JP7397507B2 - Measuring device - Google Patents

Description

The present invention relates to a measuring device, and more particularly to a portable measuring device that has a housing portion in which a battery is housed and is carried by a worker.

Steam traps are known that are used to discharge only condensate (drain) from piping equipment through which steam flows. Many such steam traps are installed in various plants.

In addition, the intensity of vibration and surface temperature of the steam trap and the steam piping at its entrance are measured, and the presence or absence of steam leakage is diagnosed based on the correlation between them. For such diagnosis, a measuring device is used that includes a vibration probe for measuring the intensity of vibration of a steam trap or the like, and a temperature probe for measuring the surface temperature of the steam trap or the like. There are two types of measurement devices: portable types that are carried by workers to measure steam traps and the like in plants, and installation types that have vibration probes and temperature probes fixed to steam traps and the like. Patent Document 1 discloses a portable measuring device.

As shown in FIG. 6A, the measuring device 9 disclosed in Patent Document 1 includes a housing section 90, a probe 91, and a lid 92. The housing portion 90 has a flat and thin rectangular parallelepiped shape. A recess 90b for accommodating batteries 93 and 94 is formed in the back surface 90a of the casing 90. The probe 91 is formed to protrude outward from the end surface of the housing section 90 in the Y direction. At the tip of the probe 91, a vibration probe tip and a temperature probe tip are provided.

The lid 92 is disposed so as to close the opening of the recess 90b in which the batteries 93 and 94 are housed, and is attached to the housing section 90 with screws 95 and 96. The housing portion 90 is formed with screw holes 90c and 90d into which screws 95 and 96 are screwed.

As shown in FIG. 6(b), in the measuring device 9 disclosed in Patent Document 1, the housing portion 90 has locking recesses 90e, 90f in addition to the screw holes 90c, 90d on the outer circumference of the recess 90b. is also formed. Locking pieces (not shown) formed on the lid 92 are fitted into the locking recesses 90e and 90f. Note that, as shown in FIG. 6(b), the screw holes 90c, 90d and the locking recesses 90e, 90f are provided with the recess 90b sandwiched therebetween in the Y direction.

The measuring device 9 disclosed in Patent Document 1 is configured to sequentially or timely transmit measured data to a notebook personal computer (hereinafter referred to as a "notebook PC") carried by a worker. There is.

Japanese Patent Application Publication No. 2018-84419

For example, in a plant such as a petroleum industrial complex, it may not be possible to bring a notebook PC with a built-in Li-ion battery into the plant due to explosion-proof regulations. When performing measurements using a measuring device in such a plant, it is possible to store the measured data in the memory of the measuring device and transfer the data to a personal computer, etc. after the worker leaves the plant. It becomes necessary. For this reason, in measuring devices used in plants such as petroleum industrial complexes, it is necessary to increase the battery capacity in order to store a large amount of data in a memory or the like.

As a specific measure to realize a measuring device having a large battery capacity, a configuration in which two or more batteries are added to the measuring device 9 disclosed in Patent Document 1 can be considered. Here, in the case part 90 shown in FIG. 6(a), it is considered difficult to increase the width in the X direction since the part is held by the operator. Therefore, when trying to increase the number of batteries, by lengthening the housing portion 90 shown in FIG. 6(a) in the Y direction and also lengthening the recess 90b in the Y direction, a plurality of batteries can be installed in the Y direction. It is conceivable to configure them so that they are lined up.

However, with respect to the measuring device 9 disclosed in Patent Document 1, when the housing portion 90 is extended in the Y direction, the lid 92 also needs to be lengthened in the Y direction, which may cause problems with the strength of the lid 92. It will be done. That is, if the number of batteries housed in the housing 90 is increased, the total weight of the batteries will also increase, and the load applied to the lid 92 during transportation will increase. become. If the load applied to the lid 92 increases in this way, it is possible that the lid 92 will bend or come off the housing 90, and the connections between the batteries or between the batteries and the terminals may be This may result in defects.

On the other hand, in order to prevent the lid 92 from bending or coming off the casing 90, the thickness of the lid 92 may be increased or the material of the lid 92 may be made of a high-strength material. However, if such a measure is adopted, there may arise problems such as an increase in the thickness and weight of the measuring device 9 as a whole, and furthermore, an increase in manufacturing cost.

