Door handle structure

Abstract

To provide a door handle structure that can be decreased in number of components which are visible from outside when not operated, and also enables a door to be easily lifted and opened even when a height of projection of the handle from a surface of the door is suppressed small and facilitates improvement in designability without sacrificing operability.SOLUTION: A door handle structure comprises a pedestal 10, a grip 30 and a joint member 40. The pedestal 10 is plate-like and fixed to a door 1. The grip 30 has a surface plate part 31 and a long plate-like peripheral plate part 32. The joint member 40 joins the grip 30 to the pedestal 10 tiltably between a normal state and a tilt state. In the normal state, the surface plate part 31 is substantially parallel with a surface 1a of the door 1. In the tilt state, the surface plate part 31 tilts at a predetermined angle to the surface 1a of the door 1 to form a gap in which a finger is put between a tilt tip 31c of the surface plate part 31 and the pedestal 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a door handle structure, particularly to a door handle structure suitable for use with doors that are used by specific people rather than by an unspecified number of people, such as fire doors or doors for pipe shafts or electrical equipment rooms. [Background technology]

[0002] Patent Document 1 describes a door handle structure for a fire door that is formed from a case handle. The door handle structure described in Patent Document 1 includes a semicircular handle and a handle case. The handle is rotatable to operate the latch bolt and is also rotatable around a rotation axis parallel to the surface of the door. When not in operation, the handle is rotated so that it is entirely housed in the handle case, and when the door is opened, it is rotated so that it stands perpendicular to the surface of the door. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-169907 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the door handle structure described in Patent Document 1, at least three mechanisms - the handle, the support mechanism that rotatably and pivotably supports the handle, and the handle case that houses the handle - are visible from the outside, and although it is functional, the large number of parts that are visible from the outside and the complex structure of the support mechanism can be obstacles when pursuing a simple design.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a door handle structure that can reduce the number of parts visible from the outside when not in operation, can easily pull open the door even when the handle protrudes only a small height from the surface of the door, and can easily improve design without sacrificing operability. [Means for solving the problem]

[0006] The door handle structure disclosed herein comprises a base, a handle, and a connecting member. The base is plate-shaped and fixed to the door. The handle has a surface plate portion and a long, plate-shaped peripheral plate portion. The surface plate portion is disposed at a predetermined distance from the surface of the door so as to cover the base. The peripheral plate portion is erected from the peripheral edge of the surface plate portion toward the door so as to surround the base. The connecting member is disposed between the surface plate portion and the base and connects the handle to the base so as to be tiltable between a normal state and an inclined state. The normal state is a state in which the surface plate portion is approximately parallel to the surface of the door. The inclined state is a state in which the surface plate portion is inclined at a predetermined angle with respect to the surface of the door, forming a gap between the tilted tip of the surface plate portion and the base so as to allow a finger to be inserted.

[0007] The door handle structure disclosed herein further includes a rotating body. The rotating body is rotatably supported on the base. The connecting member connects the handle to the base via the rotating body so that the handle can tilt and so that the rotating body can be rotated.

[0008] The door handle structure disclosed herein further includes a biasing means for biasing the handle to the normal state. [Effects of the Invention]

[0009] According to the door handle structure of the present invention, the number of parts visible from the outside can be reduced when not in operation, and the door can be easily pulled open even when the handle protrudes only a small height from the surface of the door, making it easy to improve design without sacrificing operability. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an external perspective view showing a door handle structure according to an embodiment of the present invention; [Figure 2] 1 is an exploded perspective view showing a door handle structure according to an embodiment of the present invention; [Figure 3] 1 is a cross-sectional view showing a door handle structure according to an embodiment of the present invention. [Figure 4] 4(a) is a front view showing the base of the embodiment, and FIG. 4(b) is a cross-sectional view taken along line AA of FIG. [Figure 5] 1A is a front view showing a rotating body of an embodiment, FIG. 1B is a plan view showing a rotating body of an embodiment, and FIG. 1C is a side view showing a rotating body of an embodiment. [Figure 6] 6(a) is a rear view showing the handle of the embodiment, (b) is a side view showing the handle of the embodiment, and (c) is a cross-sectional view taken along line BB in FIG. 6(a). [Figure 7] 7(a) is a front view showing the joining member of the embodiment, (b) is a cross-sectional view taken along line CC in FIG. 7(a), and (c) is a side view showing the joining member of the embodiment. [Figure 8] 8(a) is a front view showing the door handle structure according to the embodiment of the present invention, (b) is a cross-sectional view taken along line DD in FIG. 8(a), and (c) is a cross-sectional view taken along line DD in FIG. 8(a) when the handle is in an inclined state. [Figure 9] 9(a) is a rear view showing the handle of another embodiment, (b) is a side view showing the handle of another embodiment, and (c) is a cross-sectional view taken along line EE in FIG. 9(a). DETAILED DESCRIPTION OF THE INVENTION

[0011] The door handle according to the embodiment of the present invention will be described in detail below with reference to the drawings. Note that the embodiment described below is a preferred example for carrying out the present invention, and therefore various technical limitations are imposed. However, the present invention is not limited to this embodiment unless otherwise specified in the following description to the effect that the invention is limited.

