JP7359887B1 - Portable measuring device - Google Patents

Abstract

The present invention provides a portable measuring device that can increase the heat dissipation efficiency of an optical module that generates a high amount of heat, thereby obtaining highly reliable measurement results. A portable measuring device 1 that performs measurements using an optical module 40 that mutually converts optical signals and electrical signals, which includes a measuring device main body 2 that performs measurements, a first base plate 21, a first a second base plate 22 facing the first base plate with an interval therebetween; a supporting portion 27 that supports the first base plate and the second base plate so that the interval between the base plates can be changed; and a cooling attachment 20 having heat sinks 28 and 29 attached to at least one of the base plate and the second base plate. The cooling attachment cools the optical module attached to the measuring device main body by sandwiching it between the first base plate and the second base plate outside the measuring device main body. [Selection diagram] Figure 1

Description

The present invention relates to a portable measuring device, and particularly to a portable measuring device having a heat dissipation structure for an optical module.

Conventionally, portable measuring devices have been used in the field to measure the communication quality of a measurement target such as a network. During measurement, the object to be measured and the measuring device are connected via an optical fiber cable and an optical-electrical conversion module (hereinafter also referred to as an optical module). The optical module is an input/output interface that mutually converts optical signals and electrical signals, and is used by being removably attached to a cage of a port provided in a measuring device.

In recent years, as communication speeds have improved, the amount of heat generated by optical modules has increased, and cooling of optical modules has become necessary (see, for example, Patent Document 1). In order to cool the optical module, a heat sink is provided on the outside of a mating cage that accommodates the optical module, or a heat sink is provided on the outer surface of the optical module. Examples of standards that define such optical modules include the QSFP-DD (Quad Small Form-factor Pluggable - Double Density) standard.

Patent Document 1 discloses a cooling attachment that has a shape that is removable from a cage into which an optical module is inserted and removed, and that includes a heat dissipation portion that comes into contact with the cage. This cooling attachment is used by occupying an adjacent cage different from the cage in which the optical module is mounted.

Japanese Patent Application Publication No. 2013-135006

Generally speaking, in stationary measurement equipment and communication equipment (for example, blade servers), the heat dissipation efficiency of optical modules, which are increasing in heat generation in recent years, is improved by increasing the size of the housing and increasing air volume with powerful cooling fans. can be increased.

However, since portable measuring devices are expected to be used on-site, they must be small and lightweight. For this reason, the size of the air guiding structure is limited in portable measuring devices, and a small cooling fan must be used, making it impossible to obtain the necessary air volume. Further, the structure described in Patent Document 1 has a limit in heat dissipation, and cannot support an optical module that generates a high amount of heat.

Additionally, a temperature threshold is set for the optical module itself, and when the temperature rises close to the threshold, it may repeatedly exceed and return to the threshold due to the influence of the ambient temperature, resulting in intermittent communication. For this reason, there is a risk that the communication performance of the measurement target may not be measured correctly, and the reliability of the measurement results may decrease due to insufficient heat radiation.

Additionally, for example, conventional optical modules were generally able to operate in an environment of around 40°C, but optical modules with high power consumption that comply with the QSFP-DD standard have a temperature of around 30°C, which is lower than the conventional temperature. It is expected that it will only be possible to operate in this environment. In addition to these environmental restrictions, it is expected that the amount of heat generated will continue to increase due to an increase in the amount of transmission, so it is necessary to improve the efficiency of heat dissipation and ensure the operating temperature range.

The present invention was made to solve the above-mentioned problems, and it is possible to improve the heat dissipation efficiency of optical modules that generate a high amount of heat even if they are portable types that cannot expand the internal space to improve cooling performance. It is an object of the present invention to provide a portable measuring device that can be used to increase the reliability of measurements and thereby obtain highly reliable measurement results.

