JP2006070620A - Lever handle shaft engaging structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever handle shaft engaging structure which can easily assemble a square shaft with a simple structure without increasing the number of components and can reduce looseness only by the insertion of the square shaft. <P>SOLUTION: In the lever handle shaft engaging structure for the square shaft 25 to the end part of which a lever handle 21 is fitted and a cam member rotatably provided to a lock box and having a square hole, recessed grooves 37 along the direction of the shaft line 35 are formed on at least two side surfaces 25a, 25b along the shaft line direction of the square shaft 25 in a longitudinal direction of the square shaft 25. Both leg parts 39a, 39b of a linear spring member 33 bent in substantially a U-shape are engaged in the two recessed grooves 37, while curved parts 41, 41 projecting from the side surfaces 25a, 25b and coming into contact with the inner surfaces are provided at the positions of the linear spring member 33 facing the inner surface of the square hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lever handle shaft fitting structure for fitting a square shaft into a square hole of a cam member incorporated in a lock box without rattling.

  Some locking devices provided on the door have their operating force input by a rotating operation of a lever handle. As shown in FIG. 11, the locking device includes a lock box 1 built in the door, a dead bolt 3 and a latch fixed to the lock box 1 and fixed to the door of the door and built in the lock box 1. Relative rotation to a plate member 7 having a rectangular hole for moving the bolt 5 forward, a cam member 9 rotatably provided in the lock box 1 to advance and retract the latch bolt 5 by the input of rotational force, and a square hole 9a of the cam member 9 It consists of a rectangular shaft 11 that is impossiblely inserted, and lever handles 13 and 15 that are fixed to both ends of the rectangular shaft 11. In the figure, 17 is a handle set screw, and 19 is a substantially donut-shaped escation located on the door surface around the base ends of the lever handles 13 and 15.

  In this locking device 20, after the lock box 1 and the plate member 7 are fixed to a door (not shown), the distal end of the square shaft 11 with the lever handle 13 fixed to the base end from one surface of the door is the cam member 9. The lever handle 15 is fixed to the tip of the square shaft 11 that is inserted into the square hole 9a and penetrates the other surface of the door. Then, when the lever handle 13 or 15 is rotated, the cam member 9 fitted to the square shaft 11 so as not to be relatively rotatable rotates to operate the advance / retreat mechanism in the lock box 1 to advance / retreat the latch bolt.

  By the way, as the fitting accuracy between the square hole 9a formed in the cam member 9 and the square shaft 11 that supports the lever handles 13 and 15 becomes higher, more labor and advanced technology are required. In addition, due to the division of labor between the lock box manufacturer and the lever handle manufacturer, there is a tendency that the tolerance of the fitting portion becomes large in order to provide versatility. For this reason, rattling tends to occur between the square shaft 11 and the square hole 9a, and some users may feel uncomfortable with the operation.

In response to such a problem, various measures have been taken in the lever handle shaft fitting structure to prevent rattling between the square hole and the square shaft. For example, a concave groove is formed in a portion of a square axis corresponding to a square hole, a flexible plate-like piece is inserted into this concave groove, and the plate-like piece is bent by screwing a handle set screw. In some cases, rattling is eliminated by pressing the bent plate-shaped piece against the square axis and the square hole. In addition, a mounting groove is formed in the portion of the square shaft corresponding to the square hole, and a plate spring having a mountain-shaped portion is fixed in the mounting groove by a fixing means, so that when the square shaft is inserted into the square hole, the plate Some springs were elastically deformed to eliminate rattling.
Japanese Utility Model Publication No. 58-32516

  However, in a structure that eliminates rattling by bending the plate-shaped piece by screwing the handle set screw, the plate-shaped piece cannot be held on the square axis until the handle set screw is screwed. In addition, there are problems in that workability is poor such as the plate-like piece being displaced or dropped when the square shaft is inserted. Further, in the structure in which the mounting groove is formed in the square shaft and the leaf spring is fixed to the mounting groove by the fixing means, a fixing means for fixing the leaf spring is required separately, and the structure is complicated and the number of parts is also increased. In addition, a complicated square shaft assembling process (fixing means press-fitting or caulking process) using the fixing means has occurred.

