Numerical control device

Abstract

A numerical control device according to the present disclosure comprises: a housing of the numerical control device; and a display device attached to the housing of the numerical control device. The numerical control device further comprises a plurality of wireless transceivers, including a first wireless transceiver provided on the housing of the numerical control device and a second wireless transceiver provided on the display device. The second wireless transceiver is capable of communicating with the first wireless transceiver by being within a communication range of the first wireless transceiver.

Description

TECHNICAL AREA The present disclosure relates to a numerical control device (numerical control device). STATE OF THE ART JP 2019-082908 A discloses a numerical control device equipped with a display. According to the disclosure, the numerical control device equipped with a display comprises a main body of the numerical control device and a display device that is attachable to and detachable from the main body of the numerical control device. Furthermore, according to the disclosure, the main body of the numerical control device equipped with a display can be used in a numerical control device. SUMMARY OF THE INVENTION There is a need for a numerical control device with higher reliability. The object of the present invention is to overcome the aforementioned challenges. One aspect of the present disclosure is characterized by a numerical control device comprising a main body of the numerical control device and a display device attached to the main body of the numerical control device, wherein the numerical control device comprises a plurality of wireless transmitter-receivers, including a first wireless transmitter-receiver provided in the main body of the numerical control device and a second wireless transmitter-receiver provided in the display device, wherein the second wireless transmitter-receiver is configured to communicate with the first wireless transmitter-receiver by being within a communication range of the first wireless transmitter-receiver. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective rear view of a numerical control device according to one embodiment; Fig. 2 is a perspective exploded view of the numerical control device shown in Fig. 1; Fig. 3 is a perspective exploded view of a display device shown in Fig. 2; Fig. 4 is a perspective front view of a main body of the numerical control device; Fig. 5 is another perspective exploded view of the display device; Fig. 6 is another perspective exploded view of the numerical control device; Fig. 7 is a perspective view illustrating a display device according to exemplary modification 1; Fig. 8 is a perspective view of a main body of the numerical control device according to exemplary modification 2; Fig. 9 is a top view showing a first wireless transceiver shown in Fig. 8; Fig.Figure 10 is a perspective view illustrating part of a display device according to exemplary embodiment 2; and Figure 11 is a rear perspective view of a display device according to exemplary embodiment 3. DETAILED DESCRIPTION OF THE INVENTION A prior art display device comprises a connector (see also JP 2019-082908 A). The connector is electrically connected to the main body of a numerical control device. The main body of the numerical control device supplies the display device with electrical power via the connector. The main body of the numerical control device provides a control signal to the display device via the connector. The control signal is an electrical signal used to control the display device. Vibrations can act on a connector that electrically connects the main body of the numerical control device and the display device. For example, a numerical control device comprising the main body and the display device is intended for use with a machine tool. The machine tool generates vibrations during its operation. These vibrations propagate to the main body of the numerical control and the display device to which the main body is attached. Consequently, a force (shock) caused by the vibrations acts on the connector that electrically connects the main body of the numerical control and the display device. Therefore, according to the prior art, the numerical control requires a design to protect the connector from vibration shocks. Furthermore, the user of the numerical control device must press the connector into the numerical control device with relatively considerable force to insert it into the main body of the numerical control device. When the display device is separated from the main body of the numerical control device, the user must exert relatively considerable force to release the connection between the connector and the main body of the numerical control device. Based on the preceding introductory description, an embodiment is described below. [Version] It should be noted that the X-direction (left-right direction) used in the following description is a direction parallel to a horizontal plane. The X-direction comprises an X1 direction, which, viewed from the front, represents the right direction, and an X2 direction, which represents the left direction. Furthermore, the Y-direction (vertical direction) used in the following description is a direction perpendicular to a horizontal plane. The Y-direction comprises a Y1 direction, which points upwards, and a Y2 direction, which points downwards (direction of gravity). Finally, the Z-direction (forward-backward direction) used in the following description is a direction parallel to a horizontal plane and perpendicular to the X-direction. The Z-direction comprises a Z1 direction, which points forwards, and a Z2 direction, which points backwards. Fig. 1 is a perspective rear view of a numerical control device 10 according to one embodiment. Fig. 2 is a perspective exploded view of the numerical control device 10 shown in Fig. 1. Fig. 3 is a perspective exploded view of the display device 14 shown in Fig. 2. The numerical control device 10 is provided in a machine tool (not shown). The machine tool is, for example, a machining center, but this is not limited to such a tool. As shown in Figs. 1 and 2, the numerical control device 10 comprises a main body 12 of the numerical control