Piano with uniformly stressed back frame

Abstract

The utility model provides a piano with a back frame uniformly stressed, which comprises a piano main body, back plates I, back plates II and back plates III, a group of back plates I are arranged above the front surface of the piano main body, a group of back plates III are arranged below the back plates I, and a group of back plates II are arranged below the back plates III. Compared with the prior art, the beneficial effects of the utility model are that through the arrangement of the first insertion block, the second insertion block, the first slot, the second slot, the first shock absorber and the second shock absorber, the rigid connection among the first back plate, the second back plate and the third back plate can be reduced, the vibration of the piano during playing is weakened, the pressure borne by the back frame is reduced, and the sound distortion caused by the deformation of the main body structure of the piano is prevented; through the arrangement of the first sliding strip, the second sliding strip, the first sliding groove and the second sliding groove, the first back plate and the third back plate can be connected, so that disassembly is convenient, use is flexible, through the arrangement of the first sound amplification hole and the second sound amplification hole, sound generated when a piano is played can be amplified, and the expression degree of the sound of the piano is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of piano back frames, and particularly relates to a piano with a back frame that is evenly stressed. Background Art

[0002] The piano back frame is a structural component located on the back of the piano body. As the support and bracket of the piano body, it bears the tension of the strings and the weight of the piano body, and also plays a role in stabilizing and balancing the piano body. If the piano is not equipped with a mechanism to evenly distribute the force on the back frame, the following problems will occur:

[0003] Sound distortion: The resonance box of the piano is a key sound-producing part, which is located behind the piano body. If there is no back frame with a uniform force mechanism to support and fix the resonance box, the resonance box may be affected by uneven forces, causing the resonance box to deform or move relative to the piano body. This will cause distortion and instability of the tone, affecting the expressiveness of the music and the purity of the sound quality.

[0004] Structural deformation: The piano needs to withstand the tension of the strings, and at the same time, a certain amount of counterforce needs to be applied to the piano body to balance it. If there is no mechanism to evenly distribute the force on the back frame, the piano body may deform unevenly after being subjected to the tension of the strings. This may lead to poor contact between the strings and the piano body, affecting the stability of the pitch, and also posing a potential threat to the structural stability of the piano.

[0005] In summary, if the piano does not have a mechanism for evenly applying force to the back frame, it will cause problems such as sound distortion and structural deformation. Therefore, it is hoped to develop a piano with evenly applied force to the back frame to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a piano with a back frame that is evenly stressed.

[0007] The utility model is realized by the following technical scheme: a piano with a back frame that is evenly stressed, comprising: a piano body, a backboard 1, a backboard 2 and a backboard 3, a group of backboard 1 is arranged above the front of the piano body, a group of backboard 3 is arranged below the backboard 1, and a group of backboard 2 is arranged below the backboard 3;

[0008] A group of insert blocks 1 are respectively arranged on the left and right sides of the lower part of the back panel 1, a group of insert blocks 2 are respectively arranged on the left and right sides of the top of the back panel 3, the left and right sides of the top of the back panel 3 are both recessed downward to form two groups of slots 1, and the left and right sides of the bottom of the back panel 3 are both recessed upward to form two groups of slots 2;

[0009] A group of sound amplification holes 1 are respectively opened on the left and right sides of the upper front of the back panel 1, a group of sound amplification holes 2 are respectively opened on the left and right sides of the lower front of the back panel 2, and a group of stabilization holes are opened in the center of the front of the back panel 3.

[0010] As a preferred embodiment, backboard one, backboard two and backboard three together form a back frame. Backboard one and backboard three have the same specifications and are arranged in a mirror-symmetrical manner. Backboard one, backboard two and backboard three are all made of wood.

[0011] As a preferred embodiment, each group of insert blocks 1 is provided with a group of slide bars 1 on both sides, and each group of insert blocks 2 is provided with a group of slide bars 2 on both sides. The specifications of the slide bars 1 and 2 are the same.

[0012] As a preferred embodiment, a group of slide grooves 1 are respectively opened on the left and right sides of slot 1, and a group of slide grooves 2 are respectively opened on the left and right sides of slot 2, and the specifications of slide grooves 1 and 2 are the same.

[0013] As a preferred embodiment, the length and width of the first slide bar are smaller than the length and width of the first slide groove, and the length and width of the second slide bar are smaller than the length and width of the second slide groove.