[0012] <Embodiment> A door handle structure according to an embodiment of the present invention will be described below with reference to Fig. 1 to Fig. 3. Fig. 1 is an external perspective view showing the door handle structure according to the embodiment. Fig. 2 is an exploded perspective view showing the door handle structure according to the embodiment. Fig. 3 is a cross-sectional view showing the door handle structure according to the embodiment.

[0013] 1 to 3, the door handle structure according to the embodiment includes a pair of bases 10, a pair of rotating bodies 20, a pair of handles 30, and a pair of connecting members 40, which are installed on both sides of a hinged door 1. The pair of handles 30 have a flat shape so that the door handle structure according to the embodiment can be suitably installed on a fire door, a pipe shaft, an electrical equipment room door, or the like. The pair of handles 30 are tiltable so that they are inclined at a predetermined angle relative to the surface 1a of the door 1 when the door 1 is pulled open, and in the embodiment, a gap LG is formed below the pair of handles 30 so that the fingertips can be inserted.

[0014] The door handle structure of the embodiment further includes a square core 50 and at least one connecting shaft, that is, a pair of connecting shafts 60. The square core 50 connects the handles 30 installed on both sides of the door 1. The pair of connecting shafts 60 are hexagonal pipe-shaped and have female threads 61 on both ends, which connect the pair of bases 10 arranged on both sides of the door 1 to each other and fix each base 10 to the door 1.

[0015] The base of the embodiment will be described below with reference to Fig. 4. Fig. 4(a) is a front view showing the base of the embodiment, and Fig. 4(b) is a cross-sectional view taken along line AA of Fig. 4(a).

[0016] The base 10 in this embodiment is in the shape of a circular plate, and is fixed to the door 1 so as to be in contact with the surface 1a of the door 1 or so as to be in contact with a case of a locking device (not shown) that is fixed to the door 1. In this embodiment, the base 10 has a center hole 11, a pair of connecting screw insertion holes 12, and a through hole 13 that penetrate the base 10 in the thickness direction.

[0017] The center hole 11 is circular, and a rotating body 20 is attached to it. Connecting screws 12a (shown in FIG. 2) are inserted into the pair of connecting screw insertion holes 12 from the surfaces of the pair of bases 10 opposite the door 1. The connecting screws 12a are axial fasteners that threadably engage with the female threads 61 of the connecting shaft 60 from the surfaces of the pair of bases 10 opposite the door 1, via the pair of connecting screw insertion holes 12, thereby connecting the pair of bases 10 to both ends of the connecting shaft 60. As shown in FIG. 4, the through hole 13 is an elongated hole that extends in an arc shape along the outer periphery of the base 10. As will be described in detail later, the peripheral wall portion of the through hole 13 is an engaged portion that engages with the locking screw 13a, and is formed in the pair of bases 10 to enhance the anti-theft performance of the door handle structure.

[0018] Next, the rotating body of the embodiment will be described with reference to Fig. 5. Fig. 5(a) is a front view showing the rotating body of the embodiment. Fig. 5(b) is a plan view showing the rotating body of the embodiment. Fig. 5(c) is a side view showing the rotating body of the embodiment.

[0019] The rotating body 20 of the embodiment has a cylindrical shaft portion 21 and a head portion 22 provided at one end of the shaft portion 21, and is connected to the latch bolt 2 via a square core 50 so as to be able to drive the latch bolt 2 forward and backward. The rotating body 20 is supported on the base 10 in a center hole 11 of the base 10 so as to be able to rotate forward and backward.

[0020] The shaft portion 21 of the rotating body 20 has a fitting hole 21a and an outer circumferential groove portion 21b, and is inserted into the center hole 11 of the base 10. As shown in FIGS. 2 and 3 , a ring 23 and a spacer 24 are fitted to the exterior of the shaft portion 21. The ring 23 is interposed between the head 22 of the rotating body 20, the spacer 24, and the base 10. The spacer 24 is a cylindrical body made of resin, and has a flange portion 24a at one end. The spacer 24 functions as a bearing for supporting the shaft portion 21 in the center hole 11 of the base 10.

[0021] 5, the fitting hole 21a opens at the tip end surface, which is the end surface of the shaft portion 21 opposite to the head 22, and is fitted with the square core 50. By fitting the square core 50 into the fitting hole 21a, the rotating body 20 rotates integrally with the square core 50.

[0022] The outer circumferential groove 21b is provided around the outer circumferential surface of the shaft portion 21 in a position close to the tip end surface of the shaft portion 21. A C-shaped retaining ring 25 shown in Figures 2 and 3 is fitted into the outer circumferential groove 21b, and the C-shaped retaining ring 25 holds the spacer 24 and the ring 23 on the shaft portion 21.

