion spring 19 applies force to the deceleration side link member 13 to apply force to the first door 3a and the second door 3b in the closing direction. With this structure, the torsion spring 19 reduces the force required for the user to close the first door 3a and the second door 3b.

[0101] 〔Door locking device〕

[0102] Below, refer to Figure 19 to Figure 30 The structure of locking device 40 of second door 3b of door 3 of dishwasher 1 will be described.

[0103] Figure 19 to Figure 30 It is a figure explaining the locking device 40 of the second door 3b.

[0104] First, refer to Fig.19 and Fig. 20 The schematic structure of the second door 3b will be described.

[0105] Fig.19 It is a three-dimensional diagram of the second door 3b. Fig. 20 It is a rear view of the second door 3b.

[0106] like Fig.19 and Fig. 20 As shown, the second door 3b has, for example, a rectangular outer shell 31 and an inner shell 32. The second door 3b has a lock release button 41 for manually releasing the lock, which is provided on one side and the other side of the left and right sides thereof. Thus, the second door 3b has a design with a relatively neat appearance at the front.

[0107] The inner housing 32 has second latches 30 as locking portions provided on one and the other of the left and right edges of the main surface. The inner housing 32 also has an electric motor housing portion 32a formed inward of the edge of one side of the main surface.

[0108] The electric motor storage portion 32a is formed in a shape that bulges outwardly and rearwardly from the main surface of the inner shell 32. The electric motor storage portion 32a forms a space for separating an electric motor 33a of an electric driver 33 described later from the washing chamber 6. With this structure, the electric motor 33a is not easily affected by the heat from warm water during washing and warm air during drying.

[0109] Next, refer to Figure 21 to Figure 30 The locking device 40 of the second door 3b will be described.

[0110] Fig.21 is from Fig. 20 The second door 3b shown is a perspective view with the inner shell 32 removed. Fig. 22 yes Fig.21 Exploded three-dimensional diagram. Fig.23 yes Fig.21 An enlarged view of the main part. Fig.24 yes Fig.23 Stereoscopic diagram. Fig.25 is from Fig. 20 The second door 3b is shown in a top view with the outer shell 31 removed. Fig.26 It is an enlarged view of the main part when the lock release button 41 is not pressed. Fig. 27 This is an enlarged view of the main parts after the lock release button 41 is pressed.

[0111] Fig.28 It is a diagram showing the electric actuator 33 and the latch member 50 . Fig.29 It is a perspective view for explaining the engagement relationship between the electric actuator 33 and the latch member 50 . Fig.30 It is a perspective view for explaining the engagement relationship between the electric actuator 33 and the latch member 50 .

[0112] In the dishwasher 1 of the present embodiment, there are two methods as shown below as methods for unlocking the door 3. Specifically, there is a method in which the user presses the lock release button 41 to mechanically unlock the door 3 and a method in which the user touches a predetermined portion of the capacitive touch panel 37 to electrically unlock the door 3.

[0113] Therefore, a method of electrically unlocking the door 3 using the touch pad 37 will be described below.

[0114] Touch pad 37 (see Fig.19 ) is arranged at the front part of the second door 3b and is connected to the control unit 10 (refer to Fig.21 ) is electrically connected. In addition, the control unit 10 can also be set as a structure arranged inside the box 2.

[0115] Furthermore, the electric driver 33 is electrically connected to the control unit 10 . Thus, the operation of the electric driver 33 is controlled based on a signal from the control unit 10 .

[0116] That is, the user first touches a predetermined position of the touch pad 37 of the second door 3b, for example, for about 0.5 seconds. As a result, the control unit 10 instructs the electric driver 33 to open the door 3. More specifically, after the user touches the predetermined position of the touch pad 37, for example, for about 0.5 seconds, after about 1 second, for example, the electric motor 33a is driven for about 0.5 seconds. Under the action of this driving, the second latch 30 is rotated by the electric driver 33, and the lock of the second door 3b is released.