The present invention has been made to solve the above-mentioned problems, and it is possible to secure a large battery capacity while suppressing an increase in size, weight, and manufacturing cost, and to reduce the amount of battery stored in the battery. An object of the present invention is to provide a measuring device that can be held securely within a housing.

A measuring device according to one aspect of the present invention includes a housing and a probe. The housing section has a substantially rectangular parallelepiped shape that is elongated in one direction, and accommodates a plurality of batteries. The probe is a part that protrudes from one end surface in the longitudinal direction of the housing, and measures the state of the measurement target by pressing the tip against the measurement target, and is a rod-shaped or cylindrical part. It has a shape. Each of the plurality of batteries housed in the housing has a long columnar external shape.

In the measuring device according to this aspect, the housing section includes a case and a lid. The case accommodates the plurality of batteries and has an opening recessed in the thickness direction from one main surface, the length in the one direction being longer than the length in the direction perpendicular to the one direction. This is a member provided with a battery storage section having a section. The lid is a member that closes the opening of the case. The battery storage section has an end holding section on the side of the opening that holds both ends of each of the plurality of batteries in the longitudinal direction between the end portions of the battery and the bottom surface of the battery storage section.

In the measuring device according to the above aspect, since the end holding portion is formed in the battery storage portion corresponding to each battery, the plurality of batteries stored in the housing portion can be moved by the operator by transporting the measuring device. Even if a force is applied to the battery, the battery is prevented from detaching from the battery housing or moving within the battery housing. For this reason, in the measuring device according to the above aspect, even if the size of the lid increases due to increasing the number of batteries stored, the thickness of the lid may be increased or the material of the lid may be made of a high-strength material. The battery to be stored can be reliably held in the battery storage part without having to do so.

In the measuring device according to the above aspect, the battery storage portion may have a plurality of recesses in which each of the plurality of batteries is individually accommodated, and the end holding portion is an edge of the recess on an opening side. It may be formed to protrude from the bottom surface along the bottom surface.

In the measuring device according to the above aspect, since the battery storage part has a recess corresponding to each battery, and the end holding part is also formed for each recess, it is advantageous in suppressing the battery from coming off from each recess. It is.

In the measuring device according to the aspect described above, each of the plurality of recesses may be provided with an elastic member that urges the battery housed in the recess toward one of its longitudinal directions.

In the measuring device according to the above aspect, since the battery housed in the recess is biased toward one longitudinal direction by the elastic member, it is difficult for the battery to move in the longitudinal direction within the recess. is possible. Therefore, even if vibrations or the like are applied from outside the measuring device, the state in which both ends of the battery in the longitudinal direction are held by the end holding portions is maintained.

In the measuring device according to the above aspect, the lid may have a locking piece portion formed to protrude outward in the one direction at one end in the one direction, and the case may include a locking piece portion formed to protrude outward in the one direction. A locking recess that engages the lid with the case by fitting the locking piece into a portion of the periphery of the storage portion where one end of the lid in the one direction is disposed. The measuring device may further include a screw that screws together the other end of the lid in the one direction and a portion around the battery storage section of the case, and the case may be coupled to each other by engagement by fitting the locking piece into the locking recess and screwing with the screw.

In the measuring device according to the above aspect, the lid and the case are coupled by fitting the locking piece into the locking recess and fastening with a screw, but as described above, the battery storage portion is By adopting a structure with an end holding part, multiple batteries can be kept housed in the battery compartment, so there is no need to increase the size of the locking piece or the thread diameter of the screw when the lid is closed. This prevents it from coming off the case.

Further, in the measuring device according to the above aspect, it is possible to prevent the lid from undesirably coming off from the case without increasing the thread diameter of the screw, so that it is possible to prevent the lid from undesirably coming off from the case. Suitable for securing an area for attaching a rating plate to a part.

The measuring devices according to each of the above aspects can secure a large battery capacity and securely hold the stored battery within the casing while suppressing increases in size, weight, and manufacturing costs. It is.

1 is a front view showing the external configuration of a measuring device according to an embodiment of the present invention. FIG. 3 is a rear view showing the casing section from the back side. FIG. 3 is a plan view showing the arrangement of cylindrical batteries in the battery storage section and the configuration of the periphery of the battery storage section in the case. 4 is a sectional view showing a cross section taken along the line IV-IV in FIG. 3. FIG. It is sectional drawing which shows the procedure of storing a cylindrical battery in a recessed part in order from (a) to (c). (a) is a rear view of a measuring device according to the prior art seen from the back side, and (b) is a rear view showing the arrangement of batteries accommodated in a recessed portion of a case.

