CN215573345U

CN215573345U - Sound level calibrator that precision is high

Info

Publication number: CN215573345U
Application number: CN202121513815.1U
Authority: CN
Inventors: 李静珍
Original assignee: Jinan Jinhang Environmental Protection Testing Technology Co ltd
Current assignee: Jinan Jinhang Environmental Protection Testing Technology Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-01-18
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a sound level calibrator with high precision, which comprises a calibrator body, a microphone, a first fixing bolt, a first telescopic outer rod, a second telescopic outer rod and a second fixing bolt, a microphone is arranged on the outer end face of one side of the calibrator body, a sealing cover is hinged on the outer end face of one side of the microphone, a handle is fixed on the outer end face of one side of the sealing cover, a display screen is embedded and fixed on the front surface of the calibrator body, a first key is installed on one side of the display screen on the front surface of the calibrator body, and the front surface of the calibrator body is provided with a second key above the first key, the first telescopic outer rod is fixed on the upper surface of the microphone, and the front surface threaded connection of first flexible outer pole has first fixing bolt, the lower surface at the microphone is fixed to the flexible outer pole of second, and the front surface threaded connection of the flexible outer pole of second has second fixing bolt. The diameter of the microphone can be changed, so that the microphone is convenient to match with a reference cavity.

Description

Sound level calibrator that precision is high

Technical Field

The utility model relates to the technical field of sound level calibrators, in particular to a sound level calibrator with high precision.

Background

A sound level calibrator is a device that, when coupled to a microphone of a given model and configuration (e.g., with or without a protective grill cover), produces one or more known sound pressure levels at one or more given frequencies. The sound level calibrator generates a sound pressure level that is related to environmental conditions such as air pressure, air, temperature, and relative humidity.

The sound level calibrator at present is to plug the microphone into the reference cavity for calibration, the reference cavity diameters of different sound level meters are also different, and the mismatch of the sizes of the microphone and the reference cavity may cause poor calibration effect, which affects the use of the sound level meter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sound level calibrator with high precision, which has the advantages of changeable microphone diameter and convenient matching with a reference cavity, and solves the problems that the sound level calibrator at present is used for calibrating by plugging a microphone into the reference cavity, the reference cavity diameters of different sound level meters are different, the mismatch of the microphone and the reference cavity size can cause poor calibration effect, and the use of the sound level meter is influenced.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a sound level calibrator that precision is high, includes calibrator body, microphone, first fixing bolt, the flexible outer pole of first flexible outer pole, second and second fixing bolt, the microphone is installed to the outer terminal surface in one side of calibrator body, and the front surface embedding of calibrator body is fixed with the display screen, the upper surface at the microphone is fixed to the first flexible outer pole, and the front surface threaded connection of the first flexible outer pole has first fixing bolt, the lower surface at the microphone is fixed to the flexible outer pole of second, and the front surface threaded connection of the flexible outer pole of second has second fixing bolt.

Preferably, a first key is installed on one side, located on the display screen, of the front surface of the calibrator body, and a second key is installed on the upper portion, located on the first key, of the front surface of the calibrator body.

Preferably, a first telescopic inner rod is movably inserted into the upper surface of the first telescopic outer rod, and a first fixing plate is welded on the upper surface of the first telescopic inner rod.

Preferably, the outer end face of one side of the microphone is connected with a sealing cover in a hinge mode, and a handle is fixed to the outer end face of one side of the sealing cover.

Preferably, a second telescopic inner rod is movably inserted into the lower surface of the second telescopic outer rod, and a second fixing plate is welded on the lower surface of the second telescopic inner rod.

Compared with the prior art, the utility model has the following beneficial effects:

1. the first telescopic outer rod, the first telescopic inner rod, the first fixing plate and the first fixing bolt are arranged, so that the effect of conveniently changing the diameter of the microphone is achieved, the first fixing bolt is loosened, the first telescopic inner rod is stretched to a proper position according to the diameter of the inner wall of the register cavity, the first fixing bolt is screwed, the microphone is inserted into the register cavity through the first fixing plate, and the diameter of the microphone is conveniently changed to be matched with the diameter of the register cavity.

2. The second telescopic outer rod, the second telescopic inner rod, the second fixing plate and the second fixing bolt are arranged, so that the effect of conveniently changing the diameter of the microphone is achieved, the second fixing bolt is loosened, the second telescopic inner rod is stretched to a proper position according to the diameter of the inner wall of the register cavity, the second fixing bolt is screwed, the microphone is inserted into the register cavity through the second fixing plate, and the diameter of the microphone is conveniently changed to be matched with the diameter of the register cavity.

3. The microphone is used by holding the handle with hands, the handle drives the handle to rotate, the sealing cover is driven to rotate by the handle, the sealing cover is opened, and the microphone can be used.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic front view of the first and second fixing plates after moving;

FIG. 3 is a front view of the sealing cover of the present invention shown in an open configuration;

fig. 4 is a front sectional structural view of the present invention.