[0117] Then, when the lock of the second door 3b is released, the second door 3b starts to open under the action of its own weight. At this time, as described above, the dishwasher 1 of this embodiment is configured so that the first door 3a also starts to open as the support-side link member 11 rotates.

[0118] Next, refer to Fig.21 and 22 A schematic structure of the locking device 40 of the second door 3b will be described.

[0119] like Fig.21 and Fig. 22 As shown in FIG. 1 , the locking device 40 includes at least a latch member 50, an electric drive 33, and a latch link member 34. The latch members 50 are respectively arranged on one side and the other side of the second door 3b in the left-right direction. The electric drive 33 is arranged on one side of the second door 3b in the left-right direction. The latch link member 34 is arranged to connect the left and right latch members 50 together. Fig. 22 As shown, the latch members 50 are connected together using a rod-shaped latch link member 34 extending in the transverse direction from one side to the other side.

[0120] Furthermore, in order to drive the second latches 30 on one side and the other side in the left-right direction, the second door 3b accommodates the control unit 10, the latch members 50 disposed on one side and the other side constituting the locking device 40, the electric driver 33, the latch link member 34, etc. In other words, the second door 3b has built-in components for driving the second latch 30 by the locking device 40 so that the second latch 30 is in the unlocked state or the locked state.

[0121] In this embodiment, the electric driver 33 for driving the second latch 30 on one side is arranged inside the second door 3b. Therefore, compared with the case where the electric driver 33 is arranged on the side of the box body 2, the inner volume of the washing chamber 6 can be made larger. In addition, there is no separate driving force transmission member for driving the second latch 30. Therefore, the lock release of each second latch 30 can be easily and reliably performed with a simple structure.

[0122] Next, for example, refer to Figure 28 to Figure 30The structure of the latch member 50 disposed on one side will be described.

[0123] The latch members 50 on one side and the other side are symmetrically configured on the left and right sides of the second door 3b. Therefore, the structure of the latch member 50 on the other side is the same as that of the latch member 50 on one side, and thus the description thereof is omitted.

[0124] The latch member 50 includes a rotating portion 58, a shaft portion 51 provided on both sides of the rotating portion 58, a second latch 30, an output connecting portion 52, and the like. The shaft portion 51 is formed in a cylindrical shape and is supported by shaft supporting portions formed in the outer shell 31 and the inner shell 32 so as to be rotatable. The rotating portion 58 is formed in a cylindrical shape having a diameter larger than that of the shaft portion 51. The rotating portion 58 has a motion conversion portion 54 and a spring locking portion 56 extending radially outward. The second latch 30 constitutes an engaging claw engaged with the second engaged portion 29 of the housing 2. The second latch 30 is arranged at the top end of the shaft portion 51 provided on one side of the rotating portion 58, i.e., the outer side, which is located at the outer side. On the other hand, the output connecting portion 52 is arranged at the top end of the shaft portion 51 provided on the other side of the rotating portion 58, i.e., the inner side, which is located at the inner side.

[0125] The motion conversion unit 54 has Fig.26 The sliding contact surface 42 of the lock release button 41 shown in the figure slides in contact with the motion conversion surface 55. Fig.23 and Fig.26 As shown, the motion conversion surface 55 is provided on the side facing the inner housing 32 (that is, the side of the latch member 50 on which the second latch 30 is provided).

[0126] The rotating portion 58 has a function to adjust the tension spring 39 (see Figure 21 to Figure 24 ) is locked with a spring locking portion 56. Similarly, the housing 31 has a spring locking portion 31b for locking the other end of the tension spring 39. Fig. 27 As shown, the spring locking portion 56 is provided on the side facing the inner shell 32 (that is, the side of the latch member 50 provided with the second latch 30). Furthermore, the tension spring 39 is used to make the second latch 30 and the second engaged portion 29 of the box body 2 (see Figure 2 ) engage with each other to apply force to the second latch 30 in the locking direction.