device and the display device 14. As shown in Fig. 2, the main body 12 of the numerical control device comprises a housing 16 and several control boards 18 (181, 182). The housing 16 is made, for example, of resin (plastic). The housing 16 accommodates the several control boards 18. The multiple control boards (control substrates) 18 include a backboard 181. The control boards 182, with the exception of the backboard 181, are connected to the backboard 181. Accordingly, the multiple control boards 182 can be interconnected via the backboard 181. Control circuits (not shown) are mounted on the multiple control boards 18. The control circuits comprise an electrical circuit (an electronic circuit) for controlling a machine tool (not shown). That is, the control circuits comprise an electrical circuit for controlling a spindle, a table, and the like, which are provided in a machine tool (not shown). The control circuits generate a control signal (display control signal) for controlling the display device 14. The display device 14 is a separate device from the main body 12 (housing 16) of the numerical control device. The display device 14 can be attached to and detached from the housing 16, for example, by means of a pair of detent devices 20 (38, 40). The display device 14 has a front part 14a, a rear part 14b, and a display circuit board 22. The front section 14a includes a screen (not shown). The screen is, for example, a liquid crystal display, but is not limited to this. The front section 14a may include a touch panel (not shown). The touch panel can be used by an operator to input a command to the machine tool described above. The rear part 14b includes a backplate 24. The backplate 24 can be attached to and removed from the display device 14. The material of the backplate 24 is, for example, metal, but is not limited to this. In the rear section 14b (back plate 24), a communication opening 26 and a current receiving opening 28 are formed (Figs. 2 and 3). As shown in Fig. 3, several communication openings 26 (26A, 26B) can be formed in the rear section 14b. In addition, several current receiving openings 28 (28A, 28B) can be formed in the back plate 24. The communication opening 26 and the current receiving opening 28 will be described in more detail later. The display circuit substrate 22 is located between the front part 14a and the rear part 14b (back plate 24). A display circuit 22c is mounted on the display circuit substrate 22. The display circuit 22c is a circuit that performs processing based on a control signal received from the main part 12 of the numerical control device. This processing includes, for example, processing to display information on the front part 14a (display screen). It should be noted that in Figures 2 and 3, a portion of the display circuit 22c is shown, which is located in the current receiving opening 28. As shown in Figures 2 and 3, the numerical control device 10 further comprises a plurality of wireless transceivers 30 (301, 302, 303). Each of the plurality of wireless transceivers 30 is a communication module capable of wireless communication. The wireless communication carried out by the wireless transceivers 30 is, for example, short-range point-to-point wireless communication. Each of the multiple wireless transceivers 30 has one or more antennas 32. In the present embodiment, a case is described in which each of the wireless transceivers 30 comprises two antennas 32. The two antennas 32 comprise, for example, one antenna 32 for signal transmission and one antenna 32 for signal reception. The two antennas 32 are provided on separate chips, but are not limited to this.Furthermore, a single antenna 32 can have both the function of antenna 32 for signal transmission and the function of antenna 32 for signal reception. As shown in Fig. 2 and Fig. 3, the multiple wireless transceivers 30 comprise a first wireless transceiver 301, a second wireless transceiver 302 and a third wireless transceiver 303. The first wireless transceiver 301 is provided in the main body 12 of the numerical control device. The first wireless transceiver 301 transmits a control signal generated by the main body 12 of the numerical control device. The first wireless transceiver 301 can be housed in the enclosure 16. The first wireless transceiver 301 can be mounted on one of the several control boards 18. The control board 18 on which the first wireless transceiver 301 is mounted is, for example, the backplane board 181, but is not limited to this. The second wireless receiver 302 and the third wireless receiver 303 are provided in the display device 14. For example, the second wireless receiver 302 and the third wireless receiver 303 are located on the display circuit substrate 22. Both the second wireless receiver 302 and the third wireless receiver 303 are capable of receiving the control signal because they are within the communication range of the first wireless receiver 301. The control signal received by at least one of the wireless receivers 302 or the third wireless receiver 303 is forwarded to the display circuit 22c. The second wireless receiver 302 or the third wireless receiver 303 can send a signal (output signal) to the first wireless receiver 301 if required.The output signal transmitted by the display device 14 via the second wireless transceiver 302 or the third wireless transceiver 303 includes a signal indicating the content of a user action, for example, in response to the user action on the touch panel described above. The display device 14 may include an external memory port (not shown) to which external memory can be connected. The external memory may include, for example, a memory card, a USB (Universal Serial Bus) flash memory, and the like. Therefore, the external memory port may include, for example, a memory card slot (memory card reader), a USB port, and the like. The output signal includes a signal indicating information (external memory data) stored in the external memory connected to the external memory port. As shown in Fig. 3, the positions of the second wireless transceiver 302 and the third wireless transceiver 303 are separated to a certain extent. A more detailed description of the positional relationship between the second wireless transceiver 302 and the third wireless transceiver 