CN210719399U

CN210719399U - Sound level meter for occupational health noise detection

Info

Publication number: CN210719399U
Application number: CN201921375309.3U
Authority: CN
Inventors: 夏怀翔; 赵华芝; 严章飞; 孔玉萍; 张强; 方栋; 段志祥
Original assignee: Anhui Hongyuan Occupational Health Technology Service Co ltd
Current assignee: Anhui Hongyuan Occupational Health Technology Service Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-06-09
Anticipated expiration: 2029-08-23

Abstract

The utility model relates to an occupational health detecting instrument technical field, concretely relates to sound level meter for occupational health noise detection, including sound level meter casing and visor, the front of sound level meter casing is provided with overload indicator, LED liquid crystal display and operation area, the back of sound level meter casing is inlayed with sheetmetal and battery case, the sheetmetal contacts with the iron core installed inside the sound level meter casing, the outer wall of iron core is around-jointed with the conductive coil, the inside of battery case is installed with the dry battery; a condenser microphone is arranged in the middle of the top end of the sound level meter shell, and a windproof sponge fan cover is sleeved at the top end of the condenser microphone; the top and the bottom of the sound level meter shell are both provided with connecting parts, and the connecting parts are both provided with clamping grooves; the utility model solves the problems that the condenser microphone is easy to be broken and the surface of the windproof sponge fan cover is easy to be stained with dust, which is easy to cause the reduction of the measurement precision; the sound level meter can not be adsorbed on the iron stand for use, and the application range is small.

Description

Sound level meter for occupational health noise detection

Technical Field

The utility model relates to an occupational health detecting instrument technical field, concretely relates to sound level meter is used in occupational health noise detection.

Background

Occupational health research is directed to the health problems of humans during various occupational activities, with the goal of protecting the health of workers from harmful elements during the occupational activities, including the impact of the work environment on worker health and countermeasures to prevent occupational hazards. Only by creating reasonable working conditions, all the personnel engaged in the labor can keep healthy in the aspects of physique, spirit, social adaptation and the like. In the detection of occupational environmental noise, sound level meters are often used.

A sound level meter is the most basic instrument in noise measurement. The sound level meter is generally composed of a capacitor microphone, a preamplifier, an attenuator, an amplifier, a frequency weighting network, a valid value indicating gauge head and the like. The working principle of the sound level meter is as follows: the sound is converted into an electric signal by a microphone, and impedance is converted by a preamplifier to match the microphone with an attenuator. The amplifier adds the output signal to weighting network, carries on frequency weighting (or external filter) to the signal, then amplifies the signal to certain amplitude through attenuator and amplifier, sends to effective value detector (or external recording level meter), gives the value of noise level on the indicating gauge head.

For example, the patent with publication number CN201820506146.7 discloses a multifunctional precision sound level meter, which comprises a sound level meter housing and a charging interface, wherein a condenser microphone is installed on the top of the sound level meter housing, an LED liquid crystal display screen is installed on the front surface wall of the sound level meter housing, a power switch key is installed below the LED liquid crystal display screen, a range selection key is installed on the right side of a pause key, a storage battery is installed on the inner bottom of the sound level meter housing, the output end of the condenser microphone is electrically connected with the input end of a preamplifier, the output end of the preamplifier is electrically connected with the input end of an attenuator, the output end of a digital-to-analog converter is electrically connected with the input end of the LED liquid crystal display screen, noise and high-decibel sound can be recorded by the condenser microphone, and the detected sound is displayed on the LED liquid crystal display screen, which, the practicality of accurate sound level meter has been improved. However, the utility model still has many disadvantages, such as: the condenser microphone is easy to break and the surface of the windproof sponge wind cover is easy to be stained with dust, thus easily reducing the measurement precision; the sound level meter cannot be adsorbed on an iron frame for use, and the application range is small; it is inconvenient to detect at different heights and narrow positions.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a sound level meter for occupational health noise detection has been designed to the problem that the background art provided.