[0127] like Fig.29 and Fig.30 As shown, the output connection portion 52 has a shaft recess 53 and a connecting rod recess 57 that are recessed toward the second latch 30 along the axial direction of the rotating portion 58 of the second latch 30. The shaft recess 53 is configured to receive the output shaft 35 and two shaft protrusions 36 of the electric driver 33 described later. The connecting rod recess 57 is formed as a recessed portion in an L shape when viewed from the side, for example, and is configured to receive the end of the latch link member 34.

[0128] The electric actuator 33 is arranged near the latch member 50 on one side. The electric actuator 33 includes an electric motor 33a as a driving source and a reduction gear group 33b for reducing the rotation speed of the motor shaft of the electric motor 33a. Figure 21 to Figure 24 The control unit 10 shown in the figure is electrically connected. In addition, the control unit 10 is used to control the rotation of the motor shaft of the electric motor 33a. The reduction gear group 33b includes a plurality of reduction gears, which are connected to the motor shaft of the electric motor 33a. The reduction gear is used to reduce the rotation of the motor shaft. As a result, the rotation torque increased by the reduction is output from the output shaft 35 of the reduction gear group 33b to the latch member 50. The output shaft 35 is extended along the axial direction of the rotating portion 58 of the second latch 30, and has two shaft protrusions 36 arranged at positions separated in the circumferential direction.

[0129] Moreover, the output shaft 35 of the electric driver 33 is connected to the latch member 50 by means of the output connecting portion 52 of the latch member 50 on one side. Thus, the latch member 50 is directly driven by the electric driver 33. At this time, the latch member 50 on the other side is connected to the latch member 50 on one side by means of the latch link member 34. With this structure, the latch member 50 on one side is driven by one electric driver 33 to release the lock of the second latch 30 on one side and the other side. Therefore, the lock of the second latch 30 can be released with a low-cost structure. Moreover, compared with the case where the electric driver 33 is also provided on the latch member 50 on the other side, the weight of the second door 3b can be reduced, so the second door 3b is easy to close. In addition, the latch member 50 on one side is directly driven by the electric driver 33. That is, a structure in which no other driving force transmission member exists between the latch member 50 and the electric driver 33 can be formed. Therefore, the lock release of the second latch 30 with high reliability can be performed with a low-cost structure.

[0130] In addition, when the second door 3b is closed, the second latch 30 on one side is urged in the locking direction by the tension spring 39 so that the second latch 30 is engaged with the second engaged portion 29 to enter the locked state. When the electric driver 33 is operated in this state, a high rotation torque is output from the output shaft 35 of the electric driver 33. Then, the latch member 50 overcomes the force of the tension spring 39 under the action of the high rotation torque and rotates in the unlocking direction. As a result, the engagement between the second latch 30 on one side and the second engaged portion 29 is released, and the latch member 50 enters the unlocked state.

[0131] When the locking of the second latch 30 on one side is released, the second latch 30 on the other side connected via the latch link member 34 is also simultaneously released.

[0132] Furthermore, as described above, the first latch 20 is also unlocked in conjunction with the unlocking of the second latches 30 on one side and the other side. When the first latch 20 and the second latch 30 are unlocked, the first door 3a and the second door 3b open under their own weight. At this time, the opening action (opening speed) of the first door 3a and the second door 3b is decelerated at an appropriate time by the deceleration side link member 13 and the rotary damper 14.

[0133] As described above, the door 3 is unlocked by an electric method.

[0134] Next, a method of manually unlocking the door 3 using the lock unlocking button 41 will be described.

[0135] like Fig.25 and Fig.26 As shown in FIG. 1 , the end of the lock release button 41 that is closer to the inner side than the button operation portion (the surface pressed by the user) is urged toward the outside by a compression spring 43. Fig.21 and Fig. 22 That is, when the user stops pressing the lock release button 41, the lock release button 41 returns to the original protruding position protruding from the button window 31a under the urging force of the compression spring 43.