303 follows later. As shown in Figures 2 and 3, the second wireless transceiver 302 is preferably located within the first communication opening 26A, viewed in the Z2 direction (viewed in the Z direction). The first communication opening 26A is one of several communication openings 26. As shown in Figure 3, the third wireless transceiver 303 is preferably located within the second communication opening 26B, viewed in the Z2 direction (viewed in the Z direction). The second communication opening 26B is a communication opening 26 distinct from the first communication opening 26A. As shown in Figures 1, 2 to 3, the numerical control device 10 further comprises a fastening / releasing structure 34. The fastening / releasing structure 34 is a structure (structural body) that enables the main body 12 of the numerical control device to support the display device 14 in a fastening and detachable manner. The fastening / releasing structure 34 comprises an adapter 36 that is detachably attached to the rear part 14b (back plate 24). The material of the adapter 36 is, for example, metal, but is not limited to this. For example, at least part of the adapter 36 can be made of plastic. The adapter 36 can be provided with part of the pair of locking devices 20 described above (Fig. 1). More precisely, the pair of locking devices 20 comprises a pair of hooks 38 and a pair of hook retaining sections 40. The pair of hooks 38 can be engaged in the pair of hook retaining sections 40. The adapter 36 can be provided with either the hooks 38 or the hook retaining sections 40. In the present embodiment, a case is described in which the adapter 36 is provided with the pair of hook retaining sections 40. The pair of hook retaining sections 40 is arranged at a distance from each other in the X-direction, but the present invention is not limited thereto. The other element—either the hooks 38 or the hook retaining sections 40—is provided in the housing 16. Therefore, in the present embodiment, both hooks 38 are provided in the housing 16.The specific shape of the locking connection 20 (hook 38 and hook retaining section 40) is not limited to the shape shown in the present embodiment. The adapter 36 also comprises a plurality of projections 42. The plurality of projections 42 extend from the adapter 36 in the Z2 direction. In the present embodiment, the direction from the display device 14 to the main body 12 of the numerical control device coincides with the Z2 direction. Therefore, the projection direction of the multiple projections 42 coincides with the direction from the display device 14 to the main body 12 of the numerical control device. Fig. 4 is a perspective front view of the main body 12 of the numerical control device. As shown in Fig. 4, several holes 44 are already formed in the main body 12 of the numerical control device (housing 16). When the main body 12 of the numerical control device is arranged on the rear part 14b of the display device 14, the several holes 44 accommodate the several projections 42. At least one of the several projections 42 has a hook section 46. When the projection 42 is inserted into the bore 44, the hook section 46 engages a meshing part (not shown) provided on the main body 12 (housing 16) of the numerical control device. The position of the hook section 46 in the projection 42 is, for example, a tip end section of the projection 42 in the Z2 direction, but is not limited to this. Furthermore, similar to the hook 38 of the detent connection 20, the specific shape of the hook section 46 is not limited to the illustration of the present embodiment. At least one of the several projections 42 includes power receiving terminals 48. The power receiving terminals 48 are terminals through which the display device 14 is supplied with electrical energy. The power receiving terminals 48 include, for example, conductor pins arranged on the surface of the projection 42. When the adapter 36 is attached to the rear part 14b of the display device 14, the power receiving terminals 48 are connected to the display circuit 22c of the display device 14 via the first power receiving port 28A or the second power receiving port 28B. The first power receiving port 28A is one of the several power receiving ports 28. The second power receiving port 28B is a power receiving port 28 distinct from the first power receiving port 28A. The selective use of the first power receiving port 28A and the second power receiving port 28B is described later. At least one of the several holes 44 is provided with power supply connections 50. The power supply connections 50 are connections for supplying power to the display device 14 (display circuit 22c) via the power input connections 48. The power supply connections 50 comprise conductor pins arranged on the inner surface of the hole 44. As described above, when the main body 12 of the numerical control device is positioned on the back part 14b of the display device 14, the multiple projections 42 are inserted into the multiple holes 44. When the multiple projections 42 are inserted into the multiple holes 44, the current-intake terminals 48 and the power supply terminals 50 come into contact with each other. The current-intake terminals 48 and the power supply terminals 50 are electrically connected by contact. That is, when the main body 12 of the numerical control device is positioned on the back part 14b of the display device 14, the current-intake terminals 48 and the power supply terminals 50 are electrically connected to each other. Although not explicitly shown, the main body 12 of the numerical control device may have the projections 42, and the display device 14 may have the holes 44. In this case, the power supply terminals 50 may be provided on any of the projections 42. The power pickup terminals 48 may be provided in any of the holes 44. As described above, the adapter 36 is detachably attached to the rear part 14b (back plate 24) of the display device 14. In this context, the back part 14b has several mounting sections 52, which are described below. These mounting sections 52 include a first mounting section 521 (Fig. 3) and a second mounting section 522 (Fig. 5). The first mounting section 521 is a section to which the adapter 36 is attached when the display device 14 is mounted in the first