[0014] As a preferred embodiment, a group of shock absorbers 1 is provided at the bottom of each group of chute 1, and a group of shock absorbers 2 is provided at the bottom of each group of chute 2. The specifications of shock absorbers 1 and 2 are the same and they are arranged in a mirror-symmetrical manner. The models of shock absorbers 1 and 2 are both ME damping spring shock absorbers.

[0015] In actual use, back panel one transfers pressure downward to two groups of shock absorber one through two groups of plug blocks one, which reduces the rigid contact between back panel one and back panel three, and attenuates the vibration generated when the piano is played. Similarly, back panel two transfers pressure upward to two groups of shock absorber two through two groups of plug blocks two, which reduces the rigid contact between back panel two and back panel three, and attenuates the vibration generated when the piano is played, thereby reducing the pressure and vibration force on back panel one and back panel two.

[0016] As a preferred embodiment, the specifications of the first and second sound expansion holes are the same, and both of the first and second sound expansion holes are a trumpet-shaped structure with a diameter gradually increasing from the back to the front, and the diameters of the front and back of the stabilizing hole are the same and are an equilateral triangle structure;

[0017] In actual use, the pressure is gathered inside the back panel three. Since the stabilizing hole is a regular triangle structure with stability, the stability of the back panel three structure is ensured, and then the overall force of the back frame is evenly distributed, preventing the back frame from deforming and affecting the piano sound quality distortion. When the piano is played, the sound amplification holes one and two can amplify and transmit the sound of the piano, thereby enhancing the expressiveness of the piano sound.

[0018] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: by arranging the plug block 1, the plug block 2, the slot 1, the slot 2, the shock absorber 1 and the shock absorber 2, the rigid connection between the back plate 1, the back plate 2 and the back plate 3 can be reduced, and at the same time, the vibration of the piano when playing is weakened, the pressure on the back frame is reduced, and the deformation of the main structure of the piano to cause sound distortion is prevented; by arranging the slide bar 1, the slide bar 2, the slide groove 1 and the slide groove 2, the back plate 1 and the back plate 3 can be connected, and the back plate 2 and the back plate 3 can be connected, so that the disassembly is convenient and the use is flexible; by arranging the sound amplification hole 1 and the sound amplification hole 2, the sound of the piano when playing can be amplified, and the expression of the piano sound can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 The utility model is a schematic diagram of a piano with a back frame that is evenly stressed.

[0021] Figure 2 The utility model is a structural schematic diagram of a piano middle back frame with uniform back frame force.

[0022] Figure 3 The utility model is a schematic structural diagram of a back board 1 and a back board 2 of a piano with uniform back frame force.

[0023] Figure 4 The utility model is a schematic structural diagram of the three top and bottom parts of a piano backboard with uniform back frame force.

[0024] Figure 5 The utility model is a schematic structural diagram of a first sound amplification hole and a second sound amplification hole in a piano with a back frame subjected to uniform force.

[0025] In the figure, 100 - piano body, 110 - back panel one, 120 - back panel two, 130 - back panel three, 140 - sound amplification hole one, 150 - sound amplification hole two, 160 - insert block one, 170 - slot one, 180 - shock absorber one, 190 - insert block two, 200 - slot two, 210 - shock absorber two, 220 - stabilizing hole, 230 - slide bar one, 240 - slide bar two, 250 - slide groove one, 260 - slide groove two. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only one end of the utility model, not the whole end. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 5 A piano with a uniform back frame force, comprising: a piano body 100, a backboard 1 110, a backboard 2 120 and a backboard 3 130, wherein a group of backboard 1 110 is arranged above the front of the piano body 100, a group of backboard 3 130 is arranged below the backboard 1 110, and a group of backboard 2 120 is arranged below the backboard 3 130;

[0028] A group of insert blocks 160 are respectively arranged on the left and right sides below the back plate 110, a group of insert blocks 2 190 are respectively arranged on the left and right sides of the top of the back plate 3 130, the left and right sides of the top of the back plate 3 130 are both concave downwards to form two groups of slots 1 170, and the left and right sides of the bottom of the back plate 3 130 are both concave upwards to form two groups of slots 2 200;

[0029] A group of sound amplification holes 140 are respectively opened on the left and right sides of the upper front of the back panel 110, a group of sound amplification holes 150 are respectively opened on the left and right sides of the lower front of the back panel 2 120, and a group of stabilization holes 220 are opened in the center of the front of the back panel 3 130.