The utility model discloses a realize through following technical scheme:

a sound level meter for occupational health noise detection comprises a sound level meter shell and a protective cover, wherein an overload indicator lamp, an LED liquid crystal display screen and an operation area are arranged on the front face of the sound level meter shell, a metal sheet and a battery box are embedded in the back face of the sound level meter shell, the metal sheet is in contact with an iron core arranged inside the sound level meter shell, a conductive coil is wound on the outer wall of the iron core, and a dry battery is arranged inside the battery box; a condenser microphone is mounted in the middle of the top end of the sound level meter shell, and a windproof sponge fan cover is sleeved at the top end of the condenser microphone; the top and the bottom of the sound level meter shell are both provided with connecting parts, and the connecting parts are both provided with clamping grooves; the lower port inner wall of the protective cover is fixed with a clamping block matched with the clamping groove, the upper end face of the protective cover is provided with a rectangular groove, the front side edge and the rear side edge of the rectangular groove are respectively provided with a first stop hinge, and the outer wall of the first stop hinge is fixed with a support plate.

Further, the operation area comprises a power key, a range selection key, a pause key, an adsorption key and an SD card slot.

Furthermore, one end of the conductive coil is electrically connected with the anode of the dry battery through a lead, and the other end of the conductive coil is sequentially connected with the switch for controlling the adsorption key and the cathode of the dry battery through leads.

Furthermore, the left side wall and the right side wall of the sound level meter shell are both fixed with anti-skidding protrusions.

Furthermore, the number of the metal sheets is one or more, and the metal sheets are made of soft iron or silicon steel materials with fast demagnetization.

Furthermore, the back of the sound level meter shell is further provided with a containing groove, a second random stop hinge is arranged inside the containing groove, a connecting sleeve is fixed on the outer wall of the second random stop hinge, and an internal thread is formed in the inner wall of the connecting sleeve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, when the sound level meter is not used, the protective cover can be clamped at the top of the sound level meter shell, on one hand, the condenser microphone can be protected from being broken, on the other hand, the dust-proof function can be achieved, the external dust can be prevented from being infected on the surface of the windproof sponge wind cover, and the reduction of the detection accuracy of the sound intensity can be prevented; when detecting, also can launch 180 with the backup pad that the visor top surface stopped hinged joint through first wantonly to make backup pad and visor top surface keep the level, again with the reverse joint of visor in the bottom of sound level meter casing, thereby can place the sound level meter and detect on the horizontal stand, need not handheld measuring, convenient and practical also conveniently records the data after detecting simultaneously.

2. The utility model discloses in, whether the control switch of absorption key opens or the disconnection has directly decided the conductive coil circular telegram, after the conductive coil switch on, enables the iron core and is magnetized by the magnetic field of conductive coil, and the iron core contacts with the sheetmetal again, and then enables the sheetmetal and have magnetism to examine time measuring when examining special occupational environment noise, also can inhale the sound level meter magnetism on equipment iron stand.

3. The utility model discloses in, the groove has still been seted up at the back of sound level meter casing and has been accomodate, the internally mounted who accomodates the groove has the second to stop the hinge wantonly, the second stops the hinge outer wall wantonly and is fixed with the adapter sleeve, the inner wall of adapter sleeve is seted up there is the internal thread, can be earlier with the adapter sleeve reversal play, borrow the bracing piece that the top was equipped with the external screw thread again and install with the adapter sleeve mutually, can not only satisfy the measurement requirement to not co-altitude, can also make the sound level meter can extend the place that the staff arm can.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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

FIG. 2 is a schematic structural view of the sound level meter in FIG. 1 with the protective cover mounted on the bottom of the housing;

FIG. 3 is a schematic view of the back side of the present invention with the protective cover removed;

fig. 4 is a schematic perspective view of the protective cover of the present invention;

fig. 5 is a schematic structural view of the support plate of the protective cover of the present invention after being unfolded;

fig. 6 is a schematic structural view of a back portion of a metal sheet.