orientation on the main body 12 of the numerically controlled device. The first orientation is a position in which a longitudinal direction DL of the display device 14 runs along the X-direction (Fig. 3). The orientation in which the longitudinal direction DL of the display device 14 runs along the X-direction can, for example, include an orientation of the horizontally arranged display device 14. The adapter 36 is attached to the back section 14b (back plate 24), for example, by means of several screws 54. When the adapter 36 is attached to the back section 14b by means of the several screws 54, the adapter 36 is provided with several through holes 36h. The first attachment section 521 has several threaded holes 56a. The several screws 54, which penetrate the several through holes 36h, can each be screwed into the several threaded holes 56a. The several threaded holes 56a can be arranged such that the adapter 36 can be attached to the back section 14b of the display device 14 in the predetermined position in the first orientation. The predetermined orientation of the adapter 36 is, for example, an orientation of the adapter 36 in a state in which the pair of locking connections 20 is arranged in the X direction. When the adapter 36 is attached to the first mounting section 521, the power receiving terminals 48 are connected to the display circuit 22c (the display circuit substrate 22) of the display device 14 via the first power receiving port 28A. In other words, the position of the first power receiving port 28A can be determined from the position of the power receiving terminals 48 when the adapter 36 is attached to the first mounting section 521. When the adapter 36 is attached to the first mounting section 521, the second wireless transceiver 302 is located within the communication range of the first wireless transceiver 301. When the adapter 36 is attached to the first mounting section 521, it is advantageous that the position of the first wireless transceiver 301 and the position of the second wireless transceiver 302 overlap in a top view along the Z-direction (see also the single-point dashed line CL1 in Fig. 2). Fig. 5 is another perspective exploded view of the display device 14. The second mounting section 522 and the adapter 36 attached to the second mounting section 522 are shown in Fig. 5. Fig. 6 is another perspective exploded view of the numerical control device 10. Fig. 6 shows the numerical control device 10 in the case where the main body 12 of the numerical control device is supported by the adapter 36, which is attached as shown in Fig. 5. The second mounting section 522 is a section to which the adapter 36 is attached when the display device 14 is mounted in the second orientation on the main body 12 of the numerical control device. The second orientation is a position in which a longitudinal direction DL of the display device 14 runs along the Y direction (Fig. 5). The second orientation may include an orientation of the vertically arranged display device 14. The second mounting section 522 can have multiple threaded holes 56b. The multiple screws 54, each penetrating the multiple through holes 36h, can each be screwed into the multiple threaded holes 56b. The multiple threaded holes 56b can be arranged such that the adapter 36 can be attached in the specified orientation to the rear part 14b (back plate 24) of the display device 14 in the second orientation. At least one of the threaded holes 56a described above can also serve as a threaded hole 56b. In the case that the adapter 36 is attached to the second mounting section 522, the power input terminals 48 are connected to the display circuit 22c (the display circuit substrate 22) of the display device 14 via the second power input opening 28B. In other words, the position of the second power input opening 28B can be determined according to the position of the power input terminals 48 when the adapter 36 is attached to the second mounting section 522. When the adapter 36 is attached to the second mounting section 522, the third wireless transceiver 303 is located within the communication range of the first wireless transceiver 301. When the adapter 36 is attached to the second mounting section 522, it is advantageous that the position of the first wireless transceiver 301 and the position of the third wireless transceiver 303 overlap in a top view along the Z-direction (see also the single-point dashed line CL2 in Fig. 6). The adapter 36 may have an access opening 58. If the adapter 36 is attached to the first mounting section 521, the access opening 58 is connected to the first communication opening 26A. Thus, if the adapter 36 is attached to the first mounting section 521, the second wireless transceiver 302 is exposed through the first communication opening 26A and the access opening 58 (see also Fig. 2). If the adapter 36 is attached to the second mounting section 522, the access opening 58 is connected to the second communication opening 26B. Thus, if the adapter 36 is attached to the second mounting section 522, the second wireless transceiver 302 is exposed through the second communication opening 26B and the access opening 58 (see also Fig. 6). With the configuration described above, the numerical control device 10 achieves, for example, the advantageous operating effects described below. The second wireless transceiver 302 is located within the communication range of the first wireless transceiver 301 and can therefore perform wireless communication with it. For example, the first wireless transceiver 301 wirelessly transmits a control signal to control the display device 14. The second wireless transceiver 302 is located within the communication range of the first wireless transceiver 301 to wirelessly receive the control signal. As a result, a control signal is delivered from the main body 12 of the numerical control device to the display device 14. In this way, no connector is required to connect the main body 12 of the numerical control device to the display device 14 in order to send and receive signals between the main body 12 of the numerical control device and the display device 14.The connectorless numerical control device 10 requires no measures against vibrations and shocks acting on the connector. Since the numerical control device 10 