  The present invention has been made in view of the above circumstances, and has a simple structure, can be easily assembled without increasing the number of parts, and can be easily assembled, and the lever handle shaft can be reduced only by inserting the angular shaft. The object is to provide a fitting structure.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The lever handle shaft fitting structure according to claim 1 of the present invention is a cam member 31 having a square shaft 25 to which the lever handles 21 and 23 are attached at the end, and a square hole 29 provided rotatably in the lock box. And lever handle shaft fitting structure,
On at least two side surfaces 25a and 25b along the axial direction of the angular axis 25, concave grooves 37 and 37 in the direction along the axial line 35 are formed across the longitudinal direction of the angular axis 25,
Both the leg portions 39a and 39b of the linear spring member 33 bent in a substantially U shape are fitted into the two concave grooves 37 and 37, and the linear spring member 33 faces the inner surface 29a of the square hole 29. A curved portion 41 that protrudes from the side surfaces 25a and 25b and press-contacts the inner surface 29a is formed at the site.

  In this lever handle shaft fitting structure, when both the leg portions 39a, 39b are fitted into the concave grooves 37, 37, the square shaft 25 is sandwiched between the both leg portions 39a, 39b, and the linear spring member 33 is moved to the both leg portions 39a, 39b. It is held on the square axis 25 via 39b. Therefore, the square shaft 25 can be inserted into the square hole 29 while the linear spring member 33 is held. And if the square shaft 25 holding the linear spring member 33 is inserted, the bending part 41 will be elastically deformed and the shakiness of the square shaft 25 with respect to the square hole 29 will be controlled by the elastic restoring force.

  The lever handle shaft fitting structure according to claim 2 is characterized in that the bending portion 41 is provided on both legs 39 a and 39 b of the linear spring member 33.

  In this lever handle shaft fitting structure, compared with the case where the curved portion 41 is provided on one of the leg portions 39a and 39b, the elastic restoring force can be generated at two locations, and the inner surfaces 29a facing each other of the square holes 29 can be configured. 29a, and the elastic restoring force is shared by the two curved portions 41, 41, so that the curved portions 41, 41 are less likely to sag.

  In the lever handle shaft fitting structure according to claim 3, the concave groove 37 is provided on a pair of parallel side surfaces 25 a and 25 b along the axis 35 of the angular shaft 25, and the axis 35 is point-symmetric with respect to one side. The corner portions 61 and 61 are arranged close to each other.

  In this lever handle shaft fitting structure, the concave grooves 37, 37 provided on the pair of parallel side surfaces 25a, 25b are close to the corners 61, 61 on one side of the axis 35 of the angular shaft 25 in a point symmetry. By being arranged so as to be shifted to each other, the elastic restoring force generated by the linear spring member 33 fitted in each of the concave grooves 37, 37 acts as a moment for rotating the square shaft 25 in one direction. As a result, the square shaft 25 is pressed against the square hole 29 in the rotational direction around the axis.

The lever handle shaft fitting structure according to claim 4 is a lever comprising a square shaft 25 to which the lever handles 21 and 23 are attached at the end, and a cam member 31 having a square hole 29 rotatably provided in the lock box. Handle shaft fitting structure,
A recess 71 is formed in a portion facing the inner surface 29a of the square hole 29 of at least one side surface 25a along the axial direction of the angular axis 25,
A spherical member 73 made of an elastic material that protrudes partly from the one side surface 29 a and press-contacts the inner surface 29 a is fitted into the recess 71.

  In this lever handle shaft fitting structure, rattling is restricted only by the small recess 71 formed on the side surface 25a of the square shaft 25 and the small spherical member 73 fitted in the recess 71, and the amount of processing is extremely small. With a simple structure, it is possible to hold the spherical member 73 and to regulate the rattling of the angular shaft 25 by the elastic restoring force of the spherical member 73.

In the lever handle shaft fitting structure according to claim 5, the concave portion 71 is provided on two adjacent side surfaces 25a and 25c,
The spherical members 73 and 73 are fitted in the two recesses 71 and 71, respectively.

