JP4097928B2 - metronome - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, the pendulum is vibrated at a predetermined frequency by the driving force from the driving source, and a rhythm forming unit is provided in the transmission wheel train from the driving source. The present invention relates to a metronome that forms a desired rhythm by a bell.
[0002]
[Prior art]
In such a metronome configuration, a pendulum is provided so that the pendulum can be moved, the pendulum is moved to select the frequency, and the pendulum vibration is controlled by a relief plate provided on a wheel in the transmission train wheel. Supports the switching member in a swingable manner, attaches a hammer to the meter switching member, abuts the tip of the hammer on the rhythm forming part, and swings the meter switching member to switch the position of the hammer to the rhythm forming part. The rhythm is selected. Since the rhythm is selected by the user, the operation member for swinging the timepiece switching member protrudes outward from the outer case of the metronome. Therefore, it is difficult to mount the machine body in the exterior case with the operation member fixed to the machine body side. For this purpose, the insertion side end of the operation member is inserted from the outside of the opening of the exterior case into the inside, and is connected to the timepiece switching member on the machine body side by screwing.
[0003]
[Problems to be solved by the invention]
In such a configuration, while the user repeats the operation of holding the outer end portion of the operation member and moving it to the left and right to swing the timepiece switching member, the operation member rotates and the connection by the screw is performed. The problem of coming off arises. Once the operating member is detached, it is difficult to perform mutual alignment with the beat switching member from the outside of the exterior case even if it is screwed again for connection, and there is a problem that reconnection cannot be performed. Further, since the operation member is a small part, there is a problem that it is lost.
[0004]
Therefore, according to the present invention, after the operation member is connected in the assembly process of the metronome, even if the user repeatedly uses it for selecting a rhythm, the connection is not disconnected.
[0005]
[Means for Solving the Problems]
Therefore, the metronome according to the present invention vibrates at a desired frequency via a drive source, a transmission wheel train that transmits the driving force from the drive source, a frame that supports the transmission wheel train, and the transmission wheel train. A pendulum, a rhythm forming unit provided in the transmission wheel train, a phosphorus controlled by the rhythm forming unit to be beaten at a desired rhythm, and a beat switching member for selecting the desired rhythm, The timepiece switching member includes an operation member inserted from a guide hole provided in the exterior case after the mechanical body and the exterior case are combined. The operation member is a connecting means for connecting the inner end portion to the swing end side of the time signature switching member after the inner end portion is inserted from the guide hole provided in the outer case. Is provided The binding means, elastically deform, the locking pawl for locking said meter switching member and the operating member is provided, is characterized in that. With this configuration, once assembled, even if the user repeatedly uses the operation member for selecting a rhythm, the connection with the time switching member is not disconnected, and the user can continue to use it with peace of mind. Is possible.
[0006]
The outer case is provided with a time scale along the guide hole, and the operation member has an operation knob at an end located outside the outer case and an instruction to project the time scale by projecting from the operation knob. It is preferable that a protrusion is provided. This configuration makes it easy to select a rhythm.
[0007]
The operation member is preferably provided with a stepped portion for preventing erroneous insertion.
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described.
[0009]
3 and 6 to 8 show the structure of the metronome machine. The frame 1 is bent at a right angle, and includes a horizontal portion 1A and a vertical portion 1B, and a pendulum attachment portion 1C formed by bending a hole at the front end of the horizontal portion 1A. A second frame 2 facing the vertical portion 1B in parallel at a predetermined interval is fixed to the horizontal portion 1A by screws 2a and 2b.
[0010]
The transmission wheel train for driving the pendulum is pivotally supported by the vertical portion 1B and the second frame 2. That is, the mainspring 3 is used as a drive source, the winding shaft of the mainspring 3 is the first shaft 4, and both ends of the mainspring 3 are rotatably supported by the vertical portion 1B and the second frame 2 that face each other in parallel. A first gear 5 is pivotally supported on the first shaft 4. The second shaft 6 is rotatably supported by the vertical portion 1B and the second frame 2, and the second shaft 6 is provided with a second pinion 7 so as to be able to mesh with the first gear 5 and the second gear 8 is pivoted. I support. The third shaft 9 is rotatably supported by the vertical portion 1B and the second frame 2 and a third pinion 10 is provided on the third shaft 9 so as to be able to mesh with the second gear 8. A wheel 11 is provided on the third shaft 9 so as not to rotate and to be movable in the axial direction. The wheel 11 has a cylindrical shape sandwiched between the flange portions 11a and 11b. The cylindrical portion protrudes outwardly at a central angle of 180 degrees on both sides divided in the axial direction. A relief plate 11c on the collar part 11a side and a relief plate 11d on the collar part 11b side are provided. In order to position the wheel 11 in the axial direction, a pair of positioning plates 12a and 12b are suspended from the horizontal portion 1A, and the collar portions 11a and 11b are sandwiched from the outside.