Embodiments of the present invention will be described below with reference to the drawings. Note that the form described below is an example of the present invention, and the present invention is not limited to the following form in any way except for its essential configuration.

Furthermore, in the figures used in the following explanation, the X direction is the lateral direction of the casing, and the Y direction is the longitudinal direction of the casing, which corresponds to "one direction".

1. Schematic Configuration of Measuring Device 1 The schematic configuration of the measuring device 1 will be described using FIGS. 1 and 2.

The measuring device 1 is a device developed so that it can be used in plants such as oil complexes, for example, and is a device that measures the vibration intensity and surface temperature of a steam trap or steam piping in the vicinity of the steam trap. . Furthermore, the measuring device 1 according to this embodiment is a portable device carried by a worker.

As shown in FIGS. 1 and 2, the measuring device 1 includes a housing section 10, a probe 11, a display section 12, a circuit board 13, an operation switch 14, an indicator 15, and a screw 16. The housing section 10 has a flat, substantially rectangular parallelepiped shape that is elongated in the Y direction and flat in a direction perpendicular to the paper planes of FIGS. 1 and 2. When using the measuring device 1, an operator grasps both sides of the housing section 10 in the X direction.

As shown in FIG. 1, on the front surface 10a of the housing 10, a display section 12 is provided on the side from which the probe 11 protrudes, and a display section 12 is provided on the side opposite to the side from which the probe 11 protrudes. A switch 14 and an indicator 15 are provided.

Although detailed illustrations are omitted, the probe 11 includes a vibration probe for detecting the intensity of vibration of a measurement target such as a steam trap, and a temperature probe for detecting the surface temperature of the steam trap or the like. The vibration probe includes a cylindrical probe rod made of a metal material, and a vibration sensor (for example, a piezoelectric acceleration sensor) that outputs a signal according to the intensity of vibration input to the probe rod. Note that the vibration sensor is fixed to the probe rod via a pedestal made of a metal material.

The temperature probe is disposed within the cylinder hollow part of the probe rod in the vibration probe. The temperature probe has a pair of thermocouple wires. A pair of thermocouple wires are joined near the tube opening of the probe rod.

The display unit 12 is composed of, for example, a liquid crystal display panel (LCD panel) and a protective sheet that protects its surface, and displays measurement results (intensity of vibrations such as steam traps and surface temperature) and information based on the measurement results. Various information such as diagnosis results is displayed.

The operation switch 14 includes a power switch for turning on/off the power of the measuring device 1, a command switch for selecting/executing a command, a scroll switch for sending/returning data display, etc.

The indicator 15 is a power indicator that lights up when the power is turned on. Note that a configuration may be adopted in which the color temperature of the light emitted from the indicator 15 changes when the battery capacity becomes less than a predetermined capacity.

A circuit board 13 that constitutes a controller is built inside the casing 10 . The controller includes a microprocessor including an MPU/CPU, ASIC, ROM, RAM, etc., and a relatively large capacity memory. The controller calculates the intensity of vibration and the surface temperature based on the detection results from the probe 11 by executing firmware or the like stored in advance in a ROM or the like.

As shown in FIG. 2, the housing section 10 includes a case 101, a lid 102, and screws 16. The case 101 has a substantially rectangular parallelepiped shape in which the length in the Y direction is longer than the width in the X direction when viewed from above. The lid 102 is coupled to the case 101 on the rear surface 10b side of the housing section 10.

Here, the lid 102 has two locking pieces 102b and 102c. The two locking pieces 102b and 102c are formed to protrude outward from one end of the rectangular lid body 102a of the lid 102 in the Y direction. The locking piece portion 102b and the locking piece portion 102c are spaced apart from each other in the X direction. The lid 102 is coupled to the case 101 by fitting the locking pieces 102b and 102c into a locking recess (not shown) of the case 101 and by threading the screw 16.

Note that on the back surface 10b of the housing section 10, a nameplate attachment area 10c for attaching a rating nameplate is provided between the area where the lid 102 is arranged and the end surface from which the probe 11 protrudes. .