In order to achieve the above object, the portable measuring device of the present invention is a portable measuring device (1) that performs measurements using an optical module (40) that mutually converts optical signals and electrical signals. a measuring device main body (2), a first base plate (21), a second base plate (22) facing the first base plate with an interval, the first base plate and the first base plate; a support part (27) that supports the second base plate in a manner that allows the interval to be changed; and a heat sink (28, 29) attached to at least one of the first base plate and the second base plate. an attachment (20), the cooling attachment cools the optical module mounted on the measuring device main body by sandwiching it between the first base plate and the second base plate outside the measuring device main body. It is characterized by

As described above, in the portable measuring device of the present invention, the cooling attachment connects the optical module attached to the measuring device main body to the first base plate and the second base plate to which the heat sink is attached outside the measuring device main body. It is designed to be cooled by sandwiching it between the two. With this configuration, even if the portable measuring device of the present invention is a portable measuring device whose internal space cannot be expanded to improve cooling performance, the optical module with a high heat output can be connected from the outside of the measuring device main body. Heat dissipation efficiency can be increased, and highly reliable measurement results can thereby be obtained. Further, the support portion of the cooling attachment supports the first base plate and the second base plate such that the distance between the first base plate and the second base plate can be changed. With this configuration, when the cooling attachment is attached to and detached from the optical module, the attachment/detachment operation is facilitated by increasing the distance between the first base plate and the second base plate.

Further, in the portable measuring device of the present invention, the support section may maintain a distance between the first base plate and the second base plate, and at least a distance between the first base plate and the second base plate. a first interval through which the optical module can pass; and a first interval through which the optical module mounted on the measuring device main body can be sandwiched between the first base plate and the second base plate outside the measuring device main body. The configuration may be such that the distance can be changed to the second interval.

With this configuration, the portable measuring device of the present invention allows the cooling attachment to be attached to the measuring device main body by changing the distance between the first base plate and the second base plate to the second distance. The optical module thus obtained can be cooled by being sandwiched between a first base plate and a second base plate to which a heat sink is attached outside the measuring device main body. Therefore, the portable measuring device of the present invention can improve the heat dissipation efficiency of an optical module with a high calorific value, even if it is a portable measuring device whose internal space cannot be expanded to improve cooling performance. Thereby, highly reliable measurement results can be obtained. Further, the optical module is placed between the first base plate and the second base plate by passing between the first base plate and the second base plate with the gap between the first base plate and the second base plate widened (first gap). Since the first base plate and the second base plate can be used in a narrowed state (second gap), the cooling attachment can be easily attached and detached according to the size of the optical module. .

In the portable measuring device of the present invention, the support section may move the first base plate to the second base plate such that the first base plate and the second base plate elastically sandwich the optical module. It may be configured to include a biasing portion (24) that biases in the direction of the plate.

With this configuration, the portable measuring device of the present invention can securely sandwich the optical module between the first base plate and the second base plate according to the size of the optical module. Heat can be reliably transferred to the heat sink attached to the plate and the second base plate. This makes it possible to improve the heat dissipation efficiency of the optical module that generates a high amount of heat, thereby making it possible to obtain highly reliable measurement results.

In the portable measuring device of the present invention, the support section has one end fixed to the second base plate and the other end inserted into a guide hole (21b) provided in the first base plate. 23), and a first fixed stopper (26a) and a second fixed stopper (26c) each fixed to the column at the other end side of the column at a distance from each other in the longitudinal direction of the column. Furthermore, the first base plate may be configured to be movable along the support column within a predetermined movable range between the first fixed stopper and the second fixed stopper.

With this configuration, a support portion that supports the first base plate and the second base plate so that the distance between the first base plate and the second base plate can be changed can be realized with a simple configuration.

In the portable measuring device of the present invention, the support section is provided along the support column between either one of the first fixed stopper and the second fixed stopper and the first base plate. The structure may further include a spring (25).

With this configuration, the portable measuring device of the present invention can widen the distance between the first base plate and the second base plate with restoring force by a simple configuration using a spring, and The second base plate can elastically sandwich the optical module.

In the portable measuring device of the present invention, the heat sink is attached to at least a surface of the first base plate opposite to the surface facing the second base plate, and the cooling attachment is attached to the optical module. The first base plate may be configured to come into contact with a heat radiation part (44) provided on an outer surface of a module main body of the optical module when the optical module is mounted.

With this configuration, the portable measuring device of the present invention can efficiently cool the heat dissipation section attached to the outer surface of the module main body that is exposed to the outside when the module main body is attached to the measuring device main body.

The portable measuring device of the present invention further includes an in-casing heat sink (15) provided inside the casing (10) of the measuring device main body, and a fan (16) attached to the casing. It may be.

