JP2009299855A - Component with knob - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component with a knob, by which an operation for loosening a screw is easier than an operation for tightening the screw. <P>SOLUTION: Three projection parts 15 projecting outward in a radial direction of a shaft member 13, and three recess parts 17 bumped inward in the radial direction of the shaft member 13 are alternately formed on an outer periphery of a knob 7 in a circumferential direction of the shaft member 13. A locking part 19 for locking fingers of an operator gripping the knob 7 is formed near the projection parts 15 adjacent to each other in a counterclockwise direction (other direction) relative to the recess parts 17, when the knob 7 is seen from a front for the recesses 17. Also, the locking part for locking the fingers of the operator is not formed between the projection parts 15 adjacent to each other in a clockwise direction (one direction) relative to the recess parts 17 and the recess parts 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a component with a knob in which a knob is fixed to one end of a shaft member on which a threaded portion is formed.

In FIG. 6 of Japanese Patent Laid-Open No. 2003-54472 (Patent Document 1) and FIGS. 3 and 4 of Japanese Patent Laid-Open No. 2004-132442 (Patent Document 2), a knob is provided at one end of a shaft member on which a screw portion is formed. An example of a fixed conventional knobd part is shown. A knob used in a conventional knob-equipped component has three convex portions that are convex toward the radially outer side of the shaft member and three concave portions that are concave toward the radially inner side of the shaft member. It has the shape formed in the outer peripheral part of the knob so that it may appear alternately in the circumferential direction of the shaft member.
FIG. 6 of Japanese Patent Laying-Open No. 2003-54472 (Patent Document 1) 3 and 4 of Japanese Patent Laid-Open No. 2004-132442 (Patent Document 2).

  However, in the knob of the conventional knob-equipped component, the three convex portions and the concave portion have shapes that are symmetrical with respect to a virtual center line extending in the radial direction of the shaft. And the shape of a recessed part and a convex part is a shape where an operator's finger | toe is easily caught even when turning a knob in any direction. Therefore, in conventional parts with knobs, when a strong person turns the knob and tightens the screw part more than necessary against the other screw part, a screw with a weaker person turning the knob reversely Even when trying to loosen the part, the knob could not be turned backwards.

  The objective of this invention is providing the component with a knob provided with the knob which is easy to perform the operation which loosens a screw rather than the operation which tightens a screw.

  A component with a knob to be improved by the present invention includes a shaft member in which a threaded portion is formed, and a knob fixed to one end of the shaft member and gripped by an operator's hand. When the shaft member is rotated in one direction around the axis of the shaft member, the threaded portion provided on the shaft member is relatively with respect to the member to be screwed into which the threaded portion is screwed. The shaft member is formed so as to move backward relative to the member to be screwed when the shaft member is advanced and rotated in the other direction opposite to one direction around the axis. Further, the knob is configured such that a plurality of convex portions that are convex toward the radially outer side of the shaft member and a plurality of concave portions that are concave toward the radially inner side of the shaft member alternately appear in the circumferential direction of the shaft member. It has a shape formed on the outer periphery of the knob. When a male screw is formed on the threaded portion of the shaft member, a female screw to be screwed with the male screw is formed on the member to be screwed. Conversely, when a female thread is formed on the threaded portion of the shaft member, a male thread is formed on the threaded member.

  In such a part with a knob, in the present invention, the concave part is formed with a locking part capable of locking an operator's finger holding the knob in the vicinity of the convex part adjacent to the concave part in the other direction. It is determined that the locking portion that can lock the operator's finger is not formed between the convex portion adjacent to the concave portion in one direction and the concave portion. In this way, even if the operator rotates the knob in one direction and tries to fasten the threaded portion to the screwed portion with a strong force, the locking portion locks the finger in one direction with respect to the recess. Therefore, it is difficult to apply a rotational force to the shaft member via the knob. Conversely, when the operator rotates the knob in the other direction and tightens the screw portion with respect to the screwed portion, there is a locking portion that locks the finger in the other direction with respect to the recess. Therefore, the operator can easily rotate the knob in the other direction by locking the finger to the locking portion. Therefore, according to the present invention, it is possible to provide a knob-equipped component including a knob that is easier to loosen the screw than to tighten the screw.

  Preferably, the plurality of convex portions have the same shape and are formed at equal intervals in the circumferential direction, and the plurality of concave portions have the same shape and are formed at equal intervals in the circumferential direction. In this way, when the knob is repeatedly rotated, the knob can always be turned with the same touch.