contains no connectors, no design to protect the connectors from vibrations and shocks is necessary. Furthermore, according to the present embodiment, the user does not need to exert a relatively large force to connect the connector provided in the display device 14 to the main body 12 of the numerical control device. Likewise, according to the present embodiment, the user does not need to exert a relatively large force to disconnect the connection between the connector provided in the display device 14 and the main body 12 of the numerical control device.As described above, the display device 14 according to the present embodiment can be attached to and removed from the main body 12 of the numerical control device without the application of a relatively large force. The display device 14 includes the power receiving terminals 48. In contrast, the main body 12 of the numerical control device includes the power supply terminals 50. When the display device 14 is attached to the main body 12 of the numerical control device, the power receiving terminals 48 and the power supply terminals 50 come into contact with each other. Accordingly, electrical energy can be supplied from the main body 12 of the numerical control device to the display device 14 without the need for connectors. Furthermore, it is not necessary to perform the process of connecting the display device 14 to the power source separately from the process of attaching the display device 14 to the main body 12 of the numerical control device. According to the present embodiment, when the display device 14 is attached to the main body 12 of the numerical control device, the projections 42 of the display device 14 are inserted into the holes 44 of the main body 12 of the numerical control device. Thus, the display device 14 is held by the main body 12 of the numerical control device via the projections 42. The power supply terminals 50 are provided in the bore 44. Accordingly, when the projection 42 is inserted into the bore 44, the power pickup terminals 48 and the power supply terminals 50 can be brought into contact with each other. Each of the projections 42 has a hook section 46. The hook section 46 engages in a engagement part (not shown) provided on the main body 12 of the numerical control device when the projection 42 is inserted into the bore 44. Accordingly, the display device 14 and the main body 12 of the numerical control device can be more securely connected via the projections 42. This more secure connection between the display device 14 and the main body 12 of the numerical control device allows for more reliable contact between the current-collecting terminals 48 and the power supply terminals 50. The projections 42 can be provided on the main body 12 of the numerical control device, but are preferably provided on the display device 14. This is because the main body 12 of the numerical control device can also be used without the display device 14. That is, if the display device 14 is not attached to the main body 12 of the numerical control device, the projections 42 provided on the main body 12 of the numerical control device 14 can act as obstacles when the main body 12 of the numerical control device is used. In this case, an attractive appearance cannot be achieved either. Therefore, the projections 42 are preferably provided on the display device 14. The display device 14 includes the adapter 36. The adapter 36 can be attached to and detached from the rear part 14b (back plate 24) of the display device 14. The display device 14 is attached to the main body 12 of the numerical control device via the adapter 36. Accordingly, the main body 12 of the numerical control device can be concealed behind the display device 14 from the front. Therefore, it is possible to give the user, who is viewing the screen provided on the display device 14, the impression that the numerical control device 10 has a simple appearance. The rear part 14b of the display device 14 has the first mounting section 521 and the second mounting section 522. When the display device 14 is mounted in the first orientation on the main body 12 of the numerical control device, the adapter 36 is attached to the first mounting section 521. When the display device 14 is mounted in the second orientation on the main body 12 of the numerical control device, the adapter 36 is attached to the second mounting section 522. In this way, the orientation of the display device 14 can be changed without changing the orientation of the main body 12 of the numerical control device. When the adapter 36 is attached to the first mounting section 521, the second wireless transceiver 302 is within the communication range of the first wireless transceiver 301. Accordingly, the second wireless transceiver 302 can receive the control signal when the adapter 36 is attached to the first mounting section 521. In the present embodiment, the second wireless transceiver 302 is located outside the communication range of the first wireless transceiver 301 when the adapter 36 is attached to the second mounting section 522. However, when the adapter 36 is located on the second mounting section 522, the third wireless transceiver 303 is located within the communication range of the first wireless transceiver 301. Therefore, the third wireless transceiver 303 can receive the control signal when the adapter 36 is attached to the second mounting section 522. Furthermore, when the adapter 36 is attached to the first mounting section 521, it is advantageous that the positions of the first wireless transceiver 301 and the second wireless transceiver 302 overlap in a top view along the Z-direction. Accordingly, when the adapter 36 is attached to the first mounting section 521, the positions of the first wireless transceiver 301 and the second wireless transceiver 302 are closest to each other in a top view. By bringing the positions of the first wireless transceiver 301 and the second wireless transceiver 302 as close together as possible, the signal strength of the radio communication between the first wireless transceiver 301 and the second wireless transceiver 302 can be advantageously ensured.The Z-direction coincides with the forward-backward direction of the numerical control device 10 (display device 14). Furthermore, according