With this configuration, the portable measuring device of the present invention can further efficiently cool the optical module.

In the portable measuring device of the present invention, the cooling attachment includes a first connecting portion (21a) for connecting the cooling attachment to the measuring device main body when the optical module is attached to the measuring device main body, The in-casing heat sink may include a second connecting portion (15b) for connecting with the first connecting portion.

With this configuration, the portable measuring device of the present invention can fix the cooling attachment to the measuring device main body, and can thermally couple the cooling attachment and the heat sink in the housing. Thereby, heat from the heat radiating portion of the optical module exposed to the outside of the measuring device main body can be radiated from the heat sink inside the housing, so that the optical module can be cooled more efficiently.

The cooling attachment of the present invention is a cooling attachment (20) for an optical module used together with a portable measuring device (1) that performs measurements using an optical module (40) that mutually converts optical signals and electrical signals. , a first base plate (21), a second base plate (22) facing the first base plate with an interval, and the first base plate and the second base plate, A support part (27) that supports the interval so as to be changeable, and a heat sink (28, 29) attached to at least one of the first base plate and the second base plate, and performs measurement. The optical module mounted on the measuring device main body is cooled by being sandwiched between the first base plate and the second base plate outside the measuring device main body.

As described above, in the cooling attachment of the present invention, the optical module attached to the measuring device main body is sandwiched between the first base plate and the second base plate to which the heat sink is attached outside the measuring device main body. It is designed to be cooled down. With this configuration, the cooling attachment of the present invention can improve the heat dissipation efficiency of optical modules with high heat generation from the outside of the measuring device itself, even in portable measuring devices whose internal space cannot be expanded to improve cooling performance. can be improved, thereby obtaining highly reliable measurement results. Further, the support portion of the cooling attachment supports the first base plate and the second base plate so that the distance between the first base plate and the second base plate can be changed. With this configuration, when the cooling attachment is attached to and detached from the optical module, the distance between the first base plate and the second base plate is widened, thereby making it easier to attach and detach the cooling attachment to the optical module.

According to the present invention, even if it is a portable type optical module whose internal space cannot be expanded to improve cooling performance, it is possible to increase the heat dissipation efficiency of an optical module that generates a high amount of heat, thereby providing highly reliable measurement results. It is possible to provide a portable measuring device that can obtain the following.

1 is a diagram showing a schematic configuration of a portable measuring device according to an embodiment of the present invention. (a) is a plan view of the cooling attachment in FIG. 1, and (b) is a sectional view taken along line AA in FIG. 2(a). It is a figure showing the support structure of a cooling attachment. FIG. 3 is a diagram showing a connection structure between a first base plate and an in-casing heat sink. 5(a) is a diagram showing a schematic structure of the measuring device main body of the portable measuring device, and FIG. 5(b) is a view taken in the direction of arrow B in FIG. 5(a). FIG. 2 is a perspective view showing the configuration of an optical module. It is a figure showing the schematic structure of the cooling attachment concerning another embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing a schematic configuration of a portable measuring device 1 according to a first embodiment of the present invention. The portable measurement device 1 according to this embodiment measures the communication quality of a measurement target such as a network via an optical module 40 that serves as an input/output interface that mutually converts optical signals and electrical signals. Specifically, as shown in FIG. 1, a portable measuring device 1 is removably attached to a measuring device main body 2 that measures the communication quality of a measurement target and an optical module 40, and cools the optical module 40. A cooling attachment 20 is provided.

[Measuring device body]
First, the measuring device main body 2 will be explained.

FIG. 5(a) is a diagram showing the structure of the measuring device main body 2 of the portable measuring device 1, and FIG. 5(b) is a view taken in the direction of arrow B in FIG. 5(a). As shown in FIG. 5(a), the measuring device main body 2 includes a housing 10, a port 11, a cage 12, an electrical connector 13, an in-housing sheet sink 15, a cooling fan 16, and an air guide plate 17. There is. In FIG. 5(a), illustration of the signal processing section, display section, operation section, etc. is omitted.