[0023] The head 22 of the rotor 20 is a circular plate-like member having a larger diameter than the shaft 21, and has a pair of fitting grooves 22a on its outer periphery. The pair of fitting grooves 22a are arranged opposite each other with the central axis of the shaft 21 therebetween, with their bottoms facing radially inward of the head 22 and their openings facing radially outward of the head 22, and are formed to extend parallel to each other at positions equidistant from the central axis of the shaft 21 and in a direction perpendicular to the central axis (rotation axis I0) of the shaft 21.

[0024] Next, the handle of the embodiment will be described with reference to Fig. 6. Fig. 6(a) is a rear view showing the handle of the embodiment. Fig. 6(b) is a side view showing the handle of the embodiment. Fig. 6(c) is a cross-sectional view taken along line BB in Fig. 6(a). The handle 30 of the embodiment has a surface plate portion 31 and a long plate-shaped peripheral plate portion 32, and is rotatably connected to the rotating body 20.

[0025] The surface panel portion 31 is disposed at a predetermined distance from the surface 1a of the door 1 so as to cover the base 10. In this embodiment, the surface panel portion 31 is substantially square, and is disposed so as to overlap the entire base 10 in a direction perpendicular to the surface 1a of the door 1.

[0026] The peripheral plate portion 32 is a portion to which force is applied by fingers when rotating the handle 30, and is erected from the peripheral edge of the front plate portion 31 toward the door 1 so as to surround the base 10. In this embodiment, as shown in FIG. 3 , the peripheral plate portion 32 surrounds the base 10 such that the tip portion, which is the end portion facing the door 1, faces a portion of the outer circumferential surface of the base 10.

[0027] Also, as shown in FIG. 6, in this embodiment, the handle 30 has a pair of connecting protrusions 31a, a pair of joining screw holes 31b, a pair of lateral notches 32a, a lower notch 32b, a partition wall portion 33, and a pair of positioning protrusions 34.

[0028] The pair of connecting protrusions 31a are cylindrical and protrude from the back surface of the front panel portion 31, which is the surface facing the door 1, toward the door 1, above the center of the handle 30 in the vertical direction. The pair of connecting protrusions 31a are loosely fitted into a pair of protrusion loose-fitting holes 43 described below, and connect the handle 30 to the joining member 40 in a tiltable manner.

[0029] The handle 30 is tiltably connected to the connecting member 40 above the center of the handle 30 in the vertical direction, so that the lower end of the handle 30 has a larger range of motion than the upper end. Therefore, in this embodiment, the lower end of the surface panel portion 31 is the tilting tip 31c.

[0030] The pair of joining screw holes 31b are formed on the tip surfaces of the pair of connecting protrusions 31a in the protruding direction. Joining screws 43a shown in FIG. 2 are screwed into the pair of joining screw holes 31b.

[0031] The pair of lateral notches 32a are formed on both sides of the handle 30 by cutting out the peripheral plate portion 32, for example, in a semicircular shape, so that the peripheral plate portion 32 does not overlap with the fixing screw holes 42 described below when the handle 30 is in the tilted state shown by the virtual lines in Figure 6(b).

[0032] The lower cutout 32b is formed in the lower part of the handle 30 by cutting out the peripheral plate 32 in, for example, a square shape so that when the handle 30 is tilted, the fingertips can be easily inserted into the back side of the surface plate 31. By making the lower end of the surface plate 31 the tilting tip 31c, the lower cutout 32b for inserting the fingertips can be formed in the lower part of the handle 30, making it difficult to see the internal structure of the door handle structure from the outside and facilitating an improvement in design.

[0033] The partition wall 33 is erected on the rear surface of the surface plate 31 and defines a space on the rear surface side of the surface plate 31 in which the joining member 40 is disposed.

[0034] The pair of positioning protrusions 34 protrude from the back surface of the front panel 31 toward the door 1, below the center of the handle 30 in the vertical direction. The pair of positioning protrusions 34 are positioning means, and in this embodiment, have a conical shape whose diameter decreases toward the tip in the protruding direction. The pair of positioning protrusions 34 abut against the connecting member 40 at a position near the tilting tip 31c of the front panel 31, thereby positioning the handle 30 so that it does not tilt in the rotation direction around the rotation axis I0 of the rotating body 20 when not in operation.

[0035] Next, a joining member according to an embodiment will be described with reference to Figures 7 and 8. Figure 7(a) is a front view showing the joining member according to an embodiment. Figure 7(b) is a cross-sectional view taken along line CC in Figure 7(a). Figure 7(c) is a side view showing the joining member according to an embodiment. Figure 8(a) is a front view showing the door handle structure according to an embodiment. Figure 8(b) is a cross-sectional view taken along line DD in Figure 8(a). Figure 8(c) is a cross-sectional view taken along line DD in Figure 8(a) when the handle is in an inclined state.

[0036] 7, the connecting member 40 is plate-shaped and has an overall shape resembling a horseshoe shape formed by cutting out the inner portion of a circular plate. The connecting member 40 has a pair of arms 40a extending parallel to one another and an intermediate portion 40b connecting the pair of arms 40a at the base end. The connecting member 40 is disposed between the surface plate portion 31 of the handle 30 and the base 10, and is adjacent to the base 10 in the direction along the rotation axis I0 of the rotating body 20. The connecting member 40 connects the handle 30 to the base 10 via the rotating body 20 so that the handle 30 can tilt between a normal state and an inclined state. The connecting member 40 also connects the handle 30 to the rotating body 20 so that the rotating body 20 can be rotated.