[0136] In addition, the lock release button 41 has the above-mentioned sliding contact surface 42 between the button operation portion and the inner end portion. Fig.26 As shown in FIG. 1 , the sliding contact surface 42 is formed in a spiral shape in which the height of the inclined portion gradually increases from the inside (right) to the outside (left). Specifically, with the left upper end surface of the sliding contact surface 42 as a reference, the right lower end surface is directed toward the latch member 50 side, and when the lock release button 41 is viewed from the left side, the sliding contact surface 42 is formed in a shape twisted, for example, by about 30 degrees in the clockwise direction. In addition, the sliding contact surface 42 is configured so that the sliding contact surface 42 and the motion conversion surface 55 of the motion conversion portion 54 of the latch member 50 are elastically slidably contacted by the tension spring 39.

[0137] Furthermore, when the lock release button 41 is pressed inward, the lock release button 41 overcomes the force of the compression spring 43 and moves from the button window 31a toward the inside in the retracting direction. At this time, the spiral sliding contact surface 42 of the lock release button 41 and the motion conversion surface 55 of the latch member 50 elastically slide in contact, and the lock release button 41 moves inward. As a result, the latch member 50 rotates in the unlocking direction. As a result, the engagement between the second latch 30 and the second engaged portion 29 on one side and the other side is released, and the latch member 50 is in the lock release state.

[0138] As described above, the latch member 50 can be unlocked by manually operating the lock release button 41. Thus, the latch member 50 can be unlocked even in a situation where there is no power supply, such as during a power outage.

[0139] In addition, by utilizing the sliding contact between the motion conversion surface 55 of the latch member 50 and the sliding contact surface 42 of the lock release button 41, the second latches 30 on one side and the other side are directly driven by pressing the lock release buttons 41 on one side and the other side. In other words, it is a structure in which no other driving force transmission member exists between the latch member 50 and the lock release button 41. Therefore, the lock release of the second latch 30 can be performed with a low-cost structure with high reliability.

[0140] In addition, for a dishwasher, when the door 3 is opened during a washing operation, heated washing water may be scattered outside. Therefore, in the dishwasher 1 of the present embodiment, the control unit 10 stops the operation of the washing pump for spraying washing water, and then controls the electric motor 33a to release the lock of the first latch 20 and the second latch 30 after a predetermined time. Thus, the scattering of heated washing water to the outside can be prevented before it happens. That is, the control unit 10 controls in a manner that the lock release of the first latch 20 and the second latch 30 is not performed during the washing operation of the object to be washed in the washing chamber 6. Moreover, after the washing operation is stopped, the control unit 10 controls the electric driver 33 to release the lock of the first latch 20 and the second latch 30 after a predetermined time (for example, about 1 second). With this structure, during the washing operation, the first door 3a and the second door 3b can be prevented from being accidentally opened, and the washing water can be prevented from scattering to the outside.

[0141] As mentioned above, although the specific embodiment of the present invention was described, the present invention is not limited to the above-mentioned embodiment, and can be implemented with various modifications within the scope of the present invention.

[0142] Specifically, in the above embodiment, an example in which the door 3 is formed of two doors, namely the first door 3a and the second door 3b, is described, but the invention is not limited thereto. For example, the door may be formed of one door, three doors, or the like.

[0143] In addition, in the above-mentioned embodiment, the following structure is used as an example for explanation, that is, when the first door 3a and the second door 3b are in an open state, the first door 3a is approximately horizontally (including horizontally) located on the upper side in a manner that approximately overlaps (including overlapping) on ​​the second door 3b, but it is not limited to this. For example, it is also possible to configure the first door 3a to be located on the lower side and the second door 3b to be located on the upper side. In this way, the first door 3a and the second door 3b can be configured so as not to overlap each other.