The port 11 has a cage 12 in the shape of a rectangular parallelepiped with an opening on one side of the housing 10, and an electrical connector 13 provided on the back side of the cage 12, so that the optical module 40 can be inserted and removed. It has become. When the optical module 40 is installed in the port 11, the electrical connector 42 (see FIG. 6) on the optical module 40 side is electrically connected to the electrical connector 13.

The in-casing heat sink 15 is a heat sink provided inside the housing 10 with the bottom surface 15 a in contact with one side of the cage 12 . As a result, heat generated from the optical module 40 housed in the cage 12 is radiated from the in-casing heat sink 15 via the cage 12.

The cooling fan 16 is attached to one surface of the casing 10, for example, on a surface opposite to the casing surface on which the port 11 is provided. The cooling fan 16 takes in outside air into the casing 10 and sends the air toward the casing heat sink 15, thereby cooling the casing heat sink 15 (indicated by the broken line in FIG. 1). (see arrow). Alternatively, the cooling fan 16 may cool the heat sink 15 inside the case by discharging the air inside the case 10 to the outside and taking in air from the side of the case where the port 11 is provided.

The air guide plate 17 is provided as a guide for efficiently guiding air to the in-casing heat sink 15 inside the housing 10 during air cooling by the cooling fan 16 .

As shown in FIG. 5B, two slots 10a and 10b are formed on the surface of the casing 10 where the port 11 is provided, with the port 11 interposed therebetween. When using the cooling attachment 20, the end of the first base plate 21 on the measuring device main body 2 side is passed through the slot 10a, and the end of the second base plate 22 on the measuring device main body 2 side is inserted into the slot 10b. It is now possible to pass. Thereby, the cooling attachment 20 can be fixed to the measuring device main body 2. Note that in FIG. 5(b), illustration of other terminals, ports, and other components is omitted.

In this embodiment, the cooling attachment 20 is fixed to the measuring device main body 2, but the configuration is not limited to this, and the cooling attachment 20 is attached to the optical module 40, and the cooling attachment 20 and the measuring device main body 2 are A configuration in which they are not connected may also be used.

[Optical module]
Next, the optical module 40 will be explained.

FIG. 6 is a perspective view showing a configuration example of the optical module 40. Although the optical module 40 shown in FIG. 6 is an optical module according to the QSFP-DD standard, the standard of the optical module is not limited to this, and as long as the cooling attachment 20 according to the present embodiment is applicable, any communication It may be a standard optical module. The optical module 40 functions as an input/output interface that mutually converts optical signals and electrical signals, and can be attached to and detached from the port 11 provided in the measuring device main body 2 of the portable measuring device 1.

As shown in FIG. 6, the optical module 40 includes a module body 41, an electrical connector 42, an optical connector 43, a heat dissipation section 44, and a pull tab 45. The pull tab 45 is used when pulling out the optical module 40 from the cage 12 of the port 11 provided in the measuring device main body 2.

The optical connector 43 is provided at one end of the module body 41, and is connected to an optical connector formed at the end of an optical fiber cable (not shown). Further, the electrical connector 42 is provided at the other end of the module main body 41 and is electrically connected to the electrical connector 13 provided deep inside the cage 12 on the measuring device main body 2 side.

The optical module 40 receives the optical signal transmitted from the measurement target via the optical fiber cable via the optical connector 43, converts it into an electrical signal, and processes the signal on the measurement device main body 2 side via the electrical connector 42. It will be sent to the department. Further, the optical module 40 receives the electrical signal generated by the portable measuring device 1 via the electrical connector 42, converts it into an optical signal, and sends it to the optical fiber cable via the optical connector 43. There is.

The heat radiating section 44 is attached to the side surface of the module body 41 corresponding to the heat generating section of the optical module 40, and is configured to radiate heat generated by the heat generating section of the optical module 40. This heat dissipation section 44 is located outside the casing 10 of the measuring device main body 2 when the optical module 40 is mounted on the cage 12.

[Cooling attachment]
Next, the cooling attachment 20 will be explained.