[0037] The normal state is a state of the handle 30 in which the surface panel portion 31 is approximately parallel to the surface 1a of the door 1, as shown by the solid line in Figure 3. "Approximately parallel" means a state in which the surface panel portion 31 appears to the human eye to be not tilted relative to the surface 1a of the door 1, and although there are no particular limitations, as a rough guide, it is a state in which the tilt of the surface panel portion 31 relative to the surface 1a of the door 1 is less than 10 degrees, for example.

[0038] The tilted state is a state in which, as shown by the imaginary line in Figure 3, the surface panel 31 is tilted at a predetermined angle with respect to the surface 1a of the door 1, and a gap LG large enough to fit a finger is formed between the tilting tip 31c of the surface panel 31 and the base 10. However, the predetermined angle is not particularly limited as long as it allows at least a fingertip to be inserted between the tilting tip of the surface panel 31 and the base 10 and allows easy application of force to pull the handle 30 toward you, but is preferably 10 degrees or more and 30 degrees or less, and more preferably 10 degrees or more and 20 degrees or less.

[0039] 7, the joining member 40 has an outer peripheral surface 40d, a pair of fitting protrusions 41, a pair of fixing screw holes 42, a pair of protrusion loose-fitting holes 43, a pair of spring accommodating recesses 44, locking screw holes 45, and a pair of cover portions 46. The outer peripheral surface 40d of the joining member 40 is the surface that faces the peripheral plate portion 31 of the handle 30 when the handle 30 is in the normal state.

[0040] The pair of fitting protrusions 41 are protrusions formed on the opposing surfaces of the pair of arm portions 40a so as to extend along the longitudinal direction of the pair of arm portions 40a, and are slidably fitted into the pair of fitting grooves 22a of the rotating body 20. By slidably fitting the pair of fitting protrusions 41 into the pair of fitting grooves 22a, the joining member 40 is connected to the rotating body 20 so as to be able to rotate the rotating body 20, and is attached to the rotating body 20 so as to be slidable in a direction intersecting the rotation axis 10 of the rotating body 20. Note that when the pair of fitting protrusions 41 are slidably fitted into the pair of fitting grooves 22a, the sliding direction of the joining member 40 is a direction perpendicular to the rotation axis 10 of the rotating body 20 in this embodiment, that is, a direction from top to bottom in FIG. 8(a).

[0041] The pair of fixing screw holes 42 are insertion holes through which the fixing screws 42a shown in Fig. 2 can be inserted, and have one end openings on the outer peripheral surface 40d and other end openings on the opposing surfaces of the pair of arm portions 40a. In addition, at the other end openings of the pair of fixing screw holes 42, the pair of fitting protrusions 41 are each separated.

[0042] In this embodiment, the pair of fixing screw holes 42 are female threaded holes that are threaded with fixing screws 42a and penetrate each arm portion 40a along an orthogonal line 42b. The orthogonal line 42b is a straight line that is orthogonal to the central axis of the imaginary circle 40c and extends in a direction perpendicular to the longitudinal direction of the pair of arm portions 40a. The imaginary circle 40c complements the cutout portion that gives the joining member 40 a horseshoe shape, and is an imaginary shape when the outer periphery of the joining member 40 is considered to be a perfect circle.

[0043] In this embodiment, the fixing screw 42a is a shaft-shaped fixing member formed from a recessed hexagonal set screw, and can be loosened or tightened via one-end openings of the fixing screw holes 42, fixing the joining member 40 to the rotating body 20. As shown in Figure 6(b), one-end openings of the fixing screw holes 42 on the outer circumferential surface 40d are covered by the peripheral plate portion 32 when the handle 30 is in the normal state, and are in an inoperable state where the fixing screws 42a cannot be operated via the one-end opening, and are not covered by the peripheral plate portion 32 when the handle 30 is in the tilted state, and are in an operable state where the fixing screws 42a can be operated.

[0044] 7, the pair of protrusion loose-fitting holes 43 are circular holes that open above the center of the joining member 40 in the vertical direction on the surface of the joining member 40 opposite the door 1 (front surface), and are provided at positions corresponding to the pair of connecting protrusions 31a of the handle 30. The pair of spring storage recesses 44 are cylindrical recesses that are provided coaxially so as to communicate with the pair of protrusion loose-fitting holes 43, and open on the surface of the joining member 40 facing the door 1 (rear surface).

