CN216596902U

CN216596902U - Bow body for fiddle bow

Info

Publication number: CN216596902U
Application number: CN202123273435.8U
Authority: CN
Inventors: 秦剑江
Original assignee: Suzhou Xiangcheng Taiping Musical Instrument Fittings Factory
Current assignee: Suzhou Xiangcheng Taiping Musical Instrument Fittings Factory
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-24
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses a bow for bow has the bow pole body, bow pole body front end constitutes the bow, and the bow surface has the first recess of horizontal setting, and the bow pole tail end is equipped with the second recess that is used for connecting the tail storehouse and the through-hole of wearing to establish with the confession locking screw of second recess intercommunication, its characterized in that: the middle of the bow rod body is provided with a long-strip-shaped cavity, the bow rod body is composed of two independent half bow rods by taking a symmetrical surface along the length direction as a boundary surface, long grooves are respectively arranged on the opposite surfaces of the two half bow rods, the opposite surfaces of the two half bow rods are fixedly connected by welding, and the two long grooves are spliced to form the long-strip-shaped cavity. The utility model discloses constitute by two half bow-rod welding, can conveniently adopt the combined material pouring preparation based on short carbon fiber polyester, avoided loosing core to mould plastics the mandrel unstability that probably causes, off tracking broken wall scheduling problem.

Description

Bow body for fiddle bow

Technical Field

The utility model relates to an accessory of a stringed instrument, in particular to a bow of the stringed instrument, in particular to a bow body of the bow.

Background

Stringed musical instruments are common instruments in both chinese and western musical instruments, such as violins, erhu's, and the like. The bows are used when the stringed instrument is played. The bow generally includes bow body, bow hair, tail storehouse and screw, and the front end of bow body forms the bow, is equipped with the recess that is used for fixed bow hair on it, and the tail end connection adjustable position's of bow body tail storehouse, bow hair setting are between the recess of bow and tail storehouse, adjust the tensioning degree of bow hair through the position of adjusting the tail storehouse.

In the prior art, the bow body is generally made of wood with high elasticity. Due to the limitation of wood resources, bow bodies made of polyester materials reinforced with carbon fibers began to appear. However, the carbon fiber reinforced material has high density, and needs to be made into a hollow structure in order to meet the weight requirement of the bow body. For example, chinese utility model CN2530318Y discloses a bow stick internal structure of a bow, which is a hollow laminated structure formed by a rod body with a hollow inner layer, a multi-layer mesh structure layer alternately coated on the outer layer of the rod body and having a thickness of 0.1-0.2mm, and a homodromous structure layer. In actual manufacturing, the structure needs to be wrapped and coated by long carbon fiber cloth in a multi-layer winding mode, the manufacturing process is complex, and the control difficulty of the bow shape is high.

However, if polyester reinforced materials (such as ABS, PC, etc.) based on short carbon fibers are used, one-step forming is usually required, a mold is required to be disposed in the hollow position of the bow body for casting, and in this process, the conditions such as internal mold deviation are likely to occur, which causes the wall thickness of the bow body to be inconsistent, and affects the quality of the bow. Therefore, the bow body made of the short carbon fiber composite material with the integrated structure is difficult to manufacture.

How to improve the bow body structure to overcome the defects is a problem when the short carbon fiber polyester reinforced material is applied to a bow.

Disclosure of Invention

The invention aims to provide a bow body for a musical instrument bow, which is suitable to be made of short carbon fiber/ABS or PC composite reinforced materials.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows: the utility model provides a bow for bow has the bow-rod body, bow-rod body front end constitutes the bow, and the bow surface has the first recess of horizontal setting, and the bow-rod tail end is equipped with the second recess that is used for connecting the tail storehouse and the through-hole of wearing to establish with the confession locking screw of second recess intercommunication, bow-rod body central authorities have rectangular form cavity, and the bow-rod body uses the plane of symmetry along length direction to constitute by two independent half bow-rods for the interface, has the elongated slot on two half bow-rod relative faces respectively, and two half bow-rod relative faces welded fastening connect, and two amalgamation elongated slots constitute rectangular form cavity.

Among the above-mentioned technical scheme, the bow pole body comprises two half bow poles, and first recess, second recess, the through-hole that supplies the locking screw to wear to establish, rectangular form cavity are all equallyd divide on one side surface of two half bow poles, consequently, can directly make half bow pole mould, adopt short carbon fiber ABS combined material to pour into a mould and obtain half bow pole, also can adopt short carbon fiber PC combined material, perhaps directly adopt the PC material. After the two half bow rods are aligned, the whole bow rod body can be formed by adopting a mode of ultrasonic welding and the like.

According to the preferable technical scheme, the distance between the front end of the long-strip-shaped cavity and the end part of the bow head is 80-110 mm, and the tail end of the long-strip-shaped cavity is separated from a through hole for the locking screw to be arranged in an empty mode.

According to the preferable technical scheme, the distance between the tail end of the long-strip-shaped cavity and the tail end of the bow rod body is 90-110 mm.

In the technical scheme, the thinnest part of the cavity wall of the long-strip-shaped cavity is 1-1.2 mm in thickness. The length of the cavity and the thickness change design of the cavity wall are determined according to the requirements of the prepared bow on weight, hardness elasticity and gravity center position. Because the models of the existing various fiddle bows have conventional conventions, the length and the structure of the cavity can be adjusted in an increasing and decreasing mode according to the model specifications of the fiddle bows.

According to a further technical scheme, the surface of the bow rod body is coated with a paint layer.