2(a) is a plan view of the cooling attachment 20, and FIG. 2(b) is a sectional view taken along line AA in FIG. 2(a). As shown in FIGS. 1, 2(a) and 2(b), the cooling attachment 20 includes a first base plate 21 and a second base plate 22 facing the first base plate 21 with a space therebetween. and a support part 27 that supports the first base plate 21 and the second base plate 22 so that the interval between the first base plate 21 and the second base plate 22 can be changed; It includes a heat sink 28 attached and a heat sink 29 attached to the second base plate 22. The cooling attachment 20 is configured to cool the optical module 40 attached to the measuring device main body 2 by sandwiching it between the first base plate 21 and the second base plate 22 outside the measuring device main body 2. In this specification, "sandwiching" refers to "sandwiching" with physical contact.

The first base plate 21 and the second base plate 22 have approximately the same size, and when viewed from above, one side is the width in the lateral direction of the optical module 40 (i.e., the module body in which the heat dissipation section 44 is provided in FIG. 6). 41), and is made of a metal such as aluminum, iron, or copper, which has good heat transfer properties. However, the planar shape of the first base plate 21 and the second base plate 22 is not limited to a rectangle, and may be any planar shape. The first base plate 21 may be a separate member from the heat sink 28, or may be configured integrally with the heat sink 28. Similarly, the second base plate 22 may be formed as a separate member from the heat sink 29, or may be formed integrally with the heat sink 29. In this embodiment, the first base plate 21 and the second base plate 22 are plate-shaped members, but are not limited to the plate shape, and may have other shapes such as a net shape or a lattice shape.

The heat sinks 28 and 29 have, for example, a rectangular parallelepiped shape or a cubic shape, are made of a metal such as aluminum, iron, or copper that has good heat transfer characteristics, and are provided with a plurality of fins for efficient heat radiation. The heat sink 28 is attached to the surface of the first base plate 21 opposite to the side facing the second base plate 22. The heat sink 29 is attached to the surface of the second base plate 22 opposite to the side facing the first base plate 21 .

In this embodiment, two heat sinks 28 and 29 are used, but the number is not limited to this, and only one of the heat sinks 28 and 29 may be used, or three or more heat sinks may be used. . Each of the first and second base plates 21 and 22 may be provided with a plurality of heat sinks. Further, in this embodiment, the heat sinks 28 and 29 are attached to the surfaces opposite to the opposing sides of the first and second base plates 21 and 22, respectively, but the surfaces to which they are attached are limited to this. Instead, the first and second base plates 21 and 22 may be attached to opposing surfaces.

The support part 27 is configured to support the first base plate 21 and the second base plate 22 so that the distance between the first base plate 21 and the second base plate 22 can be adjusted within a predetermined range. . Specifically, the support portion 27 allows the optical module 40 to pass through at least the space between the first base plate 21 and the second base plate 22. A first interval that allows the optical module 40 attached to the measuring device main body 2 to be sandwiched between the first base plate 21 and the second base plate 22 outside the measuring device main body 2. and can be changed to . As a result, the optical module 40 is passed between the first base plate 21 and the second base plate 22 with the interval between the first base plate 21 and the second base plate 22 being widened (first interval). Since the first base plate 21 and the second base plate 22 can be placed between the base plates and used with a narrowed interval (second interval), it is possible to adjust the size of the optical module 40 to suit the size of the optical module 40. The cooling attachment 20 can be easily attached and detached.

More specifically, the support section 27 includes four columns 23 and a biasing section 24 provided at the top of each column 23. Each support column 23 has one end fixed to the second base plate 22 and the other end inserted into a guide hole 21b provided in the first base plate 21. The biasing section 24 is
The first base plate 21 and the second base plate 22 are configured to bias the first base plate 21 toward the second base plate 22 so that the optical module 40 is elastically sandwiched between the first base plate 21 and the second base plate 22 .

FIG. 3 is a diagram showing the support structure of the cooling attachment 20. As shown in FIGS. 2 and 3, the biasing section 24 of the support section 27 is connected to a first fixed stopper 26a and a first fixed stopper 26a fixed at the upper part (other end side) of each support column 23 with an interval in the longitudinal direction. 2 fixed stoppers 26c. The support portion 27 includes a movable stopper 26b that is movably provided between a first fixed stopper 26a and a second fixed stopper 26c. A spring 25 is provided along the support column 23 between the first fixed stopper 26a and the movable stopper 26b. The spring 25 biases the first base plate 21 toward the second base plate 22 so that the optical module 40 is elastically sandwiched between the first base plate 21 and the second base plate 22. It has become. This allows the first base plate 21 to move along the column 23 under the action of restoring force within a predetermined movable range between the first fixed stopper 26a and the second fixed stopper 26c. ing.