to the present embodiment, when the adapter 36 is attached to the first mounting section 521, the second wireless transceiver 302 is exposed via the first communication opening 26A and the exposure opening 58. Accordingly, the backplate 24 and the adapter 36 do not impede wireless communication between the first wireless transceiver 301 and the second wireless transceiver 302 when the adapter 36 is attached to the first mounting section 521. That is to say, the backplate 24 and the adapter 36 can be made of metal, which could potentially impede wireless communication. However, since, according to the present embodiment, the second wireless transceiver 302 is exposed, wireless communication between the first wireless transceiver 301 and the second wireless transceiver 302 is not impeded by the backplate 24 and the adapter 36. According to the present embodiment, the first wireless transceiver 301 is housed in the enclosure 16. As described above, the enclosure 16 of the main body 12 of the numerically controlled device is made of plastic. Plastic impedes wireless communication less than metal. Therefore, it is less likely that the wireless communication between the first wireless transceiver 301 and the second wireless transceiver 302 will be impeded by the enclosure 16. In the event that the adapter 36 is attached to the second mounting section 522, it is advantageous that the positions of the first wireless transceiver 301 and the third wireless transceiver 303 overlap in a top view along the Z-direction. Accordingly, in the event that the adapter 36 is attached to the second mounting section 522, the positions of the first wireless transceiver 301 and the third wireless transceiver 303 are closest to each other in a top view. This advantageously ensures the communication strength of the radio communication between the first wireless transceiver 301 and the third wireless transceiver 303. Furthermore, when the adapter 36 is attached to the second mounting section 522, the third wireless transceiver 303 is unobstructed through the second communication opening 26B and the access opening 58. Therefore, the backplate 24 and the adapter 36 do not impede wireless communication between the first wireless transceiver 301 and the third wireless transceiver 303 when the adapter 36 is attached to the second mounting section 522. Likewise, the housing 16 does not impede wireless communication between the first wireless transceiver 301 and the third wireless transceiver 303. The reason for this is the same as the reason why wireless communication between the first wireless transceiver 301 and the third wireless transceiver 303 is not impeded by the backplate 24, the adapter 36, the housing 16, and the like. The embodiment can be modified as follows. In the following exemplary modifications, descriptions that overlap with or repeat those of the embodiment are omitted. In the drawings used in the following exemplary modifications, the same reference numerals are used for the same configurations as in the embodiment. (Example modification 1) Fig. 7 is a perspective view illustrating a display device 14 (display device 141) according to exemplary modification 1. Fig. 7 shows a partially enlarged view of the rear part 14b of the display device 141. The display device 141 may further comprise a cover element 60. The cover element 60 is made of plastic. The material of the cover element 60 includes, for example, polyethylene terephthalate (PET), but is not limited to it. The cover element 60 is a film element, such as a PET film, but is not limited to it. The cover element 60 can be provided to cover at least either the second wireless transceiver 302 or the third wireless transceiver 303. Therefore, the cover element 60 can, for example, be provided at at least one of the first communication openings 26A or the second communication opening 26B. However, as shown in Fig. 7, the cover element 60 is preferably provided in the exposure opening 58. In this case, it is not necessary to provide separate cover elements 60 at the first communication opening 26A and the second communication opening 26B. That is, when the adapter 36 is attached to the first mounting section 521, the second wireless transceiver 302 is covered by the cover element 60 provided in the exposure opening 58. When the adapter 36 is attached to the second mounting section 522, the third wireless transceiver 303 is covered by the cover element 60 provided in the exposure opening 58. Plastic impedes wireless communication less than metal. Therefore, the cover element 60, which covers the second wireless transceiver 302, does not impede radio communication between the first wireless transceiver 301 and the second wireless transceiver 302. Likewise, the cover element 60, which covers the third wireless transceiver 303, does not impede radio communication between the first wireless transceiver 301 and the third wireless transceiver 303. The cover element 60 can protect the second wireless transceiver 302 and the third wireless transceiver 303 from foreign objects without affecting wireless communication. These foreign objects include, but are not limited to, splashes of cutting fluid. (Exemplary modification 2) Fig. 8 is a perspective view of a main body 12 of a numerical control device (main body 122 of the numerical control device) according to exemplary modification 2. Fig. 9 is a top view including the first wireless transceiver 301 shown in Fig. 8. The other control substrates 182, apart from the back wall 181, are not shown in Figs. 8 and 9. The main body 122 of the numerical control device includes a noise shielding element 62 (a first noise shielding element 621). The first noise shielding element 621 comprises, for example, a sheet metal plate. The first noise shielding element 621 is arranged to cover the first wireless transceiver 301. The first interference shielding element 621 suppresses the reception of interference signals by the first wireless transceiver 301. The first interference shielding element 621 also prevents electromagnetic waves emitted by the wireless transceiver 301 from reaching the vicinity of the first wireless transceiver 301. Fig. 10 is a perspective view illustrating part of a display device 14 (display device 142) according to exemplary modification 