  Moreover, it is preferable that the outer peripheral surface of a convex part and the outer peripheral surface of a recessed part are formed by the curved surface which continues mutually. Thus, when the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are constituted by a curved surface, the operator moves the finger in the circumferential direction along the outer peripheral surface of the knob, thereby moving the finger toward the locking portion. Can be moved. In particular, if the main part of the curved surface constituting the outer peripheral surface of the plurality of convex portions is formed so as to be along one virtual cylindrical surface centering on the axis, the knob becomes easier to grip and more smoothly to the locking portion. It becomes possible to move the finger.

  The number of the plurality of convex portions and the plurality of concave portions is preferably two, three, or four, respectively. If the number of protrusions and recesses is too large, it will be difficult to secure a sufficiently large locking portion, and it will be difficult to determine the position of the operator's fingers with respect to the knob, resulting in poor operability. . If the number of the plurality of convex portions and the plurality of concave portions is three respectively, when loosening the screw connection, in addition to the operator's two fingers (thumb, index finger), one more finger (middle finger or ring finger) The knob can be turned with the greatest force by being respectively locked with the three locking portions.

  ADVANTAGE OF THE INVENTION According to this invention, the components with a knob provided with the knob which can perform the operation which loosens a screw more easily than the operation which tightens a screw can be provided.

  Hereinafter, an example of an embodiment of a component with a knob according to the present invention will be described in detail with reference to the drawings. FIGS. 1A to 1C are views showing a state where the knob-equipped component 1 according to the embodiment of the present invention is used for adjusting the angle of the handle 5 of the training bike 3. 1A is a left side view of the training bike 3, FIG. 1B is a rear view of the training bike 3, and FIG. 1C is a partially enlarged perspective view of the training bike 3. In this example, the operator sitting on the saddle 9 of the knob 7 of the component 1 with the knob rotates clockwise, thereby fixing the angle of the handle 5 and rotating the knob 7 counterclockwise. The screw connection described later is loosened, and the handle 5 becomes free. In the following description, the clockwise direction specified in the state shown in FIG. 1 is defined as one direction, and the counterclockwise direction is defined as the other direction.

  2 (A) to 2 (C) are perspective views of the part 1 with the knob when the knob 7 is positioned forward and viewed from the diagonally upper right position, and the knob 7 is positioned rearward and from the diagonally upper right position. It is the perspective view which looked, and the rear view of the component 1 with a knob. FIG. 3 is a front view of the knob 7 integrally molded with synthetic resin. The knob-equipped component 1 includes a synthetic resin knob 7 that is gripped by an operator's hand, and a screw portion 11 in which the knob 7 is fixed at one end and a male screw is formed on the outer periphery of the other end (tip). And a metal shaft member 13.

  Usually, the training bike 3 is installed in a sports club or the like, and is used by men and women sports club members of various physiques and ages. And before starting the exercise | movement by this training bike 3, the height of the saddle 9 and the angle of the handle 5 are adjusted, and it fixes to the position where it is easy to exercise according to one's body shape. Accordingly, the knob 7 of the part 1 with the knob rotated in one direction to fix the handle 5 by the previously used member is loosened in the other direction by another member to be used next, and the angle of the handle 5 is adjusted. Will do.

  As shown in FIGS. 2A to 2C, the knob 7 used in the present embodiment has a cup-like structure that opens toward the shaft member 13 side. The knob 7 includes a wall portion 7A facing the palm of the operator, a peripheral wall portion 7B extending from the outer peripheral portion of the wall portion 7A to the shaft member 13 side, and a cylindrical shape protruding from the central portion of the wall portion 7A to the shaft member 13 side. Hub 7C, and a plurality of reinforcing ribs 7D provided between the hub 7C and the peripheral wall portion 7B and extending radially. The outer peripheral surface of the peripheral wall portion 7B of the knob 7 is not subjected to anti-slip processing.

  The shaft member 13 has a threaded portion 11 at the end opposite to the one end to which the knob 7 is fixed. A male screw is formed on the screw portion 11 provided on the shaft member 13. A nut member 25 (FIG. 4) provided with a female screw to which the screw portion 11 is screwed is fixed inside a front frame 4 of the training bike 3 described later. In FIG. 2, the male screw formed on the screw portion 11 is not shown.

  In the present embodiment, when the knob 7 is rotated in the clockwise direction and the shaft member 13 is rotated in the clockwise direction (one direction) about the axis X of the shaft member, the male screw of the screw portion 11 Is screwed with a female screw of a nut member 25 (FIG. 4) as a member to be screwed, and the shaft member 13 advances relative to the nut member 25. In the present embodiment, actually, the shaft member 13 does not move forward, and the nut member 25 approaches the knob 7 side. Further, when the knob 7 is rotated in the counterclockwise direction and the shaft member 13 is rotated around the axis X in the other direction opposite to the one direction, the male screw of the screw portion 11 is turned into the nut member 25 (FIG. The shaft member 13 is moved backward relative to the nut member 25 by being screwed with the female screw 4). In the present embodiment, actually, the shaft member does not move backward, and the nut member 25 moves in a direction away from the knob 7.