With the above configuration, the support part 27 supports the first base plate 21 and the second base plate 22 such that the distance between the first base plate 21 and the second base plate 22 can be adjusted within a predetermined range. Therefore, the optical module 40 can be reliably sandwiched between the first base plate 21 and the second base plate 22 according to the size of the optical module 40. Thereby, heat can be reliably transferred from the optical module 40 to the first and second heat sinks 28 and 29 via the first and second base plates 21 and 22. Thereby, the heat dissipation efficiency of the optical module 40, which generates a high amount of heat, can be increased, thereby making it possible to obtain highly reliable measurement results. Moreover, the distance between the first base plate 21 and the second base plate 22 can be widened with restoring force, and the first base plate 21 and the second base plate 22 sandwich the optical module 40 elastically. be able to.

In the portable measuring device 1 according to the present embodiment, when the cooling attachment 20 is attached to the optical module 40, the first base plate 21 provided with the heat sink 28 is attached to the outer surface of the module body 41 of the optical module 40. The heat dissipating portion 44 is brought into contact with the heat dissipating portion 44 . With this configuration, it is possible to efficiently cool the heat dissipation section 44 attached to the outer surface of the module body 41 that is exposed to the outside when attached to the measuring device body 2.

The portable measuring device 1 according to the present embodiment has an in-housing heat sink 15 provided inside the casing 10 of the measuring device main body 2, a cooling fan 16 attached to the casing 10, and a cooling fan 16. It is equipped with a baffle plate 17 that guides airflow. With this configuration, the optical module 40 can be cooled more efficiently.

FIG. 4 is a diagram showing a connection structure between the first base plate 21 and the in-casing heat sink 15. The cooling attachment 20 is connected to the first base plate 21 as a first connecting portion for connecting the cooling attachment 20 to the measuring device main body 2 when the optical module 40 is attached to the port 11 provided in the measuring device main body 2. It has an end portion 21a on the measuring device main body 2 side. Further, the in-casing heat sink 15 includes a recess 15b provided in the end surface of the in-casing heat sink 15 as a second connecting part for connecting with the end part 21a as the first connecting part.

When the optical module 40 is attached to the port 11 of the measuring device main body 2, the end 21a of the first base plate 21 can be removed through the slot 10a of the housing 10 into the recess 15b of the end surface of the heat sink 15 inside the housing. to fit. The end of the second base plate 22 on the measuring device main body 2 side is inserted into the housing 10 through the slot 10b of the housing 10.

With this configuration, the cooling attachment 20 is firmly fixed to the measuring device main body 2, and the first base plate 21 and the in-casing heat sink 15 are thermally connected. Thereby, the heat from the heat radiating section 44 of the optical module 40 exposed to the outside of the measuring device main body 2 can be radiated from the heat sink 15 inside the housing, so the optical module 40 can be cooled more efficiently. .

(effect)
As explained above, in the portable measuring device 1 according to the present embodiment, the cooling attachment 20 connects the optical module 40 attached to the port 11 provided in the measuring device main body 2 to a heat sink outside the measuring device main body 2. The heat sink 28 is sandwiched between a first base plate 21 to which a heat sink 28 is attached and a second base plate 22 to which a heat sink 29 is attached for cooling. With this configuration, even in a portable measuring device whose internal space cannot be expanded to improve cooling performance, it is possible to increase the heat dissipation efficiency of the optical module 40, which generates a high amount of heat, from the outside of the measuring device main body 2. , thereby making it possible to obtain highly reliable measurement results.

Moreover, the portable measuring device 1 of this embodiment is configured such that the support part 27 of the cooling attachment 20 supports the first base plate 21 and the second base plate 22 so that the interval between the base plates can be changed. It has become. With this configuration, when the cooling attachment 20 is attached to and detached from the optical module 40, the attachment/detachment operation is facilitated by increasing the distance between the first base plate 21 and the second base plate 22.