[0011]
The pendulum shaft 13 is pivotally supported in a horizontal state and rotatable in the front-rear direction by a bearing 13b provided in the mounting portion 1C and a bearing (not shown) fixed to the horizontal portion 1A. A pendulum receiver 14 is fixed near the front end of the pendulum shaft 13, and a pendulum 15 is fixed to the pendulum receiver 14. Further, the pendulum shaft 13 is provided with a pendulum pin (not shown) that protrudes in the radial direction toward the middle of both escape plates 11 c and 11 d of the wheel 11. By alternately engaging, the pendulum 15 is driven to swing. The pendulum 15 is provided with a free weight 16 at a position above the pendulum receiver 14 so as to be movable up and down. A fixed weight 17 is provided by a pin 18 at the lower end of the pendulum 15. The pendulum 15 can be vibrated at a desired frequency by moving the free weight 16 up and down to a desired position. As shown in FIG. 7, a winding wedge 19 and a winding gear 20 are provided in the vicinity of the protruding portion of the first shaft 4 from the second frame 2.
[0012]
As shown in FIG. 6, a time signature switching member 21 is pivotally supported on the vertical portion 1B so as to be swingable. That is, it engages with the vertical portion 1B at the upper position of the time signature switching member 21, and the time signature switching member 21 is swingable with the engaging portion as a swing center. The edge 1d at the lower end of the vertical portion 1B has an arc shape concentric with the center of swing, and a guide protrusion 21a (shown in FIG. 3) provided at the lower end of the time signature switching member 21 guides the arc-shaped edge 1d of the vertical portion. It is supposed to be. The vertical portion 1B is provided with an arc-shaped long hole 1e parallel to the arc-shaped edge 1d. A connection hole 21b of an operation member 45 to be described later is provided at the lower end of the time signature switching member 21. A phosphorus 22 is fixed to the upper end portion of the time signature switching member 21 with a screw 23. A hitting ball 24 for hitting the phosphorus 22 is provided at the upper end of the hammer plate 25. The hammer plate 25 has a pin 25a as a swing center protruding in the width direction of the hammer plate, and the pin 25a is pivotally supported on the timepiece switching member 21 so as to be swingable. The lower end portion of the hammer plate 25 is stretched to form a time selection portion 25b.
[0013]
Next, a mechanism for selecting the time signature to beat is described. The timepiece switching member 21 is provided with a window hole 21c facing the long hole 1e of the vertical portion 1B. The timepiece selection part 25b of the hammer plate 25 passes through the window hole 21c and passes through the long hole 1e. The second gear 8 is in contact with the side surface. The side surface of the second gear 8 is a rhythm forming portion 8a. For example, when the phosphorus 22 is beaten every first beat of the rhythm such as 2 beats, 3 beats, 4 beats, 6 beats, etc., on the same circumference The recesses 8b are formed at predetermined intervals. Specifically, as shown in FIG. 6, one concave portion 8b and one flat surface having the same central angle so as to strike the first beat of two beats on the outermost circumference of four concentric circumferences. Plural pairs are aligned with the surface (rhythm forming portion) 8a as a pair. A plurality of pairs of one concave portion and two flat surfaces (rhythm forming portions) are aligned as a pair so as to beat the first beat of three beats on the circumference next to this. A plurality of pairs of one concave portion and three flat surfaces (rhythm forming portions) are aligned as a pair so that the first beat of four beats is beaten on the circumference next to this. A plurality of pairs of one concave portion and five flat surfaces (rhythm forming portions) are aligned on the innermost circumference so as to beat the first beat of six beats. The central part is an area that is not provided with a recess, and is an area that is selected when no beat is applied. When the time signature switching member 21 is swung, the hammer plate 25 is swung together, and the time selection portion 25b moves along the long hole 1e. A desired rhythm can be selected by making the tip abut on a desired circumferential position of the rhythm forming portion 8a.