[0030] See also Figure 1 and Figure 2 The backboard 1 110 , the backboard 2 120 , and the backboard 3 130 together form a back frame. The backboard 1 110 and the backboard 3 130 have the same specifications and are arranged in a mirror-symmetrical manner. The backboard 1 110 , the backboard 2 120 , and the backboard 3 130 are all made of wood.

[0031] See also Figure 3 Each group of insert blocks 160 is provided with a group of slide bars 1 230 on both sides, and each group of insert blocks 2 190 is provided with a group of slide bars 240 on both sides. The slide bars 1 230 and the slide bars 2 240 have the same specifications.

[0032] See also Figure 4 A set of slide grooves 250 are respectively opened on the left and right sides of the slot 1 170, and a set of slide grooves 260 are respectively opened on the left and right sides of the slot 2 200. The specifications of the slide grooves 250 and 260 are the same.

[0033] See also Figure 3 and Figure 4 The length and width of the slide bar 1 230 are both smaller than the length and width of the slide groove 1 250 , and the length and width of the slide bar 240 are both smaller than the length and width of the slide groove 260 .

[0034] See also Figures 1 to 4 Each set of chute 1 250 is provided with a set of shock absorber 180 at the bottom, and each set of chute 2 260 is provided with a set of shock absorber 210 at the bottom. The specifications of shock absorber 180 and shock absorber 210 are the same and are arranged in mirror symmetry. The models of shock absorber 180 and shock absorber 210 are both ME damping spring shock absorbers.

[0035] In actual use, the back panel 110 transfers the pressure downward to the two groups of shock absorbers 180 through the two groups of plug blocks 160, which reduces the rigid contact between the back panel 110 and the back panel 3 130, and at the same time reduces the vibration generated when the piano is played. Similarly, the back panel 2 120 transfers the pressure upward to the two groups of shock absorbers 2 210 through the two groups of plug blocks 2 190, which reduces the rigid contact between the back panel 2 120 and the back panel 3 130, and at the same time reduces the vibration generated when the piano is played, thereby reducing the pressure and vibration force on the back panel 110 and the back panel 2 120.

[0036] See also Figure 4 and Figure 5 The specifications of the first sound expansion hole 140 and the second sound expansion hole 150 are the same. The first sound expansion hole 140 and the second sound expansion hole 150 are both a trumpet-shaped structure with a diameter gradually increasing from the back to the front. The front and back diameters of the stabilizing hole 220 are the same and are an equilateral triangle structure.

[0037] During actual use, the pressure is gathered inside the back panel three 130. Since the stabilizing hole 220 is a regular triangle structure with stability, the stability of the back panel three 130 structure is ensured, and then the overall force of the back frame is evenly applied, preventing the back frame from deforming and affecting the piano sound quality distortion. When the piano is played, the sound amplification hole 140 and the sound amplification hole 2 150 can amplify and transmit the sound of the piano, thereby enhancing the expressiveness of the piano sound.

[0038] See also Figures 1 to 4 As a set of embodiments of the utility model: in actual use, first align the two groups of slots 200 at the bottom of the back plate 3 130 with the tops of the two groups of plug blocks 2 190, insert the four groups of slide bars 240 downward along the four groups of slide grooves 260, and insert the two groups of plug blocks 2 190 upward into the two groups of slots 200, so that the tops of the two groups of plug blocks 2 190 are respectively in contact with the bottoms of the two groups of shock absorbers 2 210, thereby installing the back plate 3 130 on the top of the back plate 2 120;

[0039] Pick up the back panel 110, align the two groups of plug blocks 160 at the bottom of the back panel 110 with the tops of the two groups of slots 170, insert the four groups of slide bars 230 downward along the four groups of slide grooves 250, and insert the two groups of plug blocks 160 downward into the two groups of slots 170, so that the bottoms of the two groups of plug blocks 160 are respectively in contact with the tops of the two groups of shock absorbers 180, thereby installing the back panel 110 on the top of the back panel three 130, and then completing the installation of the entire back frame, which is easy to install and convenient to maintain.