  In this lever handle shaft fitting structure, the two adjacent side surfaces 25a, 25c of the square shaft 25 are pressed against the two adjacent inner surfaces 29a of the square hole 29, and the corners are angled in two horizontal and vertical directions perpendicular to the axis 35. The shaft 25 is pressed against the inner surface 29 a of the square hole 29.

In the lever handle shaft fitting structure according to claim 6, a plurality of the recesses 71 are provided in the axial direction of the angular shaft 25.
The spherical member 73 is fitted in each of the plurality of recesses 71.

  In this lever handle shaft fitting structure, the spherical member 73 generated when the square shaft 25 is pressed against the inner surface 29a of the square hole 29 at a plurality of locations in the axial direction and the spherical member 73 is pressed against the inner surface 29a at one location in the axial direction. Oscillation around the fulcrum is eliminated.

  According to the lever handle shaft fitting structure according to the first aspect of the present invention, the concave portions are formed on at least two side surfaces of the square shaft, and both leg portions of the linear spring member bent into a substantially U shape are formed on the concave portions. Since the linear spring member is formed with a curved portion that fits into the groove and protrudes from the concave groove and press-contacts the inner surface of the square hole, the linear shaft is sandwiched between the leg portions fitted into the concave groove. The angular axis can be held, and in this state, by inserting the angular axis into the square hole, the bending portion can be elastically deformed, and the elastic restoring force can prevent the angular axis from rattling against the square hole. . As a result, it is possible to fit with a simple structure without using other members, and with an easy operation of simply inserting the square shaft, while suppressing the rattling of the square shaft and the square hole. .

  According to the lever handle shaft fitting structure according to the second aspect, since the curved portions are provided on both the leg portions of the linear spring member, the location where the elastic restoring force is generated is 2 as compared with the case where one curved portion is provided. A fitting structure that can be configured with locations, pressed against each opposing inner surface of the square hole, and is less prone to sag in the curved portion, and can maintain elastic restoring force over a long period of time, with no rattling Can be maintained for a long time.

  According to the lever handle shaft fitting structure according to the third aspect, the concave grooves are provided on the pair of parallel side surfaces, and the axis line is arranged near the corner on one side in a point-symmetric manner, Thus, the angular axis can be pressed in the rotational direction around the axis, and the pressing force can be applied in the rotational direction of the angular axis to effectively suppress the rattling in the rotational direction.

  According to the lever handle shaft fitting structure according to claim 4, the concave portion is formed in the square hole facing portion of at least one side surface of the square shaft, and the spherical member press-contacted to the inner surface of the square hole is fitted into the concave portion. Therefore, it is possible to eliminate rattling by processing only a small concave portion and a small spherical member fitted into the concave portion, and an extremely simple structure with a small amount of processing, and only by inserting a square shaft into a square hole. The spherical member can be elastically deformed, and its elastic restoring force can prevent the angular axis from rattling with respect to the square hole. As a result, it is possible to fit with a simple structure without using other members, and with an easy operation of simply inserting the square shaft, while suppressing the rattling of the square shaft and the square hole. .

  According to the lever handle shaft fitting structure according to claim 5, since the concave grooves are provided in the two adjacent side surfaces and the spherical member is fitted in each of the concave portions, the two adjacent side surfaces of the square shaft are square holes. The shakiness of the angular axis can be more reliably suppressed in two horizontal and vertical directions that are pressed against the two inner surfaces adjacent to each other and orthogonal to the axis.

  According to the lever handle shaft fitting structure according to claim 6, since the plurality of recesses are provided in the axial direction of the angular axis and the spherical member is fitted in each of the recesses, the square shaft is square at a plurality of locations in the axial direction. The inner surface of the spherical member is pressed against each other, and the swinging with the spherical member as a fulcrum generated when the spherical member is pressed at one place can be eliminated, and the rattling can be more reliably suppressed.