[0045] As shown in FIG. 8 , a pair of connecting protrusions 31 a of the handle 30 are loosely fitted into the pair of protrusion loose-fitting holes 43 to allow tilting of the handle 30. The pair of connecting protrusions 31 a protrude into the pair of spring storage recesses 44 through the pair of protrusion loose-fitting holes 43, and springs 44 a, such as conical coil springs, are fitted on the pair of connecting protrusions 31 a. Joining screws 43 a are threadedly engaged with the pair of joining screw holes 31 b, and ring-shaped spring retainers 43 b are fixed to the tips of the pair of connecting protrusions 31 a. This prevents the pair of connecting protrusions 31 a from falling out of the pair of protrusion loose-fitting holes 43. The handle 30 is connected to the joining member 40 so as to be tiltable by a predetermined angle relative to the base 10 and the rotating body 20. The springs 44 a are disposed in a compressed state between the spring retainers 43 b and the bottoms of the pair of spring storage recesses 44, and function as biasing means that biases the handle 30 to its normal state.

[0046] 7, the locking screw hole 45 is formed on the surface of the joining member 10 facing the door 1, and overlaps with the through hole 13 of the base 10 in the direction along the rotation axis I0 of the rotating body 20. The locking screw hole 45 is an attachment portion into which a locking screw 13a, which is a locking member, is threaded and attached through the through hole 13. In this embodiment, the locking screw 13a is formed from a commercially available pan head screw or the like, and has a male thread portion that threads into the locking screw hole 45 and a head, with the head protruding into the through hole 13 when threaded into the locking screw hole 45. The head of the locking screw 13a is an engaging portion that engages with an engaged portion of one of the pair of bases 10.

[0047] The covering portion 46 covers the connecting screw 12a, which serves as a fastener, on the surface of the pair of bases 10 opposite the door 1. As shown in Fig. 7 , in the embodiment, the covering portion 46 is the portion of the pair of arm portions 40a of the joining member 10 that faces the connecting screw 12a. Because the covering portion 46 covers the connecting screw 12a on the surface of the pair of bases 10 opposite the door 1, the connecting screw 12a cannot be loosened with a screwdriver or the like unless the joining member 10 is removed from the rotating body 20, and the base 10 cannot be removed from the connecting shaft 60.

[0048] The installation procedure for the door handle structure according to the embodiment will be described below with reference to Figure 2. The installation of the door handle structure is generally performed in the following order, but steps 1 to 3 can be performed in any order, step 7 can be performed before step 8, and step 9 can be performed before step 10. The door handle structure can be removed in the reverse order of the installation procedure.

[0049] First step: The base 10, which is installed on the outside of the room, is connected to one end of each of the pair of connecting shafts 60 using the connecting screws 12a.

[0050] Step 2: Fit ring 23 onto shaft 21 of rotating body 20, pass shaft 21 through center hole 11 of base 10 installed on the outside of the room, fit spacer 24 onto the tip of shaft 21, and fit C-shaped retaining ring 25 into outer peripheral groove 21b, thereby attaching rotating body 20 installed on the outside of the room to base 10 installed on the outside of the room.

[0051] Third step: The connecting protrusion 31a of the handle 30 is loosely fitted into the protrusion loose fitting hole 43 of the connecting member 40 installed on the outside of the room, the spring 44a is fitted onto the connecting protrusion 31a inside the spring storage recess 44, and with the spring 44a compressed by the spring retainer 43b, the connecting screw 43a is screwed into the connecting screw hole 31b, and the handle 30 installed on the outside of the room is connected to the connecting member 40 installed on the outside of the room in a tiltable manner.

[0052] Step 4: The connecting member 40 is attached to the rotating body 20 by sliding it from the top of Figure 2 so that the mating protrusion 41 fits into the mating groove 22a, and while holding the handle 30 in an inclined position, the connecting member 40 is fixed to the rotating body 20 with the fixing screw 42a, thereby attaching the connecting member 40 installed on the outside of the room to the rotating body 20 installed on the outside of the room.

[0053] Step 5: In the connecting member 40 installed on the outside of the room, the locking screw 13a is screwed into the locking screw hole 45 of the connecting member 40 through the through hole 13 of the base 10, so that the head of the locking screw 13a protrudes inside the through hole 13.

[0054] Sixth step: The assembly assembled by the above-mentioned first to fifth steps is attached to the door 1 from the outside of the room, and the square core 50 is fitted into the fitting hole 21a of the rotating body 20 installed on the outside of the room.

[0055] Seventh step: In the same manner as the second step, the rotating body 20 to be installed inside the room is attached to the base 10 to be installed inside the room.

[0056] Eighth step: The base 10 installed on the inside of the room is connected to the other ends of the pair of connecting shafts 60 from the inside of the room using the connecting screws 12a.

[0057] Ninth step: In the same manner as the third step, the handle 30 installed on the interior side of the room is connected to the connecting member 40 installed on the interior side of the room.

[0058] Step 10: Using the same procedure as Step 4 above, the joining member 40 installed on the inside of the room is attached to the rotating body 20 installed on the inside of the room, completing the attachment of the door handle structure of the embodiment to the door 1.

[0059] As explained above with reference to Figures 1 to 8, according to the door handle structure of the embodiment, the handle 30 has a surface panel portion 31 and a peripheral panel portion 32, the surface panel portion 31 is positioned at a predetermined distance from the surface 1a of the door 1 so as to cover the base 10, the peripheral panel portion 32 is erected from the peripheral edge of the surface panel portion 31 in the direction of the door 1 so as to surround the base 10, and the joining member 40 arranged between the surface panel portion 31 and the base 10 joins the handle 30 to the base 10 so as to be tiltable between a normal state and an inclined state.