[0014]
Thus, in the configuration in which the play weight 16 is moved to select the frequency, and the beat switching member 21 is swung to select a desired rhythm, the initial position of the wheel 11 and the initial position of the second gear 8 during assembly. Must match. That is, the initial position of the wheel 11 is a position where the pendulum pin is engaged with one of the relief plates 11c or 11d of the wheel 11, and the initial position of the second gear 8 is determined by the time signature selection unit 25b. This is the position immediately before contacting the first beat recess of the forming portion 8a. If the relative positional relationship between the two initial positions is matched during assembly, the first beat can be beaten immediately after starting.
[0015]
Therefore, a through hole for positioning the second gear 8 and the wheel 11 at the initial position is provided in advance between the second gear 8, the wheel 11, and the vertical portion 1B. That is, one through hole (not shown) is provided in the wheel 11, and the first positioning through hole 30b (shown in FIG. 6) is provided in the vertical portion 1B at a position facing the through hole at the initial position of the wheel 11. Provide. The second gear 8 is provided with one through hole (not shown), and the vertical portion 1B has a second positioning through hole 31b at the initial position of the second gear 8 at a position facing this through hole. (Shown in FIG. 6) is provided. When assembling, one pin passes through the wheel through hole from the first positioning through hole 30b, and the other pin passes through the gear through hole from the second positioning through hole 31b. The shaft 6 and the third shaft 9 are pivotally supported by the vertical portion 1 </ b> B and the second frame 2. After that, if the pin is pulled out, the relative positional relationship between the initial position of the wheel 11 and the initial position of the second gear 8 can be adjusted, and once assembled, the relative positional relationship between the initial positions will not be shifted. . What is necessary is just to perform as usual, when assembling the 1st axis | shaft 4, phosphorus 22 grade | etc.,.
[0016]
As shown in FIGS. 1 and 2, the outer case of the metronome is formed by connecting an upper lid 41 and a lower lid 42 by appropriate means such as screwing or so-called patching. An opening 41a for penetrating the pendulum 15 and exposing it to the front surface is formed. A frequency display plate 43 whose frequency is displayed on the front surface is fixed to the front surface of the upper lid 41, and a fixing portion 44 for fixing the upper end of the pendulum 15 is provided on the upper end portion thereof. In addition, a guide hole 41b is provided on the left surface of the upper lid 41. An operation member 45 for swinging and driving the time signature switching member 21 is inserted and moved to the left and right. A time scale 41c such as double time or triple time is provided along the upper side of the guide hole 41b. An opening 41d (shown in FIG. 3) is provided on the right surface of the upper lid 41 at a position facing the first shaft 4 that is the winding shaft of the mainspring 3 so that the winding member 46 of the mainspring 3 can be inserted. The connection between the first shaft 4 and the winding member 46 is a screw connection around the winding direction of the mainspring 3. On the lower surface of the lower lid 42, three projections are formed, which are two front legs 42a and one rear leg 42b.
[0017]
As shown in FIG. 4, the operation member 45 has an operation knob 45 a at an end portion (left end portion) located outside the outer case 41, and the connecting shaft portion 45 b extends toward the inner side of the outer case. In the upper half of the operation knob 45a, an instruction projection 45c capable of indicating the time scale 41c is provided. On the inner end portion (right end portion) of the connecting shaft portion 45b, that is, on the insertion side end portion of the outer case 41 into the guide hole 41b, a step portion 45d having a notched upper surface for preventing erroneous insertion of the operation member is provided. is there. Further, the inner end portion is given elasticity by the split groove 45e, and a locking claw portion 45f that is locked to the timepiece switching member 21 by being elastically deformed is provided at the tip thereof. The stepped portion 45d may be a stepped portion that bulges regardless of the notch.
[0018]
The machine body of the metronome configured as described above is inserted into the upper lid 41 of the exterior case, and the operation member 45 is connected to the connection hole 21b of the time signature switching member 21. At this time, as shown in FIG. 5, the connecting shaft portion 45b of the operating member 45 is inserted through the guide hole 41b with the stepped portion 45d positioned upward (posture in FIG. 4A), and the inner end portion is inserted. Press fit into the connecting hole 21b. The inner end portion is elastically deformed and passes through the connecting hole 21b, and is elastically deformed when passing through the connecting hole, and the locking claw portion 45f is locked to the edge of the connecting hole 21b. The indicator protrusion 45c is positioned above to indicate the time scale 41c (shown in FIG. 1). Therefore, since the rhythm can be easily confirmed, rhythm selection becomes easy. When the connecting shaft 45b is inserted from the guide hole 41b, if the step 45d is positioned below and the step 45d is to be inserted, the step 45d comes into contact with the protrusion 21d provided below the connecting hole 21b, and the inner end Since the portion cannot be inserted into the connecting hole 21b, it is not inserted in the wrong posture. In the wrong posture, the indicator protrusion 45c points downward and cannot indicate the time scale 41c.
