# Patent

## Title
Dryer

## Abstract

Disclosed is an apparatus for opening/closing a door of a dryer, by which the door is opened/closed more simply and swiftly. The present invention includes a housing, a drum rotatably installed in the housing, a heating apparatus for supplying hot air to the drum, a door opening/closing an entrance formed at the housing for putting a laundry in the drum, and an apparatus for opening/closing the door. And, the apparatus for opening/closing the door includes a hook provided at one side of the door of the dryer, the hook having a hanging portion at one end, a latch body provided to the housing in the vicinity of the entrance wherein the hanging portion is inserted the latch body, a pair of holders provided to confront each other in the latch body to hold the hanging portion, a pair of springs provided in rear of the holders, respectively, and a support member provided to the latch body to support each of the springs to move stably.

## Background
This application claims the benefit of Korean Application(s) No. 10-2002-0075011filed on Nov. 28, 2002, which is/are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a dryer, and more particularly, to an apparatus for opening/closing a door of a dryer.
2. Discussion of the Related Art
Generally, a dryer is an apparatus for drying a washed laundry quickly using hot air. Lately, a washing machine equipped with a drying function has been developed as well.
FIG. 1 is a perspective view of a dryer according to a related art.
Referring to FIG. 1, a dryer according to a related art consists of a case 2, a drum 4, a heater (not shown in the drawing), and a motor (not shown in the drawing).
An opening 2a via which a laundry is put in or pulled out of the drum 4 is formed at a front side of the case 2. The drum 4 is rotatably installed in the case 2 to communicate with the opening 2a. A plurality of lifters 3 protrude from an inner conference of the drum 4 to lift the laundry in the drum 4 to fall.
The heater (not shown in the drawing) generating hot air for drying the laundry and the motor (not shown in the drawing) for rotating the drum 4 are installed outside the drum 4.
The case 2 consists of a cabinet 32, a front panel 33, a top cover 35, and a control panel 36.
The front panel 33 having the opening 2a formed at its front side is provided to a front side of the cabinet 32. The top cover 35 is provided to a top of the cabinet 32. The control panel 36 is provided on a rear top of the top cover 35. And, electronic units for controlling the dryer are installed in the control panel 36.
Meanwhile, a door 10 is provided at one side of the opening 2a in the front panel 33 to open/close the opening 2a. 
The door 10 consists of a hook 30 and a latch assembly 34. The hook 30 is fixed to one side of the door 10 using screws 31, and the latch assembly 34 is fixed to one side of the front panel 33 using screws 34a. And, the door 10 is provided to a hinge 12 fixed to the front panel 33 in the vicinity of the opening 2a to revolve centering around the hinge 12.
The latch assembly 34 locks or unlocks the hook 30 installed at the door 10 according to a signal of a control unit. In this case, a user freely enables to open/close the door 10 while power is not applied to a door lock switch separately installed at one side of the dryer.
Meanwhile, while the door 10 is closed and the power is applied to the door lock switch, the latch assembly 34 keeps locking the hook 30 so that the door 10 is unable to be opened.
However, the related art dryer has the following problem or disadvantage.
First of all, the dryer differs from a washing machine in that water is not held in the dryer. Hence, the user needs to open the door in order to put more dry objects in the dryer in progress or in order to check a drying state of the laundry while the dryer operates. In this case, the structure of the apparatus for opening/closing the door of the dryer is equal or similar to that of the washing machine. Hence, it is inconvenient or takes pains to open/close the door.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a dryer that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention, which has been devised to solve the foregoing problem, lies in providing a dryer equipped with a door that can be opened/closed more simply and swiftly.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent to those having ordinary skill in the art upon examination of the following or may be learned from a practice of the invention. The objectives and other advantages of the invention will be realized and attained by the subject matter particularly pointed out in the specification and claims hereof as well as in the appended drawings.
To achieve these objects and other advantages in accordance with the present invention, as embodied and broadly described herein, there is provided a dryer including a housing, a drum rotatably installed in the housing, a heating apparatus for supplying hot air to the drum, a door opening/closing an entrance formed at the housing for putting a laundry in the drum, and an apparatus for opening/closing the door. And, the apparatus for opening/closing the door includes a hook provided at one side of the door of the dryer, the hook having a hanging portion at one end, a latch body provided to the housing in the vicinity of the entrance wherein the hanging portion is inserted the latch body, a pair of holders provided to confront each other in the latch body to hold the hanging portion, a pair of springs provided in rear of the holders, respectively, and a support member provided to the latch body to support each of the springs to move stably.
In this case, the latch body includes a first reception part receiving the hanging portion and a pair of second reception parts provided adjacent to both sides of the first reception part to hold to guide the holders, respectively. And, a pair of passing holes communicating with the second reception parts are formed at both of the sides of the first reception part to let the holders pass through, respectively.
Moreover, a recess (step) is formed at one end of each of the second reception parts to support the corresponding spring. And, a hanging protrusion is formed on one side of each of the holders to be held by an upper end of the first reception part.
Meanwhile, the hanging portion has a triangular cross-section. In this case, confronting planes of the holders are inclined to correspond to the triangular cross-section of the hanging portion.
A surface of the hanging portion to be brought contact with the holders is rounded, and two confronting tips of the holders are rounded.
Moreover, a hollow portion is provided at a rear side of each of the holders to have one end of the corresponding spring inserted therein.
Meanwhile, the dryer further includes a latch cap covering the first and second reception parts to prevent separation of the holders and the springs.
In this case, fixing protrusions protrude from a bottom of the latch cap to hold one ends of the springs, respectively. And, guide protrusions protrude from a bottom of the latch cap to guide to move the holders, respectively.
Moreover, coupling holes are formed at corners of the latch cap and wherein bolts are screwed in the coupling holes, respectively to fix the latch cap to the latch body. And, the hook is built in one body of a fixing plate screw-coupled to one side of the door.
And, coupling holes are formed at both sides of the latch body and wherein bolts are screwed in the coupling holes, respectively to fix the latch body to the front panel.
Preferably, the support member establishes an installation location of the corresponding spring. Specifically, the support member forms a receiving part for holding at least a portion of the corresponding spring. Hence, the support member prevents the corresponding spring from fluctuating and lifts the corresponding spring to a predetermined height, whereby the support member matches a center of the corresponding spring to that of the corresponding holder.
Preferably, the support member includes a pair of vertical ribs installed at both lateral sides of the corresponding spring and a horizontal rib installed beneath the corresponding spring.
Therefore, the present invention facilitates to open/close the door, thereby enabling to provide a user with convenience of use.
It is to be understood that both the foregoing explanation and the following detailed description of the present invention are exemplary and illustrative and are intended to provide further explanation of the invention as claimed.



BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
FIG. 1 is a perspective view of a dryer according to a related art;
FIG. 2 is a perspective view of a dryer according to the present invention;
FIG. 3 is a cross-sectional view of an apparatus for opening/closing a door of a dryer according to the present invention;
FIG. 4 is a perspective view of a disassembled latch assembly according to the present invention;
FIG. 5 is a cross-sectional view of a latch body of a latch assembly according to the present invention;
FIG. 6 is a layout of a latch assembly according to the present invention; and
FIG. 7 is a rear view of a latch assembly according to the present invention.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Reference will now be made in detail to the preferred embodiment(s) of the present invention, examples of which are illustrated in the accompanying drawings. Throughout the drawings, like elements are indicated using the same or similar reference designations where possible.
FIG. 2 is a perspective view of a dryer according to one embodiment of the present invention.
Referring to FIG. 2, a dryer according to one embodiment of the present invention includes a case 52, a drum 54, a heater (not shown in the drawing), a motor (not shown in the drawing), and a door 70.
An opening 52a is formed at a front side of the case 52. The drum 54 is provided in the case 52 to hold a laundry inside. A plurality of lifters 53 are provided to protrude from an inner circumference of the drum 54 to lift the laundry in the drum 54 to fall. The heater generating dry hot air for drying the laundry is provided outside the drum 54. And, the dry hot air is blown into the drum 54 by a fan (not shown in the drawing). The motor (not shown in the drawing) for rotating the drum 4 is provided outside the drum 54 to rotate the drum 54.
The case 52 includes a cabinet 62, a front panel 63, a top cover 65, and a control panel 66.
The front panel 63 having the opening 52a formed at its center is provided to a front side of the cabinet 62. The top cover 65 is provided to a top of the cabinet 62. The control panel 66 is provided on a rear top of the top cover 65. An operation control unit 66a for controlling an operation of the dryer and an operation display unit 66b are installed on a front side of the control panel 66, and electronic units for controlling the dryer are loaded in the control panel 66.
Meanwhile, the door 70 is provided at one side of the opening 52a in the front panel 63 to open/close the opening 52a. And, the door 70 is provided to a hinge 72 fixed to the front panel 63 in the vicinity of the opening 52a to revolve centering around the hinge 72.
FIG. 3 is a cross-sectional view of an apparatus for opening/closing a door according to the present invention.
Referring to FIG. 3, the door 70 includes a hook 71 having a hanging portion 73 and a latch assembly 80.
The hook 71 is formed to protrude from a fixing plate 75 fixed to the door 70. The fixing plate 75 is fixed to a portion of the door 70 opposite to the other portion coupled to the hinge 63 using bolts 71a. And, the hanging portion 73 having a triangular cross-section is formed at one end of the hook 71.
Moreover, the latch assembly 80 for catching or releasing the hook 71 thereon is fixed to the front panel 63 using bolts 80a. 
The latch assembly 80 includes a latch body 81, a holder 85, a pair of springs 90, and a latch cap 87.
The latch body 81 includes an insertion hole 81a in which the hook 71 is inserted. The holder 85 is provided with a pair confronting each other in the latch body 81, and two confronting one ends of the holder 85 are slant to form incline planes, respectively. The hanging portion 73 of the hook 71 is inserted in the latch body 81 by sliding in along the incline planes so as to be held by the holder 85. A pair of the springs 90 are provided to the other ends of the holder 85, respectively. The springs 90 are elastically compressed when the hanging portion 73 is inserted, whereby the holder 85 moves backward. If an external force applied to the holder 85 is released, the springs 90 return the holder 85 back to its original position. And, the latch cap 871s coupled to a rear side of the latch body 81 to prevent the separation of the holder 85 and the springs 90.
A coupling mechanism between the hook 71 and the latch assembly 80 is explained in detail as follows.