[0060] Therefore, the door handle structure can be installed on the door 1 so that essentially only the handle 30 is visible when not in operation, reducing the number of parts visible from the outside. Also, by tilting the handle 30 and forming a gap LG, for example below the handle 30, that allows at least the fingertip to fit in, the door 1 can be easily pulled open even when the height that the handle 30 protrudes from the surface 1a of the door 1 is kept small, making it easy to improve the design without sacrificing operability.

[0061] For example, in a prototype of the door handle structure according to the embodiment, the maximum protruding height of the handle 30 from the surface 1a of the door 1 when not in operation is in the range of 1.0 cm to 1.2 cm, which is not significantly different from the maximum protruding height of a typical case handle, making it even easier to improve the design.

[0062] 1 to 8, in the door handle structure according to the embodiment, the joining member 40 joins the handle 30 to the base 10 via the rotating body 20 so that the handle 30 can tilt, and also joins the handle 30 to the rotating body 20 so that the rotating body 20 can be rotated. Therefore, not only can the door 1 be pulled open, but also a rotation operation to operate the latch bolt 2 is possible. Even if the protruding height of the handle 30 is reduced to a maximum protruding height that is not significantly different from that of a typical case handle, by, for example, tilting the handle 30, it is possible to easily apply force when rotating the handle 30, and this facilitates improving the design without sacrificing operability.

[0063] Furthermore, by making the shape of the surface plate portion 31 rectangular or polygonal as in the above embodiment, it becomes easier to apply force to the peripheral plate portion 32 of the handle 30 without having to tilt the handle 30, and it is also possible to easily improve the design without sacrificing operability.

[0064] 1 to 8, in the door handle structure according to the embodiment, the spring 44a biases the handle 30 to the normal state. Therefore, the handle 30 is maintained in the normal state not only by gravity but also by the elastic force of the spring 44a. Therefore, if the handle 30 is made of metal, the handle 30 will vibrate when the door 1 is opened or closed, and noises such as rattles caused by collisions with other components can be prevented. This prevents the luxurious appearance from being audibly impaired, and makes it easier to improve the design.

[0065] 1 to 8, in the door handle structure according to this embodiment, the fixing screw holes 42 have one-end openings on the outer peripheral surface 40d of the joining member 40, and the outer peripheral surface 40d of the joining member 40 faces the peripheral plate portion 32 of the handle 30. When the handle 30 is in the normal position, the one-end openings of the fixing screw holes 42 are at least partially covered by the peripheral plate portion 32, and the fixing screw holes 42 are in an inoperable state where they cannot be operated. When the handle 30 is in the tilted position, the one-end openings of the fixing screw holes 42 are not covered by the peripheral plate portion 32, and the fixing screw holes 42 are in an operable state where the fixing screws 42a can be operated.

[0066] As described above, with the door handle structure according to the embodiment, when the handle 30 is in the normal state, the opening at one end of the fixing screw hole 42 is covered by the peripheral plate portion 32, and when the door handle is not being operated, the fixing screw hole 42 is not easily visible from the outside, making it easier to improve the appearance and further improve the design. In addition, the existence of the fixing screw 42a is also difficult to notice, and the fixing screw 42a cannot be loosened in the normal state, improving security.

[0067] Conversely, when the handle 30 is in the tilted state, the opening at one end of the fixing screw hole 42 is not covered by the peripheral plate portion 32, and the fixing screw hole 42 is in an operable state in which the fixing screw 42a can be operated. Therefore, by operating the handle in the usual way to open the door 1, the fixing screw 42a is in an operable state in which it can be loosened or tightened, making it easy to attach and remove the door handle structure.

[0068] Another method for enabling the fixing screws 42a to be loosened or tightened by operating the handle as usual to open the door 1 is to shift the positions of the pair of side notches 32b in the handle 30 up or down, thereby increasing the depth of the pair of side notches 32b.

[0069] If the positions of the pair of side notches 32b are shifted up or down and the notch depth of the pair of side notches 32b is made greater, for example, when the handle 30 is rotated clockwise, one of the side notches 32b will overlap with one end opening of one of the fixing screw holes 42, allowing one of the fixing screws 42a to be operated, and when the handle 30 is rotated counterclockwise, the other side notch 32b will overlap with one end opening of the other fixing screw hole 42, allowing the other fixing screw 42a to be operated, allowing both fixing screws 42a to be loosened or tightened.

[0070] However, the locking mechanism of a door handle structure having a latch bolt is often designed so that the handle can only be rotated in one direction from the non-operated state, and if the handle can only be rotated in one direction from the non-operated state, it is not possible to make both of the pair of fixing screws 42a operable by shifting the positions of the pair of lateral notches 32b up or down.