The sound level meter comprises a 1-sound level meter shell, a 2-protective cover, a 3-overload indicator lamp, a 4-LED liquid crystal display screen, a 5-metal sheet, a 6-battery box, a 7-iron core, an 8-conductive coil, a 9-dry battery, a 10-condenser microphone, a 11-windproof sponge fan cover, a 12-connecting part, a 13-clamping groove, a 14-rectangular groove, a 15-first arbitrary stop hinge, a 16-supporting plate, a 17-power key, an 18-range selection key, a 19-pause key, a 20-adsorption key, a 21-SD card clamping groove, a 22-anti-skid protrusion, a 23-accommodating groove, a 24-second arbitrary stop hinge and a 25-connecting sleeve.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 6, a sound level meter for detecting occupational health noise includes a sound level meter casing 1 and a protective cover 2, and is characterized in that: the front side of the sound level meter shell 1 is provided with an overload indicator lamp 3, an LED liquid crystal display screen 4 and an operation area, the back side of the sound level meter shell 1 is embedded with a metal sheet 5 and a battery box 6, the metal sheet 5 is in contact with an iron core 7 arranged inside the sound level meter shell 1, the outer wall of the iron core 7 is wound with a conductive coil 8, and a dry battery 9 is arranged inside the battery box 6; a condenser microphone 10 is arranged in the middle of the top end of the sound level meter shell 1, and a windproof sponge wind cover 11 is sleeved at the top end of the condenser microphone 10; the top and the bottom of the sound level meter shell 1 are both provided with connecting parts 12, and the connecting parts 12 are both provided with clamping grooves 13; the inner wall of the lower port of the protective cover 2 is fixed with a clamping block matched with the clamping groove 13, the upper end face of the protective cover 2 is provided with a rectangular groove 14, the front side edge and the rear side edge of the rectangular groove 14 are respectively provided with a first stop hinge 15, and the outer wall of the first stop hinge 15 is fixed with a support plate 16.

As a further modification of the above scheme, the operation area includes a power key 17, a span selection key 18, a pause key 19, an adsorption key 20, and an SD card slot 21.

As a further improvement of the above solution, the sound level meter housing 1 has anti-slip protrusions 22 fixed to both left and right side walls, so that when the sound level meter is held by hand and used, the friction force between the sound level meter and the hand can be increased, and the anti-slip effect is achieved.

The utility model discloses a first concrete implementation is used: before detection, the supporting plate 16 connected with the top surface of the protective cover 2 through the first optional stop hinge 15 can be unfolded by 180 degrees, the supporting plate 16 and the top surface of the protective cover 2 are kept horizontal, and the protective cover 2 is clamped at the bottom of the sound level meter shell 1 in reverse, so that the sound level meter can be placed on a horizontal table for detection, the measurement is not required to be carried out by hands, convenience and practicability are realized, and meanwhile, the detected data can be conveniently recorded; during detection, an operation area arranged on the front face of the sound level meter shell 1 can be controlled, the operation area comprises a power key 17, a range selection key 18, a pause key 19, an adsorption key 20 and an SD card slot 21, and as the working principle and the internal circuit connection structure of the sound level meter are the prior art, the measured result can be displayed on the LED liquid crystal display screen 4; use the sound level timing, can be with the 2 joint of visor at the top of sound level meter casing 1, on the one hand can protect condenser microphone 10 not broken, and on the other hand can also play dustproof effect, can prevent that external dust from being infected with on the surface of windproof sponge fan housing 11 to prevent to cause the reduction of sound intensity detection accuracy.