In the figure: 1. a display screen; 2. a calibrator body; 3. a first key; 4. a second key; 5. a microphone; 6. a first fixing bolt; 7. a first telescoping outer pole; 8. a first telescopic inner rod; 9. a first fixing plate; 10. a sealing cover; 11. a handle; 12. a second fixing plate; 13. a second telescopic inner rod; 14. a second telescoping outer pole; 15. and a second fixing bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, an embodiment of the present invention includes: a sound level calibrator with high precision comprises a calibrator body 2, a microphone 5, a first fixing bolt 6, a first telescopic outer rod 7, a second telescopic outer rod 14 and a second fixing bolt 15, wherein the outer end face of one side of the calibrator body 2 is provided with the microphone 5, the outer end face of one side of the microphone 5 is hinged with a sealing cover 10, the outer end face of one side of the sealing cover 10 is fixed with a handle 11, the front surface of the calibrator body 2 is embedded and fixed with a display screen 1, the front surface of the calibrator body 2 is positioned at one side of the display screen 1 and provided with a first key 3, the front surface of the calibrator body 2 is positioned above the first key 3 and provided with a second key 4, when the microphone 5 is required to be used, the handle 11 is held by hand, the handle 11 drives the handle 11 to rotate, the sealing cover 10 is driven by the handle 11 to rotate, the sealing cover 10 is opened, the microphone 5 can be used and is not required to be used, the handle 11 is held by hand, the handle 11 is driven by hand to rotate, the sealing cover 10 is driven by the handle 11 to rotate, the sealing cover 10 is closed, and dust can be prevented from entering the microphone 5.

First flexible outer pole 7 is fixed at the upper surface of microphone 5, and the front surface threaded connection of first flexible outer pole 7 has first fixing bolt 6, the upper surface activity of first flexible outer pole 7 is pegged graft and is had first flexible interior pole 8, and the upper surface welding of first flexible interior pole 8 has first fixed plate 9, loosen first fixing bolt 6 soon, according to the tensile first flexible interior pole 8 of inner wall diameter that closes the chamber, it is tensile to suitable position, first fixing bolt 6 screws, peg graft microphone 5 at the interior portion that closes the chamber through first fixed plate 9, be convenient for change the diameter of microphone 5 with the diameter that matches the book chamber.

The flexible outer pole 14 of second is fixed at the lower surface of microphone 5, and the front surface threaded connection of the flexible outer pole 14 of second has second fixing bolt 15, the flexible interior pole 13 of second is pegged graft in the lower surface activity of the flexible outer pole 14 of second, and the lower surface welding of the flexible interior pole 13 of second has second fixed plate 12, loosen second fixing bolt 15, according to the flexible interior pole 13 of the inner wall diameter that closes the chamber of second, it is tensile to suitable position, screw second fixing bolt 15, peg graft microphone 5 in the book closes intracavity portion through second fixed plate 12, be convenient for change the diameter of microphone 5 with the diameter that matches the book and close the chamber.

Of course, as is well known to those skilled in the art, the calibrator body 2 of the present invention also needs to provide a power device to enable its normal operation, and as is well known to those skilled in the art, the provision of the power is common and is common to conventional means or common general knowledge, and will not be described herein again, and those skilled in the art can make any choice according to their needs or convenience.

The working principle is as follows: loosening the first fixing bolt 6, stretching the first telescopic inner rod 8 to a proper position according to the diameter of the inner wall of the joint cavity, screwing the first fixing bolt 6, and inserting the microphone 5 into the joint cavity through the first fixing plate 9, so that the diameter of the microphone 5 can be changed to match the diameter of the joint cavity; loosening the second fixing bolt 15, stretching the second telescopic inner rod 13 to a proper position according to the diameter of the inner wall of the joint cavity, screwing the second fixing bolt 15, and inserting the microphone 5 into the joint cavity through the second fixing plate 12, so that the diameter of the microphone 5 can be changed to match the diameter of the joint cavity; when the microphone 5 needs to be used, the handle 11 is held by hand, the handle 11 is driven by hand to rotate, the handle 11 drives the sealing cover 10 to rotate, the sealing cover 10 is opened, the microphone 5 can be used, when the microphone is not used, the handle 11 is held by hand, the handle 11 is driven by hand to rotate, the sealing cover 10 is driven by the handle 11 to rotate, the sealing cover 10 is closed, and dust can be prevented from entering the interior of the microphone 5.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a sound level calibrator that precision is high, includes calibrator body (2), microphone (5), first fixing bolt (6), first flexible outer pole (7), the flexible outer pole of second (14) and second fixing bolt (15), its characterized in that: microphone (5) are installed to the outer terminal surface in one side of calibrator body (2), and the front surface embedding of calibrator body (2) is fixed with display screen (1), the upper surface at microphone (5) is fixed in first flexible outer pole (7), and the front surface threaded connection of first flexible outer pole (7) has first fixing bolt (6), the lower surface at microphone (5) is fixed in the flexible outer pole of second (14), and the front surface threaded connection of the flexible outer pole of second (14) has second fixing bolt (15).

2. A high accuracy sound level calibrator according to claim 1, wherein: the front surface of the calibrator body (2) is located on one side of the display screen (1) and is provided with a first key (3), and the front surface of the calibrator body (2) is located above the first key (3) and is provided with a second key (4).

3. A high accuracy sound level calibrator according to claim 1, wherein: the upper surface activity of first flexible outer pole (7) is pegged graft and is had first flexible interior pole (8), and the upper surface welding of first flexible interior pole (8) has first fixed plate (9).

4. A high accuracy sound level calibrator according to claim 1, wherein: the outer end face of one side of the microphone (5) is connected with a sealing cover (10) in a hinge mode, and a handle (11) is fixed to the outer end face of one side of the sealing cover (10).

5. A high accuracy sound level calibrator according to claim 1, wherein: the lower surface of the second telescopic outer rod (14) is movably inserted with a second telescopic inner rod (13), and the lower surface of the second telescopic inner rod (13) is welded with a second fixing plate (12).