  As shown in FIGS. 2 and 3, the knob 7 includes three convex portions 15 that are convex toward the radially outer side of the shaft member 13 and three concave portions 17 that are concave toward the radially inner side of the shaft member 13. Are formed on the outer periphery of the knob 7 so as to appear alternately in the circumferential direction of the shaft member. In the present embodiment, the three convex portions 15 have the same shape. The three recesses 17 have the same shape and are formed at equal intervals in the circumferential direction. The outer peripheral surfaces of the three convex portions 15 and the outer peripheral surfaces of the three concave portions 17 are formed by curved surfaces that are continuous with each other. When the outer peripheral surface of the convex portion 15 and the outer peripheral surface of the concave portion 17 are configured by a curved surface as in the present embodiment, the operator moves the finger in the circumferential direction along the outer peripheral surface of the knob 7. The finger can be moved to the locking portion 19.

  Specifically, the three convex portions 15 are formed at equal intervals in the circumferential direction of the shaft member 13. And the principal part of the curved surface which comprises the outer peripheral surface of the three convex parts 15 is formed so that one virtual cylindrical surface centering on the axis line X may be followed. More specifically, the central portion of the outer peripheral surface of the three convex portions 15 is completely along one virtual cylindrical surface, and both end portions of the central portion of the outer peripheral surface gradually approach the outer peripheral surface of the concave portion 17. As shown, the radius of curvature is small.

  The shape of the recess 17 is determined so as to satisfy the following two requirements.

  The first requirement is that the operator's finger holding the knob 7 can be locked in the vicinity of the convex portion 15 adjacent to the concave portion 17 in the counterclockwise direction (the other direction) when the knob 7 is viewed from the front. That is, the locking portion 19 is formed. The second requirement is that a locking portion that can lock an operator's finger is not formed between the convex portion 15 adjacent to the concave portion 17 in the clockwise direction (one direction) and the concave portion 17. It is.

  As shown in FIG. 3, the concave portion 17 of the present embodiment that satisfies the above conditions is formed on the portion of the convex portion 15 from the center of the concave portion 17 toward the convex portion 15 located on the clockwise direction (one direction) side. A curved portion 21 connected to the outer peripheral surface is formed. The curved portion 21 is gently curved so that the radius of curvature increases toward the convex portion 15. Therefore, the operator's finger easily slides on the curved portion 21 and moves to the convex portion 15. Therefore, the curved portion 21 does not constitute a locking portion. In contrast, the curved surface of the locking portion 19 gradually decreases in curvature radius from the center of the concave portion 17 toward the convex portion 15 located on the counterclockwise direction (the other direction) side, and then the radius of curvature decreases. It has a shape that rapidly decreases. In the present embodiment, the outer peripheral surface of the connecting portion 23 between the outer peripheral surface of the locking portion 19 and the outer peripheral surface of the adjacent convex portion 15 is also a curved surface.

  If the concave portion 17 that satisfies the above two requirements is formed in the knob 7, even if the operator rotates the knob 7 in the clockwise direction (one direction) and tries to fasten the screw portion 11 to the nut member 25 with a strong force, Since there is no locking portion for locking the finger in the clockwise direction (one direction) with respect to the concave portion 17, it is difficult to apply an extremely large rotational force to the shaft member 13 via the knob 7. On the contrary, when the operator rotates the knob 7 in the counterclockwise direction (the other direction) to loosen the screw portion 11 with respect to the female screw portion of the nut member 25, the operator rotates counterclockwise with respect to the concave portion 17. Since there is a locking portion 19 for locking the finger in the direction (the other direction), the operator can easily lock the knob 7 in the counterclockwise direction (the other direction) by locking the finger to the locking portion 19. Can be rotated.

  In this embodiment, in order to loosen the screw connection, in addition to the operator's two fingers (thumb and index finger), one finger (middle finger or ring finger) is also locked to the three locking portions 19. Thus, the knob 7 can be rotated with the greatest force in the counterclockwise direction (the other direction).

