JPS6333263Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a foot pedal for drums.

Generally, foot pedals for drums are usually connected to a swinging member that rotates together with the beater by a belt such as a leather band. From the point of view of
For example, as seen in U.S. Pat. No. 3,797,356, the swinging member is constituted by a sprocket,
A structure in which this and the end of the pedal are connected by a chain is preferred.

This sprocket and chain connection structure prevents the mounting hole from turning into a long hole or the belt itself stretching during use, unlike leather belts, and also allows the pedal to be easily adjusted to any position. It has great performance advantages, such as being able to stop or hold it at any point.

However, in this structure, since the sprocket is used, the rotation of the swinging member tends to be large, the distance the Ikioi beater moves is also long, and inertia works during swinging, making it difficult to beat continuously with fine beats. It was pointed out that the problem was that the fatigue was greater than in other cases.

This invention was proposed in order to improve such problems in foot pedals with this type of chain connection structure, and its gist is that the swinging member for the beater and the pedal tip are A foot pedal for a drum connected by a chain, characterized in that the rotation axis of a swinging member having a gear portion that meshes with the chain is shifted upward and rearward from the center of the tooth tip of the gear. .

Embodiments will be specifically described below according to embodiments shown in the accompanying drawings.

Fig. 1 is an overall side view with a part of the drum foot pedal of this invention cut away, Fig. 2 is a front view thereof, and Fig. 3 is an illustration of the operation of the swinging member when the beater is struck. FIG. 4 is a side view showing another embodiment of the swinging member.

As shown in FIGS. 1 and 2, the drum foot pedal 10 of this invention has columns 12, 12 erected on both sides of a base 11, and ball bearings 13, 13 are mounted on the tops of the columns. rotation axis 1
5 is constructed, and a beater mounting member 16 and a swinging member 20 that rotates together with the beater mounting member are fixed to approximately the center of this rotating shaft 15. A beater 19 having a pad 18 at its tip is integrally attached to the beater attachment member 16.

On the other hand, a heel 31 is disposed at the rear of the base 11, and the heel 31 and the pillars 12, 12 are connected by bending arms 32, 32,
A pedal 30 is connected to the base of the heel 31 by an axle pin 33.

The pedal 30 is connected to the chain 28 via an L-shaped block 41 at its distal end 29, and the pedal force of the pedal 30 rotates the swinging member, so that the beater 19 is connected to the drum surface D. It is configured to strike. In addition, the reference numeral 42 in FIG. 1 is a slit provided in the L-shaped block 41, and the chain is fitted along the slit. 43 is a machine screw, and 44 is a fixing bolt for the L-shaped block 41.

In addition, as shown in FIG.
A return coil spring 37 is connected to the fan-shaped plate 34 fixed to one end of the rotating shaft 15 on the outside of the rotary shaft 15, and the pedal 30 is configured to automatically return to its original position by the spring. ing. Reference numeral 35 is a lower bracket, and 36 is a bolt for adjusting the tension of the return coil spring 37.

Next, referring to the characteristic configuration of this invention, the swinging member 20 in this invention has teeth 22 that mesh with the chain 28, as is clear from the enlarged side views of FIGS. 3 and 4. The center of rotation of the rocking member 20, that is, the rotation axis 15, which has the gear portion 21 having a
2. It is provided so as to be offset from the center O of 2 toward the rear and upper side.

In addition, in the example, the swinging member is shown as a partial gear instead of a full gear in order to prevent the occurrence of gearing noise and to reduce the size and weight.
Of course, it goes without saying that a full gear (sprocket) as shown in FIG. 3 may be used.

In FIG. 1, reference numeral 24 represents a notch for adjusting the weight of the swinging member, 26 represents a length adjustment/fixing bolt for the chain 28, and 27 represents a chain presser cover.

In this invention, the center of rotation of the swinging member 20, that is, the rotation axis 15, is shifted rearward and upward from the center O of the tooth tip 22 of the gear portion 21 for the following reason.

That is, in FIG. 3 or 4, the center of the tooth tip 22 of the gear portion 21 is indicated by the symbol O, and the rotation locus about this O is indicated by a chain line M.
The movement locus of a conventional sprocket coincides with the chain line M. In this invention, the center of rotation, that is, the rotation axis 15 is shifted rearward and upward from the center O of the tooth tips 22 of the gear portion 21, so that the movement trajectory M
By rotating the swinging member 20 inside the drum, the beater is caused to swing closer to the drum surface.

In other words, as can be better understood from FIG. 3, by making the rotating shaft 15 of the swinging member 20 eccentric to the rear and upper side from the rotation center O of the gear, the swinging of the swinging member 20 is caused to move toward the drum surface D. The moving distance N of the beater 19 is shortened by making the distance N smaller than that of the beater 19.

In FIG. 3, the solid line indicates the position of the swinging member 20 having the eccentric shaft 15 when the swinging member 20 is struck, and the broken line indicates the striking position when the rotation center O of the gear is set as the rotation axis without eccentricity. When the distance between the drum surface D and the front end of the swinging member 20 during striking is both S,
The moving distance N of the beater is shortened by a portion T as shown in the figure.

In this way, this invention solves the problem of the large rotation of the rocking member, the long travel distance of the beater, the generation of inertia during rocking, and the performance problems caused by the use of a sprocket in a foot pedal with a chain-connected structure. This greatly improves problems such as human fatigue,
We were able to improve its operability.

Furthermore, if the swinging member 20 is further constructed from a partial gear as in the embodiment, first of all, the meshing between the swinging member and the chain will be reduced, and the occurrence of meshing noise can be prevented as much as possible. At the same time, secondly, the swinging member can be made smaller and lighter.

Incidentally, the problem of the meshing sound between the swinging member and the chain is as shown in FIG.
The chain portion 28A that meshes with the swinging member 21
By arranging it so that it does not come off the tooth 22 within the swing angle range R,
It can be completely prevented.

[Brief explanation of the drawing]

Fig. 1 is an overall side view with a part of the drum foot pedal of this invention cut away, Fig. 2 is a front view thereof, and Fig. 3 is an illustration of the operation of the swinging member when the beater is struck. The side view shown in FIG. 4 is a side view similarly showing an example of a swinging member of another embodiment. 10... Foot pedal for drum, 11... Base, 12... Support, 15... Rotating shaft, 19... Beater, 20... Rocking member, 21... Partial gear, 2
2...teeth, 28...chain, 30...pedal,
N... Distance traveled by the beater, O... Center of the tooth tip of the gear, R... Rocking angle of the swinging member.

Claims (1)

[Scope of utility model registration request] In a drum foot pedal in which a swinging member for a beater and a pedal tip are connected by a chain, the rotating shaft of the swinging member having a gear portion that meshes with the chain is set at the center of the tooth tip of the gear. A foot pedal for drums characterized by being positioned further toward the rear and upward.