2. Battery storage section 101m in case 101
The configuration of the battery storage section 101m in the case 101 will be explained using FIGS. 3 and 4.

As shown in FIG. 3, the case 101 has a battery storage section 101m that stores four cylindrical batteries 17-20. In the battery storage portion 101m, four recesses 101a to 101d are formed in a matrix of two columns in the X direction and two rows in the Y direction. Each of the recesses 101a to 101d is a portion that is recessed inward from the back surface 10b of the housing section 10 (the front side in the paper of FIG. 3). Each of the cylindrical batteries 17-20 is individually housed in the recesses 101a-101d.

Here, in each of the recesses 101a to 101d, the opening length in the Y direction is set smaller than the length of the cylindrical batteries 17 to 20. This will be specifically explained using FIG. 4. Although FIG. 4 shows the recess 101a and the cylindrical battery 17, the same holds true for the size relationships between the other recesses 101b to 101d and the cylindrical batteries 18 to 20.

As shown in FIG. 4, a terminal 21 is provided at one end facing the recess 101a in the Y direction, and a terminal spring 22 is provided at the other end. The terminal 21 and the terminal spring 22 are electrically connected to the circuit board 13 described using FIG. When the cylindrical battery 17 is housed in the recess 101a, a protrusion (positive terminal) 17b formed to protrude in the longitudinal direction from the battery body 17a of the cylindrical battery 17 is electrically connected to the terminal 21, and the terminal spring 22 A longitudinal end surface portion (negative electrode terminal) 17c of the battery main body portion 17a is electrically connected to the battery body portion 17a.

The recess 101a is formed on the opposite side of the bottom surface 101l in the Z direction to the bottom surface 101l, which the circumferential surface of the battery main body 17a contacts or approaches when the cylindrical battery 17 is stored in the recess 101a, and has a cylindrical shape. It has an opening 101k that serves as a mouth for housing the battery 17. The length L4 of the opening 101k in the Y direction is set shorter than the total length L1 of the cylindrical battery 17 and the length L2 of the battery main body 17a. This is formed protruding along the bottom surface 101l from the opening side edges of both ends of the recess 101a in the Y direction on the opposite side in the Z direction (on the back surface 10b side of the housing section 10) with respect to the bottom surface 101l of the recessed portion 101a. This is because the eave-like end holding parts 101i and 101j are provided. The length L4 in the Y direction of the opening 101k is the dimension between the end sides of the end holding part 101i and the end holding part 101j in the Y direction.

As shown in FIG. 4, when the distance from the end of the terminal spring 22 in the Y direction to the end of the end holding part 101i when it is compressed to the maximum is L3, L1 to L4 satisfy the following relationship. It is set as follows.

L1≦L3...(Math. 1)
L2>L4...(Math 2)
By satisfying the above relational expressions 1 and 2, when the cylindrical battery 17 is housed in the recess 101a, one end 17d in the Y direction of the battery main body 17a is connected to the bottom surface 101l of the recess 101a and the end holding portion 101i, and the other end 17e is held by being sandwiched between the bottom surface 101l of the recess 101a and the end holding portion 101j.

Note that the cylindrical battery 17 housed in the recess 101a is biased in the Y direction by the terminal spring 22, so even if the above relational expression 2 is satisfied, the end holding parts 101i, 101j and the bottom surface The state in which the ends 17d and 17e of the cylindrical battery 17 are held by the cylindrical battery 101l is maintained.

Returning to FIG. 3, the case 101 is provided with a rectangular annular outer edge shelf 101e on the outer periphery of the battery accommodating portion 101m, with which the outer periphery of the lid 102 comes into contact when the lid 102 is coupled. A screw hole 101f into which the screw 16 is screwed is provided in one portion of the outer edge shelf portion 101e in the Y direction. Further, the case 101 is provided with two locking recesses 101g and 101h extending outward in the Y direction from a portion of the outer edge shelf portion 101e opposite to the Y direction screw hole 101f. The locking recesses 101g and 101h are recesses into which the locking pieces 102b and 102c of the lid 102 are fitted, respectively, when the lid 102 is coupled to the case 101.

In this embodiment, each of the cylindrical batteries 17 to 20 is an AA type manganese dry battery or an alkaline dry battery. However, the type of battery is not limited to this, and it is also possible to use, for example, a D-type, C-type, or even an AAA-type or N-type dry battery. It is also possible to use a prismatic battery.