[0040] See also Figures 1 to 5 As another embodiment of the present invention: Based on the further elaboration of the above embodiment, when the back frame bears the overall pressure of the piano body 100, the back plate 1 10 transmits the pressure downward to the two groups of shock absorbers 1 180 through the two groups of plug blocks 1 160, which reduces the rigid contact between the back plate 1 10 and the back plate 3 130 and reduces the vibration generated when the piano is played. Similarly, the back plate 2 120 transmits the pressure upward to the two groups of shock absorbers 2 210 through the two groups of plug blocks 2 190, which reduces the rigid contact between the back plate 2 120 and the back plate 3 130 and reduces the vibration generated when the piano is played, thereby reducing the pressure and vibration force on the back plate 1 10 and the back plate 2 120;

[0041] At the same time, when the pressure gathers inside the back panel three 130, the stabilizing hole 220 is a regular triangle structure with stability, thereby ensuring the stability of the back panel three 130, and then making the overall force on the back frame uniform, preventing the back frame from deforming and affecting the piano sound quality distortion. When the piano is played, the sound amplification hole 140 and the sound amplification hole 2 150 can amplify and transmit the sound of the piano, thereby enhancing the expressiveness of the piano sound.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A piano with a back frame that is evenly stressed, comprising: A piano body (100), a backboard 1 (110), a backboard 2 (120) and a backboard 3 (130), characterized in that: a group of backboard 1 (110) is provided above the front of the piano body (100), a group of backboard 3 (130) is provided below the backboard 1 (110), and a group of backboard 2 (120) is provided below the backboard 3 (130); A group of insert blocks (160) are respectively arranged on the left and right sides of the bottom of the back plate (110), a group of insert blocks (190) are respectively arranged on the left and right sides of the top of the back plate (130), the left and right sides of the top of the back plate (130) are both concave downwards to form two groups of slots (170), and the left and right sides of the bottom of the back plate (130) are both concave upwards to form two groups of slots (200); A group of sound amplification holes (140) are respectively opened through the left and right sides of the upper front of the back panel one (110), a group of sound amplification holes (150) are respectively opened through the left and right sides of the lower front of the back panel two (120), and a group of stabilization holes (220) are opened through the center of the front of the back panel three (130).

2. A piano with uniform back frame force as claimed in claim 1, characterized in that: The backboard one (110), the backboard two (120) and the backboard three (130) together form a back frame. The backboard one (110) and the backboard three (130) have the same specifications and are arranged in a mirror-symmetrical manner. The backboard one (110), the backboard two (120) and the backboard three (130) are all made of wood.

3. A piano with uniform back frame force as claimed in claim 1, characterized in that: Each group of the first plug block (160) is provided with a group of first slide bars (230) on both sides, and each group of the second plug block (190) is provided with a group of second slide bars (240) on both sides. The first slide bars (230) and the second slide bars (240) have the same specifications.

4. A piano with uniform back frame force as claimed in claim 1, characterized in that: A set of slide grooves 1 (250) are respectively opened on the left and right sides of the slot 1 (170), and a set of slide grooves 2 (260) are respectively opened on the left and right sides of the slot 2 (200), and the specifications of the slide grooves 1 (250) and the slide grooves 2 (260) are the same.

5. A piano with uniform back frame force as claimed in claim 3, characterized in that: The length and width of the slide bar 1 (230) are both smaller than the length and width of the slide groove 1 (250), and the length and width of the slide bar 2 (240) are both smaller than the length and width of the slide groove 2 (260).

6. A piano with uniform back frame force as claimed in claim 4, characterized in that: A group of shock absorbers 1 (180) is provided at the bottom of each group of slots 1 (170), and a group of shock absorbers 2 (210) is provided at the bottom of each group of slots 2 (200). The specifications of the shock absorbers 1 (180) and 2 (210) are the same and they are arranged in a mirror-symmetrical manner. The models of the shock absorbers 1 (180) and 2 (210) are both ME damping spring shock absorbers.

7. A piano with uniform back frame force as claimed in claim 1, characterized in that: The specifications of the sound expansion hole 1 (140) and the sound expansion hole 2 (150) are the same. The sound expansion hole 1 (140) and the sound expansion hole 2 (150) are both a trumpet-shaped structure with a diameter gradually increasing from the back to the front. The stabilizing hole (220) has the same diameter on the front and back sides and is an equilateral triangle structure.

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