In the portable measuring device 1 of the present embodiment, the support section 27 supports the first base plate 21 so that the first base plate 21 and the second base plate 22 elastically sandwich the optical module 40. The base plate 22 is provided with a biasing portion 24 that biases the base plate 22 in the direction of the second base plate 22 . With this configuration, the optical module 40 can be firmly sandwiched between the first base plate 21 and the second base plate 22 according to the size of the optical module 40, so that the first base plate 21 and the second Heat can be reliably transferred to the heat sinks 28 and 29 attached to the base plate 22 of No. 2. Thereby, the heat dissipation efficiency of the optical module 40, which generates a high amount of heat, can be increased, thereby making it possible to obtain highly reliable measurement results.

In the portable measuring device 1 of the present embodiment, when the optical module 40 is attached to the port 11 provided in the measuring device main body 2, the cooling attachment 20 The portion 21a is adapted to fit into a recess 15b of an in-casing heat sink 15 provided in the measuring device main body 2. With this configuration, the cooling attachment 20 can be fixed to the measuring device main body 2, and the cooling attachment 20 and the in-casing heat sink 15 can be thermally coupled. Thereby, the heat from the heat radiating section 44 of the optical module 40 exposed to the outside of the measuring device main body 2 can be radiated from the heat sink 15 inside the housing, so the optical module 40 can be cooled more efficiently. .

(Second embodiment)
Next, a portable measuring device 1 according to a second embodiment of the present invention will be described with reference to the drawings.

The portable measuring device 1 according to the second embodiment differs from the first embodiment in the configuration of the support portion 27A of the cooling attachment 20A. The other configurations are the same as those in the first embodiment, and the same configurations are denoted by the same reference numerals, and detailed explanations will be omitted as appropriate.

FIG. 7 is a diagram showing a schematic configuration of a cooling attachment 20A according to the second embodiment of the present invention. As shown in FIG. 7, the cooling attachment 20A according to the present embodiment includes a first base plate 21A to which a heat sink 28 is attached, a second base plate 22A to which a heat sink 29 is attached, and first and second base plates 21A to which a heat sink 28 is attached. The support portion 27A supports the base plates 21A and 22A. The support portion 27A supports the first base plate 21 and the second base plate 22 so that the interval or relative position between the two base plates can be changed so that the cooling attachment 20A can be attached to and detached from the optical module 40. It is configured.

Specifically, the support portion 27A includes a first rotating portion 27A1 extending at a predetermined angle from one end edge of the first base plate 21A, and a first rotating portion 27A1 extending at a predetermined angle from one end edge of the second base plate 22A. The second rotating part 27A2 has a second rotating part 27A2, a first gripping part 27A3 following the first rotating part 27A1, and a second gripping part 27A4 following the second rotating part 27A2. The first rotating portion 27A1 and the second rotating portion 27A2 are rotatable in mutually opposite directions about a common shaft portion 27A5 provided at their respective intermediate portions. The first rotating portion 27A1 and the second rotating portion 27A2 are connected, for example, by a spring 27A6, as shown in FIG. The spring 27A6 may connect the gripping portion side of the first rotating portion 27A1 and the gripping portion side of the second rotating portion 27A2. Further, the support portion 27A includes a stopper 27A7 that limits the rotation angle of the first and second rotation portions 27A1 and 27A2.

With this configuration, when the first grip part 27A3 and the second grip part 27A4 are gripped and the distance between them is widened against the restoring force of the spring 27A6, the first rotation part 27A1 and the second rotation part The moving parts 27A2 rotate in opposite directions about the shaft part 27A5, and the distance between the first base plate 21A and the second base plate 22A becomes wider. In this state, the optical module 40 is placed in the space between the first base plate 21A and the second base plate 22A from the side. Then, when the first gripping part 27A3 and the second gripping part 27A4 are released, the first base plate 21A and the second base plate 22A move in the direction where the distance between them becomes narrower due to the restoring force of the spring 27A6, and the optical module 40 can be elastically sandwiched and cooled.

In this way, the portable measuring device 1 of the present embodiment can effectively increase the heat dissipation efficiency of the optical module 40 even if it is a portable measuring device whose internal space cannot be expanded to improve cooling performance. It is possible to obtain highly reliable measurement results. Further, the cooling attachment 20A can be easily attached to and detached from the optical module 40 by a simple operation of grasping and releasing the first and second gripping parts 27A3 and 27A4.