3. Method for storing cylindrical batteries 17-20 in recesses 101a-101d A method for storing cylindrical batteries 17-20 in recesses 101a-101d in battery storage section 101m will be described with reference to FIG. Although FIG. 5 shows an example of a method of storing the cylindrical battery 17 in the recess 101a, the same applies to the method of storing the cylindrical batteries 18 to 20 in the other recesses 101b to 101d.

As shown in FIG. 5A, when storing the cylindrical battery 17 in the recess 101a, the end face portion 17c of the cylindrical battery 17 is stored in the recess 101a from the opening 101k (arrow A1). The direction in which the cylindrical battery 17 is housed in the recess 101a is such that the end face 17c of the cylindrical battery 17 faces the side of the recess 101a where the terminal spring (elastic member) 22 is provided. Note that, as shown in FIG. 5A, when storing the battery main body 17a of the cylindrical battery 17 into the recess 101a from the opening 101k, the cylindrical battery 17 is placed in an oblique position.

As shown in FIG. 5(b), at the initial stage when the cylindrical battery 17 is housed in the recess 101a, the terminal spring 22 is in a compressed state. Then, when the operator releases his hand from the cylindrical battery 17, the cylindrical battery 17 slides along the bottom surface 101l due to the biasing force in the Y direction by the terminal spring 22 until the protrusion 17b abuts the terminal 21 ( Arrow A2).

As shown in FIG. 5(c), the sliding of the cylindrical battery 17 ends when the protrusion 17b of the cylindrical battery 17 comes into contact with the terminal 21 provided in the recess 101a. Thereby, as described above, both ends 17d and 17e of the battery main body 17a of the cylindrical battery 17 are held between the bottom surface 101l of the recess 101a and the end holding parts 101i and 101j.

4. Effects In the measuring device 1 according to the present embodiment, the end holding portions 101i and 101j are formed in the battery storage portion 101m in the case 101 in correspondence with each of the cylindrical batteries 17 to 20. Even if force is applied to the plurality of cylindrical batteries 17 to 20 housed in the housing 10, the cylindrical batteries 17 to 20 may be detached from the battery storage part 101m or This prevents the cylindrical batteries 17 to 20 from moving. Therefore, in the measuring device 1, even if the size of the lid 102 becomes larger due to the number of cylindrical batteries 17 to 20 stored in the device being larger than that of the measuring device 9 of Patent Document 1, the plate of the lid 102 The cylindrical batteries 17 to 20 to be stored can be reliably held within the battery storage portion 101m without increasing the thickness or using a high-strength material for the lid 102.

Furthermore, in the measuring device 1 according to the present embodiment, the battery storage portion 101m of the case 101 has recesses 101a to 101d corresponding to the cylindrical batteries 17 to 20 stored therein, and the end holding portions 101i and 101j also have the recesses 101a. 101d, it is advantageous in preventing the cylindrical batteries 17 to 20 from coming off from the respective recesses 101a to 101d.

Further, in the measuring device 1 according to the present embodiment, the cylindrical batteries 17 to 20 housed in the recesses 101a to 101d are biased toward one side in the longitudinal direction by the terminal spring (elastic member) 22. Therefore, it is possible to make it difficult for the cylindrical batteries 17 to 20 to move in the longitudinal direction within the recesses 101a to 101d. Therefore, even if vibration or the like is applied from the outside of the measuring device 1, the state in which the end holding parts 101i and 101j hold the longitudinal ends 17d and 17e of the cylindrical batteries 17 to 20 is maintained.

Furthermore, in the measuring device 1 according to the present embodiment, the lid 102 and the case 101 are coupled by fitting the locking pieces 102b and 102c of the lid 102 into the locking recesses 101g and 101h of the case 101, and This is done by fastening with the screws 16, but as described above, by adopting the configuration in which the battery storage part 101m has the end holding parts 101i and 101j, the plurality of cylindrical batteries 17 to 20 can be stored in the battery storage part 101m. Since the closed state can be maintained, the lid 102 is prevented from coming off from the case 101 without increasing the size of the locking pieces 102b, 102c or the thread diameter of the screw 16.