According to the other technical scheme, the surface of the bow rod body is coated with a heat-shrinkable sleeve. The heat shrinkable sleeve can be selected to be different colors according to requirements.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. the utility model discloses creatively separates the bow body of the musical instrument into two and half bow poles, comprises two and half bow pole welding, from this, can conveniently adopt pouring preparation such as combined material, PC material based on short carbon fiber ABS, has avoided loosing core and has moulded plastics the mandrel unstability that probably causes, off tracking broken wall scheduling problem.

2. The utility model discloses well musical instrument bow's various functional slotted holes can be in integrative preparation when the die sinking, do not need follow-up processing, have improved preparation efficiency, can conveniently adjust the cavity shape according to the performance requirement of musical instrument bow simultaneously.

Drawings

FIG. 1 is a schematic external view of an embodiment of the present invention;

FIG. 2 is a schematic view of a semi-arcuate rod according to one embodiment;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

FIG. 4 is a cross-sectional profile view of the bow rod body of the first embodiment;

fig. 5 is a cross-sectional profile view of the bow rod body of the second embodiment.

Wherein: 1. a bow head; 2. a first groove; 3. a second groove; 4. a through hole; 5. a tail library; 6. a strip-shaped cavity; 7. welding a surface; 8. and (4) heat-shrinkable tubing.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the first embodiment is as follows: referring to fig. 1, a bow for bow has the bow pole body, bow pole body front end constitutes bow 1, and the bow head surface has the first recess 2 (or be called the head eye) of horizontal setting, and the bow pole tail end is equipped with the second recess 3 (or be called rectangular hole) that is used for connecting tail storehouse 5 and the through-hole 4 (or be called the tail hole) that supplies the locking screw to wear to establish with second recess intercommunication, and bow pole body central authorities have rectangular form cavity 6.

The bow rod body is formed by two independent half bow rods by taking a symmetrical plane along the length direction as a boundary surface, referring to fig. 2 and 3, the first groove 2, the second groove 3, the through hole 4 for the locking screw to penetrate through and the long-strip-shaped cavity 6 are uniformly distributed on one side surface of the two half bow rods.

The opposite surfaces of the two half bow rods are fixedly connected by welding, referring to fig. 4, after the welding surfaces 7 between the two half bow rods are mutually jointed, the two half bow rods are fixedly connected by ultrasonic welding, and at the moment, the two long grooves are spliced to form the strip-shaped cavity 6.

When the finished bow is assembled, the bow hair is fixed between the first groove and the tail storage.

In this embodiment, the size of the bow body is designed according to the requirements of the bow to be manufactured. For example, an 4/4 violin bow may be made with an overall length (without screws) of 73cm, a bow height of about 17mm, a tail thickness of about 8.8mm, a middle thickness of about 8mm, and a neck thickness of about 6.5 mm. The bow rod is made of ABS composite material with 15% of short carbon fiber, the distance between the front end of the cavity and the end part of the bow head is about 100mm, the distance between the rear end of the cavity and the tail end of the bow rod is about 100mm, the wall thickness of the cavity is 1.2mm, two half bow rods are respectively made, and the two half bow rods are fixedly connected and formed by adopting a 40 kilowatt ultrasonic welding machine. Tests show that the weight of the bow body is about 40 g, the transmission speed is about 5000, the bow meets the requirements of a piano bow, and the weight of the finished bow assembled into the finished bow is about 62 g.

In this embodiment, a PC composite material with short carbon fibers may also be used, or a PC material may be directly used, and the size of the cavity may be appropriately adjusted according to the density of the material. The proper material can be tested and selected according to the professional characteristics required by the fiddle bow.

Example two: referring to fig. 2, the bow is made by the same method as the embodiment, the wall thickness of the cavity is 1.1mm, the body of the bow is sleeved with a hard thin-wall shrinkable sleeve, and after baking, the shrinkable sleeve 8 is tightly attached to the surface of the bow rod as shown in fig. 5. Different appearance effects can be obtained by adopting the heat-shrinkable sleeves with different colors, and meanwhile, the reliability of the bow body is enhanced.

Claims

1. The utility model provides a bow for bow has bow pole body, bow pole body front end constitutes the bow, and the bow surface has the first recess of horizontal setting, and the bow pole tail end is equipped with the second recess that is used for connecting the tail storehouse and the through-hole of wearing to establish with the confession locking screw of second recess intercommunication, its characterized in that: the middle of the bow rod body is provided with a long-strip-shaped cavity, the bow rod body is composed of two independent half bow rods by taking a symmetrical surface along the length direction as a boundary surface, long grooves are respectively arranged on the opposite surfaces of the two half bow rods, the opposite surfaces of the two half bow rods are fixedly connected by welding, and the two long grooves are spliced to form the long-strip-shaped cavity.

2. The body for a fiddle bow according to claim 1, wherein: the distance between the front end of the long-strip-shaped cavity and the end part of the bow head is 80-110 mm, and the tail end of the long-strip-shaped cavity is separated from a through hole for the locking screw to be arranged in an empty mode.

3. The body for a fiddle bow according to claim 1, wherein: the distance between the tail end of the long-strip-shaped cavity and the tail end of the bow rod body is 90-110 mm.

4. The body for a fiddle bow according to claim 1, wherein: the thickness of the thinnest part of the cavity wall of the long-strip-shaped cavity is 1-1.2 mm.

5. The body for a fiddle bow according to claim 1, wherein: the surface of the bow rod body is coated with a paint layer.

6. The body for a fiddle bow according to claim 1, wherein: the surface of the bow rod body is coated with a heat-shrinkable sleeve.