[0071] According to the door handle structure of the embodiment, when the handle 30 is in an inclined state, neither of the openings at one end of the pair of fixing screw holes 42 is covered by the peripheral plate portion 32, and both of the pair of fixing screw holes 42 are in an operable state where the fixing screws 42a can be operated. Therefore, even in a locking mechanism in which the handle 30 can only be rotated in one direction from the non-operated state, both of the pair of fixing screws 42a can be loosened or tightened, which expands the range of models to which the locking device can be applied.

[0072] It is also possible to shift one side notch 32b upward and the other downward, but this would result in asymmetry and would be undesirable from a design perspective, and the door handle structure of the embodiment makes it easier to further improve the design.

[0073] 1 to 8, in the door handle structure according to the embodiment, the base 10 has the through hole 13, the plate-shaped connecting member 40 has the locking screw hole 45 on the surface facing the door 1, and for example, a locking screw 13a is threaded into the locking screw hole 45 of the connecting member 40 installed on the outside of a room, and the base 10 is fixed to the door 1 with the head of the locking screw 13a protruding into the through hole 13. In addition, as shown in FIG. 8(a), the head of the connecting screw 12a for fixing the base 10 to the door 1 overlaps with the connecting member 40, and the connecting screw 12a cannot be loosened with a screwdriver or the like unless the connecting member 40 is removed from the rotating body 20. Therefore, the base 10 cannot be removed from the door 1 from the outside of the room, and the door handle structure cannot be disassembled.

[0074] In this embodiment, to remove the connecting member 40 from the rotating body 20, it is necessary to loosen the fixing screw 42a and then slide the connecting member 40 in a direction intersecting the rotation axis 10 of the rotating body 20. The connecting member 40 is disposed so as to contact the surface of the base 10. When the connecting member 40 slides along the surface of the base 10 in a direction intersecting the rotation axis 10 of the rotating body 20, the head of the locking screw 13a protruding into the through hole 13 engages with the peripheral wall surface of the through hole 13, preventing the connecting member 40 from sliding. As a result, the connecting member 40 cannot be removed from the rotating body 20, and the connecting screw 12a cannot be loosened with a screwdriver or the like, making it impossible to disassemble the door handle structure. Therefore, the door handle structure of this embodiment improves security.

[0075] On the other hand, for example, on the inside of a room, by not attaching locking screw 13a to connecting member 40, loosening fixing screw 42a allows connecting member 40 to slide along the surface of base 10 in a direction intersecting the axial direction of rotating body 20, making it easy to disassemble the door handle structure. Therefore, even if the same parts such as base 10, rotating body 20, handle 30, and connecting member 40 are used on the outside and inside of a room, simply attaching a single locking screw 13a, such as a commercially available pan head screw, to the outside of the room makes it impossible to disassemble the door handle structure from the outside of the room, thereby improving security without increasing the number of parts in the door handle structure to be manufactured and without increasing manufacturing costs.

[0076] Furthermore, according to the door handle structure of the embodiment, at least one connecting shaft 60 connects the pair of bases 10 to each other and fixes them to the door 1. Therefore, by changing the length of the connecting shaft 60, the door handle structure can be installed on doors of various thicknesses.

[0077] As described above, the connecting screws 12a, which are axial fasteners, connect the pair of bases 10 to both ends of the connecting shaft 60 from the surfaces of the pair of bases 10 opposite the door 1, the pair of joining members 40 are adjacent to the bases 10 in a direction along the rotation axis I0 of the rotating body 20 and are attached to the rotating body 20 so as to be slidable in a direction intersecting the rotation axis I0 of the rotating body 20, and the cover portion 46 covers the connecting screws 12a on the surfaces of the pair of bases 10 opposite the door 1.

[0078] A locking screw hole 45 is provided on the surface of the pair of connecting members 40 facing the door 1, and for example, in the connecting member 40 on the outside side of the room, a locking screw 13a, which is a locking member, is attached to the locking screw hole 45 and engages with the engaged portion of the base 10 arranged on the outside side of the room, thereby locking the connecting member 40 so that it cannot slide.

[0079] Therefore, for example, on the outside of a room, even if the fixing screw 42a is loosened, the joining member 40 cannot be removed from the rotating body 20, the connecting screw 12a cannot be loosened with a screwdriver or the like, the base 10 cannot be removed from the pair of connecting shafts 60, and the handle 30 cannot be removed from the door 1, making it difficult to disable the lock and improving security. Also, by using the same parts for the base 10, rotating body 20, handle 30, and joining member 40 on both the inside and outside of a room and, for example, fitting the locking screw 13a into the locking screw hole 45 only on the outside of the room, it is possible to prevent the joining member 40 from being removed from the rotating body 20 as described above, and there is no need to manufacture two different parts with the same function, one for the inside and one for the outside of a room, thereby improving security while avoiding an increase in the number of parts to be manufactured.