  FIG. 4 is a diagram showing a mechanism for adjusting the rotation angle of the handle 5 using the knobd component 1. Fixed to the front frame 4 is a fixing bracket 27 to which a nut member 25 having a female screw into which the male screw of the screw portion 11 is screwed is fixed. The nut member 25 has an elongated rectangular shape, and a female screw is formed at the center thereof. The fixing bracket 27 has a U-shaped cross section, and both ends of the fixing bracket 27 located in a direction orthogonal to the paper surface of FIG. 4 are open. The center portion of the handle 5 passes through the fixing metal 27. A contacted portion 6 having a hexagonal cross section is provided at the center of the handle 5. The fixing bracket 27 is housed in a frame-shaped mounting body 29. As shown in FIG. 5, a plate-like member 30 is fixed to the center of the front opening 29A of the mounting body 29 by welding. The plate-like member 30 is screwed with a screw 32 at the center portion of the leaf spring member 31. A through-hole 33 through which the screw portion 11 of the shaft member 13 passes is formed in the central portion of the leaf spring member 31. An end portion of the large diameter portion 13 </ b> A of the shaft member 13 having a diameter larger than the diameter of the through hole 33 is in contact with the central portion of the leaf spring member 31. As shown in FIG. 5, through the through holes (not shown) provided at both ends in the longitudinal direction of the leaf spring member 31, the fixing metal 27 shown in FIG. Two screws 34 are inserted. The two screws 34 are fixed to a nut member 25 fixed to a fixing bracket 27 through which the abutted portion 6 of the handle 5 passes. Further, both side walls in the longitudinal direction of the mounting body 29 (the direction in which the contacted portion 6 of the handle 5 extends) are provided with fitting recesses 35 that fit into the contacted portion 6 having a hexagonal cross section. The fitting member 37 is fixed. As shown in FIG. 6, twelve contact surfaces 39 that contact the outer peripheral surface of the contacted portion 6 are formed on the inner wall portion of the fitting recess 35. When the knob 7 is rotated clockwise, the shaft member 13 cannot move due to the presence of the plate-like member 30. Therefore, the nut member 25 moves in a direction approaching the plate-like member 30 as the shaft member 13 rotates. As a result, the shaft member 13 is moved forward relative to the nut member 25. When the nut member 25 approaches the plate-like member 30, the fixed fitting 27 and the contacted portion 6 of the handle 5 also approach the plate-like member 30 side. As a result, a plurality of corners formed on the outer peripheral portion of the abutted portion 6 are tightly fitted into a valley portion formed between two adjacent abutting surfaces 39 to abut on the abutted portion 6. Due to the strong contact with the surface 39, the rotation of the handle 5 is prevented. Conversely, when the knob 7 is rotated in the counterclockwise direction, the nut member 25 moves away from the plate-like member 30, and the contacted portion 6 of the handle 5 and the contact surface 39 of the fitting concave portion 35 are moved. The strong contact state is released. As a result, the handle 5 can be rotated. That is, when the knob 7 is rotated counterclockwise to loosen the screw connection, the urging force toward the plate member 30 is exerted on the nut member 25 due to the presence of the leaf spring member 31. Therefore, the nut member 25 is displaced together with the shaft member 13 to the plate-like member 30 side by this urging force, and the weak contact state between the contacted portion 6 and the contact surface 39 of the fitting recess 35 is maintained. The When a large force is applied to the handle 5 by the spring force of the leaf spring member 31 in this state and the handle 5 is rotated, the corner portion of the contacted portion 6 is formed at the boundary between two adjacent contact surfaces 39. The handle 5 can be rotated step by step over the section. The shaft member 13 protrudes outside the front panel 41 through a through hole 43 provided in the front panel 41. As a result of adopting such a structure, only the knob 7 is shown in FIGS. 1 (A) to (C).

  In the above-described embodiment, the number of the convex portions 15 and the concave portions 17 provided on the knob 7 is 3, but the number of the convex portions 15 and the concave portions 17 provided on the knob is determined by the diameter of the knob 7 by the operator. In addition, the concave portion 17 is naturally limited in accordance with the restriction that it is necessary to provide the locking portion 19 in which the operator's finger can be locked. 7A and 7B are a front view and a perspective view of a modified example of the knob 7 in which the number of convex portions 15 and concave portions 17 provided on the knob 7 is two. 8A and 8B are a front view and a perspective view of a modified example of the knob 7 in which the number of convex portions 15 and concave portions 17 provided on the knob 7 is four. For a person with an average hand size, the number of convex portions 15 and concave portions 17 is preferably 2, 3 or 4, respectively. In addition, when increasing the diameter of the knob for a person having a large hand size, it is possible to employ a number larger than the above number.

  The above embodiment is an example in which the knob-equipped part of the present invention is applied to a training bike. However, the knob-equipped part of the present invention is a position adjustment mechanism for other exercise machines, a position adjustment mechanism for an assembled bicycle, a valve. The operation member can be used for various purposes, and the use is not limited to this embodiment.