2. Fig. 10 shows a partially enlarged view of the rear part 14b of the display device 142. The display device 142 comprises a second interference shielding element 622. The second interference shielding element 622 is separate from the first interference shielding element 621. The second interference shielding element 622 is provided, for example, in the adapter 36. The second interference shielding element 622 comprises, for example, a conductive seal. The second interference shielding element 622 is arranged such that it surrounds the exposure aperture 58 in a top view along the Z-direction. In the case where the adapter 36 is attached to the first mounting section 521, the second interference shielding element 622 surrounds the second wireless transceiver 302 in a top view along the Z-direction of the display device 142. In this case, the second interference shielding element 622 suppresses the reception of interference signals by the second wireless transceiver 302. When the adapter 36 is attached to the first mounting section 521, the second interference shielding element 622 prevents electromagnetic waves emitted by the second wireless transceiver 302 from entering the vicinity of the second wireless transceiver 302. Although not shown, when the adapter 36 is attached to the second mounting section 522, the second interference shielding element 622 surrounds the third wireless transceiver 303 in a top view along the Z-direction of the display device 142. In this case, the second interference shielding element 622 suppresses the reception of interference signals by the third wireless transceiver 303. When the adapter 36 is attached to the second mounting section 522, the second interference shielding element 622 prevents electromagnetic waves emitted by the third wireless transceiver 303 from entering the vicinity of the third wireless transceiver 303. (Exemplary modification 3) Fig. 11 shows a perspective view from the rear of a display device 14 (display device 143) according to exemplary modification 3. The back section 14b (back plate 24) of the display device 14 and the fastening / releasing device 34 can be integrated. For example, as shown in Fig. 11, the back plate 24, which is integrated with the fastening / releasing device 34, is provided on the back section 14b of the display device 143. In this case, the third wireless transceiver 303 can be omitted. The second wireless transceiver 302 protrudes from the communication opening 26 formed in the back section 14b. (Exemplary modification 4) Even if the display device 14 has several mounting sections 52, the number of wireless transceivers 30 provided in the display device 14 can be one. For example, the second wireless transceiver 302 can still be within the communication range of the first wireless transceiver 301 even if the adapter 36 is attached to the second mounting section 522. In this case, the third wireless transceiver 303 can be omitted. (Exemplary modification 5) The arrangement of the power input terminals 48 and the arrangement of the power supply terminals 50 can be modified accordingly. For example, the power input terminals 48 can be located anywhere except on the projection 42 of the display device 14. The power supply terminals 50 can be located anywhere except on the opening 44 in the main body 12 of the numerical control device. Even in such a case, the power input terminals 48 and the power supply terminals 50 are arranged so that they come into contact with each other when the display device 14 is attached to the main body 12 of the numerical control device. (Exemplary modification 6) The display device 14 can be connected to a power source (the main body 12 of the numerical control device) via a power supply cable (not shown). In this case, the display device 14 can be supplied with electrical energy via the power supply cable. (Exemplary embodiment 7) The display device 14 may include a battery (not shown). In this case, the display device 14 can be operated using the electrical energy stored in the battery. The battery may include, for example, a secondary battery, but is not limited to this. (Exemplary modification 8) The display device 14 can include a power supply unit (not shown). In this case, the display device 14 can be operated with electrical energy supplied via the power supply unit. Accordingly, the display device 14 can be operated without receiving a power supply from the main body 12 of the numerical control device. (Exemplary modification 9) If the rear part 14b (backplate 24) of the display device 14 is made of a material that is less likely to interfere with wireless communication, the communication opening 26 can be omitted. For example, if the rear part 14b is made of plastic, the communication opening 26 can be omitted. Similarly, the exposure opening 58 can be omitted if the adapter 36 is made of a material that interferes less with wireless communication. For example, if the adapter 36 is made of plastic, the exposure opening 58 can be omitted. If, on the other hand, the housing 16 of the main body 12 of the numerical control device is made of a material that tends to impede wireless communication, it is advantageous to have an opening in the housing 16 for exposing the first wireless transceiver 301. For example, if the housing 16 is made of metal, an opening for exposing the first wireless transceiver 301 is preferably formed in the housing 16. (Exemplary modification 10) The display device 14 can comprise three or more mounting sections 52. For example, the display device 14 comprises the first mounting section 521 and the second mounting section 522 (see also the embodiment). The display device 14 may further comprise a mounting section 52 that tilts the main body 12 of the numerical control device relative to the longitudinal direction DL of the display device 14 (see also Fig. 3). The mounting section 52 may be provided on the rear part 14b of the display device 14, similar to the first mounting section 521, the second mounting section 522, and the like. The first mounting section 521 is the mounting section 52 to which the adapter 36 can be attached when the display device 14 is mounted in the first orientation on the main body 12 of the numerically controlled device (see also the embodiment). The display device 