First of all, the hanging portion 73 protruding triangularly is provided to the tip of the hook 71, and the incline planes provided to the one ends of the holder 85 correspond to an incline plane of the hanging portion 73.
The holder 85, as shown in FIG. 3, includes first and second holders 85a and 85b provided at both sides of the latch body 81 to confront each other.
When the door 70 is closed, the hanging portion 73 of the hook 71 is inserted in the latch body 81 via the insertion hole 81a. Another incline plane, as shown in FIG. 3, FIG. 5, and FIG. 6, is formed inward in the insertion hole 81a to lead the hanging portion 73 to the latch body 81 smoothly. The hanging portion 73 is inserted to slide along the incline planes of the first and second holders 85a and 85b. In this case, the first and second holders 85a and 85b move backward as the springs 90 are elastically compressed by the insertion of the hanging portion 73. Once such an insertion is completed, the springs 90 return to original positions, respectively, and a rear end of the hanging portion 73 is caught on the first and second holders 85a and 85b. Hence, the hook 71 is fixed to the latch assembly 80 so that the door 70 maintains to be closed.
Moreover, tips of the holder 85 are rounded, and a surface of the hanging portion brought contacted with the tips of the holder 85 to be held is rounded as well. Hence, if the door 70 is pulled by a certain force, the springs 90 are compressed to move the holder 85 backward so that the user enables to open the door 70 conveniently.
FIG. 4 is a perspective view of a disassembled latch assembly according to the present invention and FIG. 5 is a cross-sectional view of a latch assembly according to the present invention.
Referring to FIG. 4 and FIG. 5, a rectangular first reception part 82 is formed on a central portion of the latch body 81, and the hook 71 is inserted in the first reception part 82. A pair of passing holes 82a are formed at both sides of the first reception part 82 to communicate with a pair f second reception parts 83, respectively. The second reception parts 83 are provided adjacent to both sides of the first reception part 82, respectively to hold and guide the holder 85. Hence, the holder 85 enables to reciprocate between the first and second reception parts 82 and 83 through the passing holes 82a. 
A support 84 is formed at an end of each of the second reception parts 83 to support one end of the corresponding spring 90. A center of the support 84 is recessed to provide a step so that a loaded location of the corresponding spring 90 is fixed thereto, whereby the corresponding spring 90 loaded in the latch body 81 is prevented from fluctuating. Moreover, a support member is formed in each of the second reception parts 83 to support the corresponding spring 90. The support member includes a pair of vertical ribs 83a installed adjacent to both sides of the corresponding spring 90. The vertical ribs 83a are clearly shown in FIG. 5. A pair of the vertical ribs 83a support both sides of the corresponding spring 90 to prevent the fluctuation of the spring 90. Preferably, the support member further includes a horizontal rib 83b installed under the corresponding spring 90. Specifically, the horizontal rib 83b is formed in the corresponding second reception part 83 to lie between a pair of the vertical ribs 83a and supports a corresponding lower side of the corresponding spring 90 to lift horizontally. Hence, the support member 83a and 83b supports both lateral sides and the corresponding lower side of the corresponding spring 90 to determine an installation location of the corresponding spring 90. Namely, the support member 83a and 83b substantially establishes a reception part for partially holding the corresponding spring 90 stably. Furthermore, as mentioned in the foregoing description, the support member 83a and 83b prevents the corresponding spring 90 from fluctuating and lifts it to a predetermined height to make a center of the corresponding spring 90 coincide with that of the holder 85. Hence, the springs 90 enable to stably support the holder 85 to operate smoothly.
Each portion of the holder 85 to be brought contact with the hanging portion 73 is formed slant to correspond to the hanging portion 73. Hence, once the hanging portion 73 of the hook 71 is inserted, a gap between the first and second holders 85a and 85b is easily widened by the elastic deformation of the springs 90. And, a hollow portion is formed inside each of the first and second holders 85a and 85b to have one end of the corresponding spring 90 inserted therein.