[0144] In addition, in the above embodiment, the structure in which the locking device 40 is driven by the electric driver 33 having the electric motor 33a and the reduction gear set 33b is described as an example, but the present invention is not limited thereto. For example, the latch member 50 may be driven by various drivers such as an electromagnetic driver such as a solenoid or a hydraulic driver.

[0145] In addition, in the above-mentioned embodiment, the structure in which the electric motor 33a as the driving source of the locking device 40 is provided on one side and the second latch 30 on one side and the other side is driven respectively is described as an example, but it is not limited to this. For example, it is also possible to form a structure in which the driving source of the locking device 40 is provided on at least one of the one side and the other side, and at least one of the second latches 30 on the one side and the other side corresponding to the driving source is driven. In addition, it is also possible to form a structure in which the driving source is provided on both the one side and the other side. In the case of this structure, the latch link member 34 connecting the second latches 30 on one side and the other side can be omitted.

[0146] In addition, in the above-mentioned embodiment, the structure in which the second latch 30, which functions as a locking part for maintaining the closed state of the door 3, is provided on both one side and the other side of the door 3 is described as an example, but the present invention is not limited thereto. For example, a structure in which the second latch 30 is provided on either one side or the other side may be formed. In this case, it is desirable to provide a structure in which the lock release button 41 is provided on either one side or the other side in accordance with the installation position of the second latch 30.

[0147] In addition, in the above-mentioned embodiment, the structure in which the opening and closing mechanism of the door 3 including the deceleration member is disposed on the side portion of one side of the box body 2 is described as an example, but it is not limited to this. For example, it is also possible to form a structure in which the opening and closing mechanism is disposed on the side portion of the other side of the box body 2 or on both the side portions of one side and the other side of the box body 2.

[0148] As described above, a dishwasher 1 according to an example of an embodiment of the present invention includes: a housing 2 having an opening 9 for taking in and out objects 8 to be washed; a washing chamber 6 provided in the housing 2; a door 3 for opening and closing the opening 9; and a first latch 20 and a second latch 30, which are locking parts for maintaining the closed state of the door 3. Furthermore, the door 3 is configured so that when the closed state of the door 3 by the first latch 20 and the second latch 30 is released, the door 3 is opened by its own weight.

[0149] With this structure, when the closed state of the door 3 by the first latch 20 and the second latch 30 is released, the door 3 opens under the action of its own weight. Therefore, it is not necessary to provide other opening mechanisms such as elastic bodies and actuators. Thus, it is possible to provide a dishwasher 1 that can easily and reliably perform the opening action of the door 3 with a simple structure.

[0150] Furthermore, dishwasher 1 of the present embodiment is preferably configured such that door 3 opens by its own weight when the closed state of door 3 by first latch 20 and second latch 30 as the locking portion is released.

[0151] With this structure, when the closed state of the door 3 by the first latch 20 and the second latch 30 is released, the door 3 opens under the action of its own weight. Therefore, from the start of the opening action of the door 3 to the opening of the door 3, the door 3 can be opened even if the user does not apply force to the door 3. As a result, the operability and workability for the user can be improved.

[0152] In addition, the dishwasher 1 of the present embodiment includes: a first support member 12 and a second support member 17, which are support members that support the door 3 so as to be rotatable; and a rotation damper 14, which is a deceleration member for decelerating the opening action of the door 3. In addition, in the dishwasher 1, a support-side link member 11 and a deceleration-side link member 13, which are link members that connect the first support member 12 and the second support member 17 with the rotation damper 14, are arranged on the side of the housing 2. In addition, the rotation damper 14 is preferably a structure that decelerates the opening action of the door 3 supported by the first support member 12 and the second support member 17 by means of the support-side link member 11 and the deceleration-side link member 13.