  Further, in the above embodiment, the screw portion 11 provided on the shaft member 13 is formed with a male screw. However, the screw portion 11 may be formed in a nut shape and the screw portion 11 may be formed with a female screw. In that case, a bolt member may be used instead of the nut member 25 described above.

(A) to (C) are a left side view, a rear view, and a rear view of a training bike for showing a state in which the knob-equipped component according to the embodiment of the present invention is used for adjusting the angle of the steering wheel handle. It is a partial expansion perspective view. (A) thru | or (C), the perspective view which looked at the part with a knob from the position of the diagonally upper right position, with the knob located in the front, the perspective view of the knob positioned backward and viewed from the diagonally upper right position, It is a rear view of components with a knob. It is a front view of a knob. It is a figure which shows the mechanism for adjusting the rotation angle of a handle using components with a knob. It is an external appearance perspective view of the mechanism which adjusts a rotation angle. It is a side view of a mounting body. (A) And (B) is the front view and perspective view of the modification of a knob when the number of the convex parts and recessed parts which are provided in a knob is each 2. (A) And (B) is the front view and perspective view of the modification of a knob when the number of the convex parts and recessed parts which are provided in a knob is set to 4, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Parts with a knob 3 Training bike 5 Handle 7 Knob 9 Saddle 11 Screw part 13 Shaft member 15 Convex part 17 Concave part 21 Locking part 21 Curved part 23 Connecting part 25 Nut member 27 Fixing bracket 29 Mounting body 30 Plate-like member 31 Plate spring Member 33, 43 Through hole 41 Front panel

Claims (7)

A shaft member having a threaded portion;
A knob fixed to one end of the shaft member and gripped by an operator's hand;
When the threaded portion provided on the shaft member rotates the shaft member in one direction around the axis of the shaft member, the shaft member is engaged with the threaded member to which the threaded portion is threaded. When the shaft member is rotated in the other direction opposite to the one direction around the axis, the shaft member moves backward relative to the screwed member. Is formed,
The knob has a plurality of convex portions that are convex toward the radially outer side of the shaft member and a plurality of concave portions that are concave toward the radially inner side of the shaft member alternately in the circumferential direction of the shaft member. There is a part with a knob having a shape formed on the outer periphery of the knob to appear,
The concave portion is formed with a locking portion capable of locking the operator's finger holding the knob in the vicinity of the convex portion adjacent to the concave portion in the other direction. A component with a knob, characterized in that it is determined so that the locking portion capable of locking the operator's finger is not formed between the convex portion and the concave portion adjacent in the one direction. The plurality of convex portions have the same shape and are formed at equal intervals in the circumferential direction,
The component with a knob according to claim 1, wherein the plurality of recesses have the same shape and are formed at equal intervals in the circumferential direction.   The component with a knob according to claim 1 or 2, wherein the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are formed by curved surfaces that are continuous with each other.   The component with a knob according to claim 3, wherein a main part of the curved surface constituting the outer peripheral surface of the plurality of convex portions is formed along one virtual cylindrical surface centering on the axis.   2. The knob-equipped component according to claim 1, wherein the plurality of convex portions and the plurality of concave portions are present in two, three, or four, respectively. A shaft member on which a screw portion of the other type screwed to one type of screw portion provided on the member to be screwed is formed;
A knob fixed to one end of the shaft member and gripped by an operator's hand;
When the other type of screw portion provided on the shaft member rotates the shaft member in one direction around the axis of the shaft member, the shaft member is relative to the threaded portion member. The shaft member is moved forward and rotated about the axis in the other direction opposite to the one direction, so that the shaft member moves backward relative to the screwed member. Has been
In the circumferential direction of the shaft member, there are three convex portions that are convex toward the radially outer side of the shaft member and three concave portions that are concave toward the radially inner side of the shaft member. A component with a knob having a shape formed on the outer periphery of the knob to appear alternately,
The three convex portions have the same shape and are formed at equal intervals in the circumferential direction,
The three concave portions have the same shape and are formed at equal intervals in the circumferential direction,
The concave portion is formed with a locking portion capable of locking the operator's finger holding the knob in the vicinity of the convex portion adjacent to the concave portion in the other direction. A component with a knob, characterized in that it is determined so that the locking portion capable of locking the operator's finger is not formed between the convex portion and the concave portion adjacent in the one direction. The outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are formed by curved surfaces that are continuous with each other,
The component with a knob according to claim 6, wherein a main portion of the curved surface constituting the outer peripheral surface of the plurality of convex portions is formed along one virtual cylindrical surface centering on the axis.