Preferred embodiments of a lever handle shaft fitting structure according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a perspective view of one end of a square shaft of the lever handle shaft fitting structure according to the present invention, FIG. 2 is a perspective view of the other end of the square shaft of the lever handle shaft fitting structure according to the present invention, and FIG. 4 is a cross-sectional view of the lever handle shaft fitting structure according to the present invention in a direction along the axis, and FIG. 5 is a diagram illustrating different arrangement positions of the linear spring member. Sectional drawing of the modification shown by (c), FIG. 6 is a top view of the linear spring member by which the curved part was formed in the one leg part.
The lever handle shaft fitting structure according to the present embodiment has a square shaft 25 to which the lever handles 21 and 23 are attached at both ends, and a cam having a square hole 29 rotatably provided in the lock box 1 (see FIG. 11). The member 31 and the linear spring member 33 attached to the square shaft 25 are configured as main members. In the present embodiment, the cam member 31 is illustrated as a simplified shaft shape without describing the detailed shape of the outer shape thereof.

  Two concave grooves 37, 37 in the direction along the axis 35 are continuously formed in the angular axis 25 along the longitudinal direction on at least two side surfaces 25 a, 25 b along the axial direction. In the present embodiment, the two side surfaces are parallel side surfaces 25 a and 25 b that sandwich the axis 35.

  Both the leg portions 39a, 39b of the linear spring member 33 bent into a substantially U shape are fitted into the concave grooves 37, 37 of the square shaft 25. The linear spring member 33 is made of spring steel or piano wire, and has an overall length substantially the same as the angular axis 25. A curved portion 41 that protrudes from the side surfaces 25 a and 25 b and presses against the inner surface 29 a of the square hole 29 is formed at a portion facing the inner surface 29 a of the square hole 29 of the linear spring member 33. In the present embodiment, the curved portion 41 is provided on both the leg portions 39a and 39b of the linear spring member 33, respectively.

  At the base end (left end in FIG. 1) of the square shaft 25, a press-fitting hole 43 is formed in the other side surface 25c sandwiched between the two side surfaces 25a and 25b where the concave grooves 37 and 37 are formed. One lever handle 21 is formed with a mounting portion 47 formed with a mounting hole 44 into which the base end of the square shaft 25 is fitted, and the mounting portion 47 is formed with a fixing hole 49 penetrating the mounting hole 44. Yes. In addition, a screw hole 51 is formed in the other side surface 25c sandwiched between the two side surfaces 25a and 25b where the concave grooves 37 and 37 are formed at the tip of the square shaft 25 (the right end in FIG. 1). The other lever handle 23 is formed with a mounting portion 53 having a mounting hole 45 into which the tip of the square shaft 25 is fitted. The mounting portion 53 has a screw insertion hole 55 penetrating into the mounting hole 45. Yes.

  In order to assemble the lever handles 21 and 23 to the lock box 1, first, the both leg portions 39 a and 39 b of the linear spring member 33 are fitted into the concave grooves 37 and 37 of the square shaft 25. The linear spring member 33 is mounted so that both ends (the distal ends of both leg portions 39a and 39b) are on the proximal end side of the angular shaft 25. As a result, the linear spring member 33 is held by the square shaft 25 with the square shaft 25 held between the leg portions 39a and 39b.

Next, the base end of the square shaft 25 is inserted into the mounting hole 44 of one lever handle 21. A fixing pin 57 is press-fitted into the fixing hole 49 of the mounting portion 47 of the lever handle 21 into which the rectangular shaft 25 is inserted, and the lever handle 21 and the rectangular shaft 25 are fixed.
In this state, the tip of the square shaft 25 is inserted into the square hole 29 of the cam member 31 of the lock box 1 built in the door. When the square shaft 25 is inserted to a predetermined position, the bending portion 41 is elastically deformed and press-fitted into the square hole 29. As shown in FIG. 3, the press-fitted bending portion 41 is pressed against the inner surface 29 a of the square hole 29 by an elastic restoring force.