[0153] According to this configuration, the opening speed of the door 3, which normally increases as the opening operation of the door 3 by its own weight progresses, is decelerated by the rotary damper 14. Therefore, it is possible to prevent the door 3 from opening rapidly.

[0154] In addition, the link member of the dishwasher 1 of the present embodiment includes: a supporting side link member 11 rotatably connected to the first supporting member 12 and the second supporting member 17 as supporting members; and a deceleration side link member 13 rotatably connected to the rotary damper 14. The supporting side link member 11 includes a guide pin 15, and the deceleration side link member 13 includes a slit 16 for guiding the guide pin 15. In addition, the slit 16 is preferably configured to have a deceleration slit 16c for decelerating the opening action of the door 3.

[0155] With this structure, the guide pin 15 provided on the support side link member 11 is guided and moved along the deceleration slit 16c provided on the deceleration side link member 13. At this time, the deceleration side link member 13 rotates to drive the rotary damper 14. Thus, the opening speed of the door 3 can be decelerated simply and reliably.

[0156] In addition, in dishwasher 1 of the present embodiment, it is desirable that slit 16 has non-decelerating slit 16a which does not decelerate the opening operation of door 3.

[0157] With this structure, the non-deceleration slit 16a is provided at a position closer to the support side link member 11 than the deceleration slit 16c. The non-deceleration slit 16a can be used to set the timing of the deceleration start in the opening action of the door 3. Therefore, the timing of the deceleration start in the opening action of the door 3 achieved by the rotary damper 14 can be easily adjusted.

[0158] Furthermore, dishwasher 1 of the present embodiment is preferably configured such that deceleration-side link member 13 is biased by torsion spring 19 as a closing direction biasing member that biases door 3 in the closing direction.

[0159] According to this structure, the force when closing the door 3 can be reduced by the torsion spring 19. This can improve the operability and workability of the user.

[0160] In the dishwasher 1 of the present embodiment, the speed reduction side link member 13 has the link gear 13d, and the rotary damper 14 has the speed reduction gear 14a. It is desirable that the link gear 13d and the speed reduction gear 14a are configured to mesh with each other.

[0161] With this structure, force can be efficiently and reliably transmitted between the deceleration side link member 13 and the rotary damper 14. In addition, when the weight of the door 3 is increased or decreased according to the purpose, the torque acting on the rotary damper 14 can be easily adjusted by changing the gear ratio between the link gear 13d and the deceleration gear 14a. That is, the deceleration speed of the door 3 can be easily and arbitrarily set to a desired speed using the above structure.

Claims

1. A dishwashing machine, wherein: The dishwasher comprises: A box body having an opening for taking in and placing objects to be cleaned; A cleaning chamber, which is arranged in the box; a door for opening and closing the opening; and a locking portion for maintaining the door in a closed state, When the closed state of the door achieved by the locking portion is released, the door opens under the action of its own weight. A support member for rotatably supporting the door, a deceleration member for decelerating the opening action of the door, and a link member for connecting the support member and the deceleration member are arranged on a side of the box body. The deceleration member decelerates the opening movement of the door supported by the support member via the link member, The connecting rod member comprises: a support-side link member rotatably connected to the support member; and a deceleration-side link member rotatably connected to the deceleration member, The support-side link member includes a guide pin, The deceleration-side link member includes a slit for guiding the guide pin. The slit includes a deceleration slit for decelerating the opening operation of the door.

2. The dishwasher according to claim 1, wherein: When the closed state of the door achieved by the locking portion is released, the door opens under its own weight.

3. The dishwasher according to claim 1, wherein: The slit includes a non-decelerating slit that does not decelerate the opening operation of the door.

4. The dishwasher according to claim 1, wherein: The deceleration-side link member is biased by a closing-direction biasing member that biases the door in a closing direction.

5. The dishwasher according to claim 1, wherein: The deceleration-side link member has a link gear, The deceleration member has a deceleration gear. The connecting rod gear and the reduction gear are configured to mesh with each other.

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