Referring to FIG. 3 and FIG. 4, a hanging protrusion 86 formed at one side of each of the first and second holders 85a and 85b is held by one corresponding side of the first reception part 82, whereby a predetermined gap is always maintained between the first and second holders 85a and 85b. Hence, the hanging portion 73 of the hook 71 is inserted in the gap to be fixed thereto.
A pair of fixing protrusions 88 protrude from a bottom of the latch cap 87 to hold one ends of the springs 90, respectively. The fixing protrusions 88 fix the springs 90 not to be separated from the second reception parts 83, respectively.
Moreover, the latch cap 87 is provided to leave a predetermined distance from the holder 85. A pair of guide protrusions 89 protruding from the bottom of the latch cap 87 are brought contact with the one corresponding sides of first and second holders 85a and 85b to guide the holder 85 to slide in and out.
An exterior of the latch assembly 80 is explained as follows.
FIG. 6 is a layout of a latch assembly according to the present invention and FIG. 7 is a rear view of a latch assembly according to the present invention.
Referring to FIG. 6, the insertion 81a is formed in the latch body 81 provided on the front side of the latch assembly 80. The hanging portion 73 of the hook 71 is inserted through the insertion hole 81a. Moreover, bolt coupling holes 80b are formed at both ends of the latch body 81. Bolts are screwed in the bolt coupling holes 80b so that the latch body 81 is fixed to the front panel 63 in the vicinity of the opening 52a. 
Referring to FIG. 7, the first reception part 82 and a pair of the second reception parts 83 protrude from a rear side of the latch body 81, and the first and second reception parts 82 and 83 are covered with the latch cap 87. Hence, one side of the front panel 63 where the latch assembly 80 is installed is partially recessed inward to correspond to protruding portions of the first and second reception parts 82 and 83.
An operation of the apparatus for opening/closing the door of the dryer according to the present invention is explained as follows.
First of all, when the door is closed after the laundry has been put in the dryer, the hanging portion 73 of the hook 71 is inserted through the insertion hole 81a of the latch assembly 80. As the hanging portion 73 of the hook 71 is inserted, the holder 85 loaded in the latch assembly 80 moves backward. Namely, as the hanging portion 73 is inserted, the gap between the first and second holders 85a and 85b gets widened.
After the insertion of the hanging portion 73, the first and second holders 85a and 85b return to their original positions by the elasticity of the springs 90 so as to hold to fix the hanging portion 73. Once the door 70 is closed, a drying step of the dryer is executed. Meanwhile, the surface of the hanging portion 73 coming into contact with the holder 85 is rounded. Pulled by a certain force, the hanging portion 73 slides out to be released from the holder 85. Thus, the user pulls the door 70 by the certain force to open.
In opening/closing the door 70, the springs are stably supported by the support members 83a and 83b as well as their centers always coincide with the holder 85, whereby the springs 90 enable the holder 85 to work more smoothly.
Accordingly, the apparatus for opening/closing the door of the dryer according to the present invention has the following advantages or effects.
First of all, the confronting first and second holders hold the hanging portion of the hook having the triangular cross-section. And, the springs are provided to the rear ends of the first and second holders, whereby the door can be easily opened by being pulled with a certain force. Namely, the user just pulls the door with a predetermined force to open the door conveniently. Therefore, the present invention provides the apparatus for opening/closing the door, by which the user can open the door of the dire in progress in order to put in more objects to be dried or to check a drying state of the laundry.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover such modifications and variations, provided they come within the scope of the appended claims and their equivalents.