Furthermore, in the measuring device 1, it is possible to prevent the lid 102 from undesirably coming off the case 101 without increasing the thread diameter of the screw 16. This is suitable for securing a nameplate affixing area 10c for affixing a rating nameplate around the area where 102 is coupled.

As described above, the measuring device 1 according to the present embodiment secures a large battery capacity while suppressing an increase in size and weight as well as an increase in manufacturing costs, and also allows the housed cylindrical batteries 17 to 20 to be housed in a housing. It is possible to securely hold it within the body part 10.

[Modified example]
In the above embodiment, cylindrical batteries are used as the batteries 17 to 20 built into the housing 10, but the present invention is not limited to this, and prismatic cylindrical batteries may be used. It is also possible.

Further, in the above embodiment, an example is given in which four cylindrical batteries 17 to 20 are built into the housing 10, but the present invention is not limited to this, and the present invention is not limited to this. It is also possible to have it built-in.

Further, in the above embodiment, the battery storage section 101m of the case 101 has four recesses 101a to 101d formed for each of the batteries 17 to 20 to be stored, but the present invention is not limited to this. Instead, it is also possible to adopt a form in which a plurality of batteries are housed in one recess. However, even in this case, it is possible to obtain the same effect as described above by providing the case with end holding portions for holding both ends of the battery main body portion of the battery in the stored state.

Further, in the above embodiment, the lid 102 is provided with two locking pieces 102b and 102c, but the present invention is not limited to this, and the present invention can be applied to a form having only one locking piece. , it is also possible to adopt a form having three or more locking pieces.

Further, in the above embodiment, one screw 16 is used to connect the lid 102 to the case 101, but the present invention may use two or more screws. Further, the screwing position can also be set in the X direction as shown in FIG. 2. Furthermore, the lid may be coupled to the case by screwing both sides in the Y direction or the X direction, without using engagement by fitting the locking piece into the locking recess.

Note that the screws used to connect the case and the lid may be screws that can be rotated once or more to complete screwing, or screws that can be rotated for less than one week to complete screwing. .

Further, in the above embodiment, the terminal spring 22 is employed as an elastic member that biases the cylindrical battery 17 in the longitudinal direction within the recess 101a, but the present invention is not limited to this, and the end face of the battery In addition to the electrode that contacts the negative electrode, an elastic member may be provided that biases the battery in its longitudinal direction.

1 Measuring device 10 Housing part 10b Back side 10c Nameplate pasting area 11 Probe 17-20 Cylindrical battery 17a Battery body part 17d, 17e End part 22 Terminal spring (elastic member)
101 Cases 101a to 101b Concave portions 101i, 101j End holding portion 101k Opening portion 101l Bottom surface 101m Battery storage portion

Claims (4)

A casing part having a substantially rectangular parallelepiped shape elongated in one direction and accommodating a plurality of batteries;
a rod-shaped or cylindrical probe that protrudes from one end surface in the longitudinal direction of the casing, and whose tip is pressed against the measurement object to measure the state of the measurement object;
Equipped with
Each of the plurality of batteries has an elongated columnar external shape,
The housing portion is
A battery that accommodates the plurality of batteries and has an opening that is recessed in the thickness direction from one main surface and whose length in the one direction is longer than the length in the direction perpendicular to the one direction. A case with a storage section,
a lid that closes the opening of the case;
has
The battery storage section has an end holding section on the side of the opening that holds both ends of each of the plurality of batteries in the longitudinal direction between the battery storage section and the bottom surface of the battery storage section.
Measuring device. The measuring device according to claim 1,
The battery storage section has a plurality of recesses in which each of the plurality of batteries is individually accommodated,
The end holding portion is formed to protrude from an edge of the recess on the opening side so as to extend along the bottom surface.
Measuring device. The measuring device according to claim 2,
Each of the plurality of recesses is provided with an elastic member that biases the battery housed in the recess in one longitudinal direction.
Measuring device. The measuring device according to any one of claims 1 to 3,
The lid has a locking piece formed at one end in the one direction to protrude outward in the one direction,
In the case, the locking piece is fitted into a portion of the periphery of the battery storage section where one end of the lid in the one direction is disposed, so that the lid is attached to the case. It has a locking recess to be engaged,
The measuring device further includes a screw that screws together the other end of the lid in the one direction and a portion of the case around the battery storage section,
The lid and the case are coupled to each other by fitting the locking piece into the locking recess and screwing the screw.
Measuring device.