[0080] 1 to 8, in the door handle structure according to the embodiment, the engaged portions of the pair of pedestals 10 are formed from the peripheral wall portions of the through-holes 13, the locking screw holes 45 overlap with the through-holes 13 in the direction along the rotation axis I0 of the rotating body 20, and the locking screws 13a are inserted into the locking screw holes 45 in one of the pair of pedestals 10 through the through-holes 13. Therefore, the peripheral wall portions of the through-holes 13 surround the locking screws 13a as locking members so that they cannot be seen from the outside, making it more difficult to remove the locking screws 13a, for example, from the outside of a room, further improving security.

[0081] 1 to 8, in the door handle structure according to the embodiment, locking screw hole 45, which serves as an attachment portion for the locking member, is formed of a female thread, and locking screw 13a, which serves as a locking member, has a male thread portion that screws into locking screw hole 45 and a head portion that serves as an engaging portion that engages with the engaged portion of base 10. Therefore, for example, a commercially available pan head screw can be used as locking screw 13a, and furthermore, the security can be improved while avoiding an increase in the number of parts to be manufactured.

[0082] 1 to 8, the door handle structure according to the embodiment can be designed so that the handle 30 is essentially the only part visible from the outside when not in operation. The entire handle 30 can be tilted relative to the surface 1a of the door 1 to open the door 1, so the door handle structure can be designed so that the boundary between the movable and fixed parts is not visible from the outside. For example, if the upper half of the surface panel 31 is the fixed part and the lower half is the movable part, a boundary between the movable and fixed parts will be visible on the surface panel 31. However, according to the door handle structure according to the embodiment, the surface panel 31 can be formed from a single plate material, which allows the door handle structure to have an extremely simple design and facilitates further improvements in design.

[0083] 1 to 8, in the door handle structure according to the embodiment, the positioning protrusion 34, which serves as a positioning means, protrudes toward the door 1 from the surface of the front panel 31 facing the door 1. As shown in FIG. 8(a), when the handle 30 is in its normal state, the positioning protrusion 34 abuts against the joining member 40, positioning the handle 30 at a fixed position in the normal state. Therefore, even if the handle 30 has a square shape as in the embodiment and tilting of the handle 30 in the rotational direction is noticeable to people, the handle 30 can be positioned so that it does not tilt in the rotational direction, further facilitating improved design. Furthermore, by forming the positioning protrusion 34 into a conical shape whose diameter decreases toward the tip in the protruding direction, tilting of the handle 30 in the rotational direction can be more reliably eliminated, further facilitating improved design.

[0084] Next, another embodiment of the present invention will be described with reference to Fig. 9. Fig. 9(a) is a rear view showing a handle of the other embodiment. Fig. 9(b) is a side view showing a handle of the other embodiment. Fig. 9(c) is a cross-sectional view taken along line EE of Fig. 9(a).

[0085] In the above-described embodiment, the shape of the surface plate portion 31 of the handle 30 was substantially square, whereas the shape of the surface plate portion 31A of the handle 30A of this embodiment is substantially circular. Also, while the handle 30 of the above-described embodiment had a partition wall portion 33 that partitioned the storage space for the joining member 40, the handle 30A of this embodiment does not have a partition wall portion, and the entire space surrounded by the peripheral plate portion 32A becomes the storage space for the joining member 40. In other respects, this embodiment is similar in configuration to the above-described embodiment.

[0086] As described above with reference to Fig. 9, the shape of the surface panel is not limited to a square, but can be a circle as shown in Fig. 9, or a polygonal shape such as a diamond, rectangle, star, triangle, pentagon, or hexagon, allowing for a variety of designs. Furthermore, by forming a circular partition wall on the surface panel, for example, it is possible to accommodate a variety of surface panel shapes even if the shape of the connecting member 40 is standardized to a circular shape. Therefore, there is no need to manufacture a different connecting member 40 for each handle shape, and various handle shapes can be used while keeping manufacturing costs down, further facilitating improved design.

[0087] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 9). However, the present invention is not limited to the above embodiments, and can be embodied in various forms without departing from the spirit of the present invention. [Explanation of symbols]

[0088] 1. Door 1a…Surface 10...Pedestal 20...Rotating body 30...Handle 31…Surface plate part 31c...Tilt tip 32...Surrounding plate part 40... Joint member 40d...Outer surface (opposing surface) 44a...spring (urging means)

Claims

1. A plate-shaped base that is fixed to the door, a surface plate portion disposed at a predetermined distance from the surface of the door so as to cover the base, and a handle having a long plate-shaped peripheral plate portion erected from the peripheral edge of the surface plate portion toward the door so as to surround the base; A joining member disposed between the surface plate portion and the base, which joins the handle to the base so that the surface plate portion can tilt between a normal state in which the surface plate portion is substantially parallel to the surface of the door and an inclined state in which the surface plate portion is inclined at a predetermined angle with respect to the surface of the door, forming a gap between the tilting tip of the surface plate portion and the base so that a finger can be inserted. A door handle structure comprising:

2. a rotor rotatably supported on the base, The joint member joins the handle to the base via the rotating body so that the handle can tilt, and also joins the handle to the rotating body so that the rotating body can be rotated. The door handle structure according to claim 1.

3. 3. The door handle structure according to claim 1, further comprising: a biasing means for biasing the handle to the normal state.

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