## Claims

1. A dryer, comprising:
a housing;
a drum rotatably installed in the housing;
a heating apparatus for supplying hot air to the drum;
a door configured to open and close an entrance formed in the housing for putting a laundry item in the drum; and
an apparatus configured to releasably engage the door and the housing, comprising;
a hook provided at one side of the door of the dryer, the hook having a hanging portion at one end;
a latch body provided on the housing in the vicinity of the entrance, wherein the hanging portion is configured to be inserted into the latch body;
a pair of holders positioned in the latch body so as to confront each other, wherein the pair of holders is configured to engage and hold the hanging portion when the door is closed, and to release the hanging portion when the door is opened, and wherein each of the pair of holders is configured to translate longitudinally within the latch body so as to engage or disengage the hanging portion;
a pair of springs provided at a rear of the holders, respectively; and
a pair of support members provided on the latch body, wherein each support member is configured to support a rear portion of one of the springs so that the springs remain stable as the holders move.

2. The dryer as claimed in claim 1, the latch body comprising:
a first reception part receiving the hanging portion; and
a pair of second reception parts provided adjacent to both sides of the first reception part to hold and guide the holders, respectively.

3. The dryer as claimed in claim 2, wherein a pair of passing holes communicating with the second reception parts are formed at both of the sides of the first reception part to let the holders pass through, respectively.

4. The dryer as claimed in claim 2, wherein a recess is formed at one end of each of the second reception parts to support an end of the corresponding spring.

5. The dryer as claimed in claim 2, wherein a protrusion is formed on one side of each of the holders and is configured to be held by an upper end of the first reception part to limit movement of the holders.

6. The dryer as claimed in claim 2, further comprising a latch cap covering the first and second reception parts to prevent separation of the holders and the springs.

7. The dryer as claimed in claim 6, wherein fixing protrusions protrude from a bottom of the latch cap to hold ends of the springs, respectively.

8. The dryer as claimed in claim 6, wherein guide protrusions protrude from a bottom of the latch cap to guide movement of the holders, respectively.

9. The dryer as claimed in claim 6, wherein coupling holes are formed at corners of the latch cap, and wherein bolts are respectively screwed into each of the coupling holes so as to fix the latch cap to the latch body.

10. The dryer as claimed in claim 1, wherein the hanging portion has a triangular cross-section.

11. The dryer as claimed in claim 10, wherein confronting planes of the holders are inclined to correspond to the triangular cross-section of the hanging portion.

12. The dryer as claimed in claim 1, wherein a surface of the hanging portion to be brought into contact with the holders is rounded.

13. The dryer as claimed in claim 12, wherein confronting tips of the holders are rounded.

14. The dryer as claimed in claim 1, wherein a hollow portion is provided at a rear side of each of the holders to have one end of the corresponding spring inserted therein.