  Next, the mounting hole 45 of the other lever handle 23 is inserted into the tip of the square shaft 25 that penetrates the cam member 31 and protrudes from the other surface of the door. The lever handle 23 is fixed to the tip end of the square shaft 25 by screwing a handle set screw 59 inserted into the mounting hole 45 of the mounting portion 53 into the screw hole 51 of the square shaft 25. As a result, as shown in FIG. 4, the lever handles 21 and 23 are fixed to both ends of the angular shaft 25 penetrating the cam member 31, and the movement of the angular shaft 25 in the axial direction is restricted by the lever handles 21 and 23. The lever handles 21 and 23 are completely attached to the lock box 1.

  In this lever handle shaft fitting structure, when both the leg portions 39a, 39b are fitted into the concave grooves 37, 37, the square shaft 25 is sandwiched between the both leg portions 39a, 39b, and the linear spring member 33 is moved to the both leg portions 39a, 39b. It is held on the square axis 25 via 39b. Since the linear spring member 33 is bent in a U-shape, if the bent portion 33a is pushed into the tip, the bent portion 33a comes into contact with the tip surface of the square shaft 25, and the reaction force due to the push is applied from the square hole 29. It will not fall off. That is, it is possible to securely hold the rectangular shaft 25 without separately providing a fixing means. Thereby, the square shaft 25 can be inserted into the square hole 29 in a state where the linear spring member 33 is held. And if the square shaft 25 holding the linear spring member 33 is inserted, the bending part 41 will be elastically deformed and the shakiness of the square shaft 25 with respect to the square hole 29 will be controlled by the elastic restoring force.

  Therefore, according to this lever handle shaft fitting structure, the concave portions 37 and 37 are formed in at least two side surfaces 25a and 25b of the square shaft 25, and both leg portions 39a of the linear spring member 33 bent into a substantially U shape. , 39b are fitted into the concave grooves 37, 37, and the curved portion 41 that protrudes from the concave grooves 37, 37 and presses against the inner surface 29a of the square hole 29 is formed in the linear spring member 33. Therefore, the concave grooves 37, 37 are formed. It is possible to hold the linear spring member 33 on the square shaft 25 by sandwiching the square shaft 25 between the legs 39a and 39b fitted into the square shaft 25, and in this state, the square shaft 25 is inserted into the square hole 29 so as to bend. The portion 41 is elastically deformed, and the elastic restoring force can prevent the angular shaft 25 from rattling with respect to the square hole 29. As a result, it is possible to fit the square shaft 25 to the square hole 29 with a simple structure without using other members and with an easy operation of simply inserting the square shaft 25 while suppressing rattling. .

  In addition, since the curved portion 41 is provided on both the leg portions 39a and 39b of the linear spring member 33, compared to the case where one curved portion 41 is provided, it is less likely to cause sag, and the elastic restoring force is increased over a long period of time. It is possible to maintain the fitting structure without rattling for a long time.

  In the above embodiment, the case where the concave grooves 37 and 37 are provided in the two parallel side surfaces 25a and 25b has been described as an example. However, the lever handle shaft fitting structure according to the present invention is shown in FIG. ), Two parallel pairs of side surfaces 25a and 25b and side surfaces 25c and 25d may be formed with concave grooves 37, 37, 37 and 37, and linear spring members 33 and 33 may be attached to the grooves. .

  Further, as shown in FIG. 5 (b), concave grooves 37, 37, 37 are formed on two parallel side surfaces 25a, 25b and one side surface 25c sandwiched between the side surfaces 25a, 25b. The spring member 33A may be inserted.

  Further, as shown in FIG. 5 (c), the concave grooves 37, 37 are provided on a pair of parallel side surfaces 25 a, 25 b along the axis of the angular axis 25, and the corner 61 on one side is symmetrical with respect to the axis 35. , 61 (the ridge line portion of the angular axis 25) may be arranged so as to be offset. According to such a configuration, the concave grooves 37, 37 provided on the pair of parallel side surfaces 25a, 25b are close to the corners 61, 61 on one side so as to be symmetrical with respect to the axis 35 of the angular axis 25. By being arranged close to each other, the elastic restoring force generated by the linear spring member 33 fitted in each of the concave grooves 37 and 37 rotates the angular axis 25 in one direction (counterclockwise direction in the illustrated example). Acts as a moment. As a result, the angular shaft 25 is pressed against the square hole 29 in the rotational direction around the axis, and rattling in the rotational direction can be effectively suppressed.