The utility model discloses a second concrete implementation is used: the groove 23 has still been seted up to the back of sound level meter casing 1, the internally mounted who accomodates groove 23 has the second to stop hinge 24 wantonly, the second stops hinge 24 outer wall wantonly and is fixed with adapter sleeve 25, the internal thread has been seted up to the inner wall of adapter sleeve 25, can turn the adapter sleeve 25 out with the reversal earlier, borrow the bracing piece that the top was equipped with the external screw thread again and install with adapter sleeve 25 mutually, can not only satisfy the measurement requirement to not co-altitude, can also make the sound level meter can extend to the place that the staff arm can't reach simultaneously.

The utility model discloses a third concrete implementation is used: one end of the electric coil 8 is electrically connected with the positive pole of the dry battery 9 through a lead, and the other end of the electric coil 8 is sequentially connected with the switch for controlling the adsorption key 20 and the negative pole of the dry battery 9 through leads, so that the adsorption key 20 controls whether the electric coil 8 is electrified or not, when the electric coil 8 is powered on, the iron core 7 can be magnetized by the magnetic field of the electric coil 8, the iron core 7 is contacted with the metal sheet 5, and the metal sheet 5 can further have magnetism, so that when the noise detection is carried out on a special occupational environment, the sound level meter can be magnetically attracted on an equipment iron frame; wherein, the quantity of sheetmetal 5 is 1 or 2, and sheetmetal 5 is made by the soft iron or silicon steel material that the demagnetization is very fast, and sheetmetal 5 has magnetism when the electro-magnet circular telegram like this, and the back magnetic disappears along with it of cutting off the power supply.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A sound level meter for occupational health noise detection, includes sound level meter casing (1) and visor (2), its characterized in that: the front side of the sound level meter shell (1) is provided with an overload indicator lamp (3), an LED liquid crystal display screen (4) and an operation area, the back side of the sound level meter shell (1) is inlaid with a metal sheet (5) and a battery box (6), the metal sheet (5) is in contact with an iron core (7) installed inside the sound level meter shell (1), the outer wall of the iron core (7) is wound with a conductive coil (8), and a dry battery (9) is installed inside the battery box (6); the middle of the top end of the sound level meter shell (1) is provided with a condenser microphone (10), and the top end of the condenser microphone (10) is sleeved with a windproof sponge fan cover (11); the top and the bottom of the sound level meter shell (1) are both provided with connecting parts (12), and the connecting parts (12) are both provided with clamping grooves (13); the utility model discloses a hinge of stopping wantonly, including visor (2), draw-in groove (13) matched with fixture block, rectangular channel (14) have been seted up to the up end of visor (2), hinge (15) are stopped wantonly to the preceding, back side of rectangular channel (14) all install, the outer wall that first stop hinge (15) wantonly all is fixed with backup pad (16).

2. The sound level meter for occupational health noise detection according to claim 1, wherein: the operation area comprises a power key (17), a range selection key (18), a pause key (19), an adsorption key (20) and an SD card slot (21).

3. The sound level meter for occupational health noise detection according to claim 2, wherein: one end of the conductive coil (8) is electrically connected with the positive electrode of the dry battery (9) through a lead, and the other end of the conductive coil (8) is sequentially connected with a switch for controlling the adsorption key (20) and the negative electrode of the dry battery (9) through leads.

4. The sound level meter for occupational health noise detection according to claim 1, wherein: and anti-skid protrusions (22) are fixed on the left side wall and the right side wall of the sound level meter shell (1).

5. The sound level meter for occupational health noise detection according to claim 1, wherein: the number of the metal sheets (5) is 1 or 2, and the metal sheets (5) are made of soft iron or silicon steel materials which can be demagnetized quickly.

6. The sound level meter for occupational health noise detection according to claim 1, wherein: the back of sound level meter casing (1) has still been seted up and has been accomodate groove (23), the internally mounted of accomodating groove (23) has the second to stop hinge (24) wantonly, the second stops hinge (24) outer wall wantonly and is fixed with adapter sleeve (25), the inner wall of adapter sleeve (25) is seted up there is the internal thread.