15. The dryer as claimed in claim 1, wherein the hook is built as a single body with a fixing plate which is screw-coupled to one side of the door.

16. The dryer as claimed in claim 1, wherein coupling holes are formed at both sides of the latch body, and wherein bolts are respectively screwed into each of the coupling holes so as to fix the latch body to the front panel.

17. The dryer as claimed in claim 1, wherein an insertion hole is formed in the latch body, and wherein the hanging portion is configured to be inserted into the insertion hole.

18. The dryer as claimed in claim 17, wherein the insertion hole comprises an inclined surface which is inclined inward so as to guide the hanging portion.

19. The dryer as claimed in claim 1, wherein the support members establish an installation location of the springs.

20. The dryer as claimed in claim 1, wherein each support member forms a receiving part for holding at least a portion of a corresponding spring.

21. The dryer as claimed in claim 1, wherein each support member prevents a corresponding spring from fluctuating and lifts the rear portion of a corresponding spring to a predetermined height.

22. The dryer as claimed in claim 1, wherein each support member matches a center of a spring to that of the corresponding holder.

23. The dryer as claimed in claim 1, wherein each support member comprises a pair of vertical ribs installed at lateral sides of a spring.

24. The dryer as claimed in claim 23, wherein each support member further comprises a horizontal rib configured to space a rear portion of a spring above a floor of the latch body.

25. The dryer as claimed in claim 23, wherein the pair of vertical ribs extend from the latch body along a longitudinal direction of a respective spring so as to support an outer lateral circumferential surface of the respective spring.

26. The dryer as claimed in claim 1, wherein each support member comprises a horizontal rib installed beneath a spring.

27. The dryer as claimed in claim 26, wherein the horizontal rib of each support member is configured to space a rear portion of a spring above a floor of the latch body.

28. The dryer as claimed in claim 26, wherein the horizontal rib extends from the latch body along a longitudinal direction of a respective spring so as to support an outer lower circumferential surface of the respective spring.

29. A dryer, comprising:
a housing;
a drum rotatably installed in the housing;
a heating apparatus for supplying hot air to the drum;
a door configured to open and close an entrance formed in the housing for putting a laundry item in the drum; and
an apparatus configured to releasably engage the door and the housing, comprising;
a hook provided at one side of the door of the dryer, the hook having a hanging portion at one end;
a latch body provided on the housing in the vicinity of the entrance such that the hanging portion can be inserted into the latch body;
at least one holder provided in the latch body and configured to engage and hold the hanging portion when the door is closed, and to release the hanging portion when the door is opened, wherein the at least one holder is configured to translate longitudinally within the latch body so as to engage or disengage the hanging portion;
at least one bias member provided at a rear of the at least one holder and configured to bias the at least one holder towards a closed position; and
at least one support member provided on the latch body and configured to support a rear portion of a bias member so that the bias member remains stable as the corresponding holder moves.

30. The dryer as claimed in claim 29, wherein each at least one support member is configured to align a bias member with an aperture in a corresponding holder.

31. The dryer as claimed in claim 29, wherein each at least one support member comprises a pair of vertical ribs that are located at sides of a bias member.

32. The dryer as claimed in claim 31, wherein the vertical ribs are integrally formed with the latch body.

33. The dryer as claimed in claim 31, wherein each at least one support member further comprises a horizontal rib which is configured to space a bias member above a floor of the latch body.

34. The dryer as claimed in claim 33, wherein the vertical ribs and the horizontal rib are integrally formed on the latch body.

35. The dryer as claimed in claim 33, wherein the pair of vertical ribs and the horizontal rib extend from the latch body along a longitudinal direction of a respective bias member such that the pair of vertical ribs support an outer lateral circumferential surface of the respective bias member, and the horizontal rib supports an outer lower circumferential surface of the respective spring.

36. The dryer as claimed in claim 29, wherein the at least one holder comprises a pair of holders that confront each other and that move in opposing directions to releasably hold the hanging portion.

37. The dryer as claimed in claim 29, wherein each at least one support member comprises a horizontal rib which is configured to space a bias member above a floor of the latch body.