  Further, in the above embodiment, the curved portions 41 are provided on both the leg portions 39a and 39b of the linear spring member 33. However, as shown in FIG. 6, the linear spring member 33 is provided only on one leg portion 39a. A curved portion 41 may be provided. According to such a configuration, the pressure input to the square hole 29 of the square shaft 25 can be reduced, and the attachment workability can be improved.

Next, a second embodiment of the lever handle shaft fitting structure according to the present invention will be described.
FIG. 7 is an exploded perspective view showing a second embodiment of the lever handle shaft fitting structure according to the present invention, and FIG. 8 is a cross section in the direction along the axis of the lever handle shaft fitting structure according to the second embodiment. FIG. 9 is a cross-sectional view of the cam member fitted with the square shaft shown in FIG. 8, and FIG. 10 is a cross-sectional view of a modified example showing different arrangement positions of the spherical member.
In addition, the same code | symbol is attached | subjected to the member same as the member shown in FIGS. 1-4 in 1st Embodiment mentioned above, and the overlapping description shall be abbreviate | omitted.
In the lever handle shaft fitting structure according to the second embodiment, a recess 71 is formed at a portion facing the inner surface 29a of the square hole 29 of at least one side surface 25a along the axial direction of the angular shaft 25, and the side surface 25a. A spherical member 73 made of an elastic material that protrudes partly from the inner surface 29 and press-contacts the inner surface 29 a is fitted in the recess 71. The spherical member 73 has a substantially spherical shape or a shape close to a true sphere such as an elliptical sphere, and a resin such as a slightly hard synthetic resin material or a metal can be used. In addition, the spherical member 73 is fitted into the concave portion 71 by an adhesive, and the diameter of the circular opening of the concave portion 71 is slightly smaller than the diameter of the spherical member 73, and the spherical member 73 is press-fitted into the concave portion 71. The dropout may be restricted and held in the recess 71.

  In this lever handle shaft fitting structure, as shown in FIG. 8, when the tip end of the square shaft 25 is inserted into the square hole 29 of the cam member 31 and the square shaft 25 is inserted to a predetermined position, as shown in FIG. As described above, the spherical member 73 is elastically deformed and pressed against the inner surface 29a of the square hole 29 by an elastic restoring force. Thereby, rattling is restricted only by the small concave portion 71 formed on the side surface of the square shaft 25 and the small spherical member 73 fitted to the concave portion 71, and the spherical member has a very simple structure with a small amount of processing. 73 and the rattling of the angular axis 25 by the elastic restoring force of the spherical member 73 can be controlled.

  Therefore, according to this lever handle shaft fitting structure, the concave portion 71 is formed in the square hole facing portion of the at least one side surface 25a of the square shaft 25, and the spherical member that presses the inner surface 29a of the square hole 29 in the concave portion 71. 73 is fitted, the rattling can be eliminated only by processing of the small concave portion 71 and the small spherical member 73 fitted to the concave portion 71, and has an extremely simple structure with a small amount of processing, and the angular axis. The spherical member 73 can be elastically deformed only by inserting 25 into the square hole 29, and rattling of the square shaft 25 with respect to the square hole 29 can be prevented by the elastic restoring force. As a result, it is possible to fit the square shaft 25 into the square hole 29 with a simple structure without using other members and with an easy operation of simply inserting the square shaft 25 while suppressing rattling. .

  In the above embodiment, the case where the concave portion 71 is provided on one side surface 25a has been described as an example. However, in the lever handle shaft fitting structure according to the present invention, as shown in FIG. It is provided on the two side surfaces 25a and 25c, and the spherical members 73 and 73 may be fitted in the two recesses 71 and 71, respectively. According to such a configuration, the two adjacent side surfaces 25 a and 25 c of the square axis 25 are pressed against the two adjacent inner surfaces 29 a and 29 a of the square hole 29, and the horizontal and vertical directions orthogonal to the axis 35 are in two directions. Shaking of the angular axis 25 can be reliably suppressed.