As described above, the present invention can improve the heat dissipation efficiency of optical modules that generate a high amount of heat even in portable measuring devices whose internal space cannot be expanded to improve cooling performance. This has the effect that highly reliable measurement results can be obtained, and is useful for portable measuring devices in general.

1 Portable measuring device 2 Measuring device main body 10 Housing 10a, 10b Slot 11 Port 12 Cage 13 Electrical connector 15 Heat sink inside the housing 15a Bottom surface 15b Recess (second connecting portion)
16 Fan 17 Air guide plate 20, 20A Cooling attachment 21, 21A First base plate 21a End portion (first connecting portion)
21b Guide hole 22, 22A Second base plate 23 Support column 24 Biasing part 25 Spring 26a, 26c Fixed stopper 26b Movable stopper 27, 27A Support part 27A1, 27A2 Rotating part 27A3, 27A4 Grip part 27A5 Shaft part 27A6 Spring 27A7 Stopper 28, 29 heat sink 40 optical module 41 module main body 42 electrical connector 43 optical connector 44 heat dissipation part 45 pull tab

Claims (9)

A portable measuring device (1) that performs measurements using an optical module (40) that mutually converts optical signals and electrical signals,
A measuring device main body (2) that performs measurement;
A first base plate (21), a second base plate (22) facing the first base plate with a gap between them, and a second base plate (22) that connects the first base plate and the second base plate with the gap between them. a cooling attachment (20) having a changeably supporting support (27) and a heat sink (28, 29) attached to at least one of the first base plate and the second base plate;
Portable measurement characterized in that the cooling attachment cools the optical module attached to the measuring device main body by sandwiching it between the first base plate and the second base plate outside the measuring device main body. Device. The supporting portion defines a distance between the first base plate and the second base plate, at least a first distance that allows the optical module to pass between the first base plate and the second base plate. and a second interval in which the optical module mounted on the measuring device main body can be sandwiched between the first base plate and the second base plate outside the measuring device main body. , The portable measuring device according to claim 1. The support section is configured to bias the first base plate toward the second base plate so that the optical module is elastically sandwiched between the first base plate and the second base plate. Portable measuring device according to claim 1 or 2, comprising a section (24). The support section includes a support column (23) whose one end is fixed to the second base plate and whose other end is inserted into a guide hole (21b) provided in the first base plate, and the other end of the support column. The first base plate further includes a first fixed stopper (26a) and a second fixed stopper (26c) respectively fixed to the column at a distance from each other in the longitudinal direction of the column at the side, 4. The portable measuring device according to any one of 1 to 3, wherein the portable measuring device is movable along the column within a predetermined movable range between the first fixed stopper and the second fixed stopper. The support section further includes a spring (25) provided along the support column between either one of the first fixed stopper and the second fixed stopper and the first base plate. The portable measuring device according to item 4. The heat sink is attached to at least a surface of the first base plate opposite to a surface facing the second base plate, and when the cooling attachment is attached to the optical module, the heat sink is attached to the first base plate. The portable measuring device according to any one of claims 1 to 5, wherein the plate abuts a heat radiation part (44) provided on an outer surface of a module body of the optical module. The measuring device according to any one of claims 1 to 6, further comprising: an in-casing heat sink (15) provided inside a casing (10) of the measuring device main body; and a fan (16) attached to the casing. Portable measuring device as described in section. The cooling attachment includes a first connection portion (21a) for connecting the cooling attachment to the measurement device main body when the optical module is attached to the measurement device main body, and the in-casing heat sink The portable measuring device according to claim 7, comprising a second coupling part (15b) for coupling with the coupling part. A cooling attachment (20) for the optical module used with a portable measuring device (1) that performs measurements using an optical module (40) that mutually converts optical signals and electrical signals,
a first base plate (21);
a second base plate (22) facing the first base plate with a space therebetween;
a support part (27) that supports the first base plate and the second base plate so that the interval can be changed;
A heat sink (28, 29) attached to at least one of the first base plate and the second base plate,
A cooling attachment characterized in that the optical module mounted on a measuring device main body that performs measurement is cooled by being sandwiched between the first base plate and the second base plate outside the measuring device main body.

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