[0019]
Next, the main shaft 4 is positioned so as to oppose the opening 41d, and the mainspring winding member 46 is inserted from the opening 41d, rotated in the mainspring winding direction, and screwed onto the first shaft 4. Thereafter, the lower lid 42 is joined to the upper lid 41 to complete the assembly of the metronome.
[0020]
The operating member 45 can be locked even if the locking claw portion 45f is locked in the connecting hole 21b once and the rhythm selection operation is performed by moving the operating knob 45a left and right along the guide hole 41b. The operation member 45 is not detached from the timepiece switching member 21 by the claw portion 45f.
[0021]
Further, when the machine body is taken out from the outer case 41 for repair or the like, the operation member 45 can be easily removed by elastically deforming the latching claw portion 45f with tweezers or the like.
[0022]
In use, the weight 16 is moved up and down to determine the frequency, the timepiece switching member 21 is swung by the operation member 45, and the timepiece selection unit 25b selects a desired rhythm of the rhythm formation unit 8a, for example, 3 timelines. In this case, the position is adjusted to a position where the second outermost circumference is in contact with the circumference. When the swing of the pendulum 15 is started, the wheel 11 that has been prevented from rotating by the contact of the escape plate 11c or 11d until then can be rotated, and the driving force of the mainspring 3 is changed to the first gear 5, It is transmitted to the wheel 11 through the second pinion 7, the second gear 8, the third pinion 10, and rotates. While the rotation is transmitted to the wheel 11, the second gear 8 starts to rotate. At this time, the time signature selection portion 25 b falls into the recess 8 c, and the hammer plate 25 swings around the pin 25 a, and the tip of the hammer plate 25. The hit ball 24 hits the phosphorus 22 and hits the first beat. The first beat ends when the pendulum pin comes into contact with the next relief plate 11d or 11c. Therefore, the pendulum 15 starts swinging in the opposite direction and enters the second beat. In this manner, the pendulum 15 swings left and right for each beat, and a rhythm that matches the frequency is formed by striking the first beat of the rhythm.
[0023]
【The invention's effect】
Thus, according to the present invention, the time signature switching member is driven via the operation member inserted from the guide hole provided in the exterior case, and the operation member has an insertion side end to the guide hole, Since it is elastically deformable and has a locking claw that is locked to the timepiece switching member by insertion into the guide hole, once assembled, the user repeats the operation member for rhythm selection Even if it is used, the connection between the timepiece switching member and the operation member is not disconnected, and it can be used continuously with peace of mind.
[Brief description of the drawings]
FIG. 1 is a left side view showing an embodiment of the present invention.
FIG. 2 is a front view of FIG. 1;
3 is a front view of a metronome machine body in which the upper lid and the lower lid of FIG. 2 are cut away. FIG.
4A is a front view of an operation member, and FIG. 4B is a plan view thereof.
FIG. 5A is a front view showing a state in which the operation member is connected to a connection hole of a time change member, and FIG. 5B is a plan view thereof.
FIG. 6 is a left side view of a metronome mechanical body.
FIG. 7 is a right side view of a metronome machine.
FIG. 8 is a plan view of a metronome mechanical body.
[Explanation of symbols]
1 Frame 3 Drive source (spring)
5, 7, 8, 10, 11 Transmission wheel train 8a Rhythm forming part 15 Pendulum 21 Time signature switching member 22 Lin 41 Exterior case (upper cover)
41b Guide hole 41c Time scale 45 Operation member 45a Operation knob 45c Indicating protrusion 45d Step 45f Locking claw

Claims (1)

A drive source, a transmission wheel train that transmits a driving force from the drive source, a frame that pivotally supports the transmission wheel train, a pendulum that vibrates at a desired frequency via the transmission wheel train, and the transmission wheel A machine body comprising: a rhythm forming section provided in a row; a phosphorus controlled by the rhythm forming section to be struck by a desired rhythm; and a time change switching member that selects the desired rhythm. Stored in the case,
The time signature switching member is operated through an operation member inserted from a guide hole provided in the exterior case after the mechanical body and the exterior case are combined.
After the inner end portion is inserted from the guide hole provided in the outer case, the inner end portion is connected to the swing end side of the time signature switching member.
The inner end is elastically deformed and is provided with a locking claw for locking the operation member and the timepiece switching member.
A metronome characterized by that.

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