  Although not shown, the lever handle shaft fitting structure according to the present invention has a plurality of recesses equivalent to the recess 71 in the axial direction of the angular axis, and a spherical member is fitted in each of the plurality of recesses. The structure may be combined. According to such a configuration, the angular axis is in press contact with the inner surface of the square hole at a plurality of positions in the axial direction, and the swinging with the spherical member as a fulcrum that occurs when the spherical member is pressed at one position can be eliminated. It is possible to suppress rattling more reliably. In particular, on one side surface 25a (25b, 25c, 25d) of the square shaft 25, a plurality of recesses are arranged in a staggered manner rather than in series along the axis, so that a spherical member fitted into these recesses can be obtained. The pressure contact position is not parallel to the axis line with respect to the inner surface of the square hole, but is a pressure contact position that is obliquely decentered with respect to the axis line, and rattling between the square hole and the square axis is more reliably suppressed. It becomes.

It is a perspective view of the square shaft one end side of the lever handle shaft fitting structure according to the present invention. It is a perspective view of the other end side of the square shaft of the lever handle shaft fitting structure according to the present invention. It is sectional drawing of the cam member by which the square axis was fitted. It is sectional drawing of the direction in alignment with the axis line of the lever handle shaft fitting structure which concerns on this invention. It is sectional drawing of the modification which showed the arrangement | positioning position from which a linear spring member differs by (a)-(c). It is a top view of the linear spring member in which the curved part was formed in the one leg part. It is a disassembled perspective view showing 2nd Embodiment of the lever handle shaft fitting structure which concerns on this invention. It is sectional drawing of the direction in alignment with the axis line of the lever handle shaft fitting structure which concerns on 2nd Embodiment. It is sectional drawing of the cam member by which the square axis shown in FIG. 8 was fitted. It is sectional drawing of the modification which showed the arrangement | positioning position from which a spherical member differs. It is a disassembled perspective view of the conventional lever handle shaft fitting structure.

Explanation of symbols

21, 23 ... Lever handle 25 ... Square shaft 25a, 25b ... Two side surfaces 29 ... Square hole 29a ... Square hole inner surface 31 ... Cam member 33 ... Linear spring member 35 ... Axis 37 ... Concave groove 39a, 39b ... Both legs 41 ... curved part 61 ... corner 71 ... concave part 73 ... spherical member

Claims (6)

A lever handle shaft fitting structure of a square shaft to which a lever handle is attached to an end and a cam member having a square hole rotatably provided in a lock box,
On at least two side surfaces along the axial direction of the angular axis, concave grooves in the direction along the axial line are formed across the longitudinal direction of the angular axis,
Both the leg portions of the linear spring member bent in a substantially U shape are fitted into the two concave grooves, and project from the side surface to the portion of the linear spring member facing the inner surface of the square hole. A lever handle shaft fitting structure, characterized in that a curved portion is formed in pressure contact with the lever handle shaft.   2. The lever handle shaft fitting structure according to claim 1, wherein the curved portions are provided on both leg portions of the linear spring member.   2. The concave groove is provided on a pair of parallel side surfaces along the axis of the angular axis, and the axis is arranged near the corner on one side so as to be symmetric with respect to the axis. Or the lever handle shaft fitting structure of 2. A lever handle shaft fitting structure of a square shaft to which a lever handle is attached to an end and a cam member having a square hole rotatably provided in a lock box,
A recess is formed in a portion facing the inner surface of the square hole on at least one side surface along the axial direction of the angular axis,
A lever handle shaft fitting structure, wherein a spherical member made of an elastic material that protrudes from one side surface and press-contacts the inner surface is fitted into the recess. The recess is provided on two adjacent side surfaces;
5. The lever handle shaft fitting structure according to claim 4, wherein the spherical member is fitted into each of the two recesses. A plurality of the recesses are provided in the axial direction of the angular axis,
6. The lever handle shaft fitting structure according to claim 4, wherein the spherical member is fitted into each of the plurality of recesses.

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