14 may further comprise a second mounting section 52 to which the adapter 36 can be attached when the display device 14 is mounted in the first orientation on the main body 12 of the numerically controlled device. The relative positions of the second mounting section 52 and the first mounting section 521 on the back part 14b differ from each other in at least one of the directions X or Y.Accordingly, the user can attach the main body 12 of the numerical control device in the first orientation at a position that is, for example, offset in the X1 direction, X2 direction, Y1 direction or Y2 direction from the case in which the main body 12 (adapter 36) of the numerical control device is attached to the first mounting section 521 in the first orientation. Furthermore, the second mounting section 522 is the mounting section 52 to which the adapter 36 can be attached when the display device 14 is mounted in the second orientation on the main body 12 of the numerical control device (see also the embodiment). The display device 14 may also include a further mounting section 52 to which the adapter 36 can be attached when the display device 14 is mounted in the second orientation on the main body 12 of the numerical control device. The relative positions of the other mounting section 52 and the second mounting section 522 on the back part 14b differ from each other in at least one of the directions X or Y.Accordingly, the user can attach the main body 12 of the numerical control device in the second orientation at a position that is shifted, for example, in the X1 direction, X2 direction, Y1 direction or Y2 direction relative to the case in which the main body 12 (adapter 36) of the numerical control device is attached in the second orientation to the second mounting section 522. According to the present exemplary embodiment, ease of use for the operator can be achieved. Each of the multiple mounting sections 52 has multiple threaded holes (56a, 56b). The threaded hole of one of the multiple mounting sections 52 and the threaded hole of another of the multiple mounting sections 52 can overlap. The number, arrangement, and other characteristics of the communication openings 26 provided in the display device 14 (see also the embodiment) can be appropriately determined according to the number, arrangement, and other characteristics of the mounting sections 52 contained in the display device 14. Likewise, the number, arrangement, and other characteristics of the wireless transceivers 30 contained in the display device 14 can be appropriately determined according to the number, arrangement, and other characteristics of the mounting sections 52 contained in the display device 14. According to the embodiment and the exemplary modifications, the reliability of the numerical control device 10 is good. With regard to the foregoing embodiment, the following additional remarks are further disclosed. (Supplementary Note 1) The numerical control device (10) according to the present disclosure is provided with the main body (12) of the numerical control device and the display device (14) attached to the main body of the numerical control device and comprises the plurality of wireless transceivers (30), including the first wireless transceiver (301) provided in the main body of the numerical control device and the second wireless transceiver (302) provided in the display device, wherein the second wireless transceiver is configured to communicate with the first wireless transceiver by being within the communication range of the first wireless transceiver. (Supplementary Note 2) In the numerical control device according to Supplementary Note 1, the display device may include a current receiving terminal (48) designed to receive an electrical power supply, the main body of the numerical control device may include a power supply terminal (50) designed to supply the electrical power supply to the display device, and the current receiving terminal and the power supply terminal may be in contact with each other when the display device is attached to the main body of the numerical control device. (Supplementary Note 3) In the numerical control device according to Supplementary Note 2, the display device may include a projection (42) that extends towards the main body of the numerical control device; the opening (44) into which the projection can be inserted may be formed in the main body of the numerical control device; the current receiving connection may be provided on the projection; and the power supply connection may be provided in the opening. (Supplementary Note 4) In the numerical control device according to Supplementary Note 3, the projection may include a hook section (46) which is designed to engage with the main body of the numerical control device when the projection is inserted into the opening. (Supplementary Note 5) In the numerical control device according to one of Supplementary Notes 1 to 4, the display device may comprise the adapter (36) which is designed to support the main body of the numerical control device and which can be attached to and removed from the rear part (14b) of the display device, and the display device may be attached to the main body of the numerical control device via the adapter. (Supplementary Note 6) In the numerical control device according to Supplementary Note 5, the rear part may comprise the first mounting section (521) to which the adapter is attached when the display device is mounted in the first orientation on the main body of the numerical control device, and the second mounting section (522) to which the adapter is attached when the display device is mounted in the second orientation on the main body of the numerical control device. (Supplementary Note 7) In the numerical control device according to Supplementary Note 6, the plurality of wireless transceivers may further comprise the third wireless transceiver (303) which is provided in the display device separately from the second wireless transceiver, in the case that the display device is attached to the main body of the numerical control device in the state in which the adapter has been attached to the first mounting section, the second wireless transceiver may be within the communication range, and in the case that the display device is attached to the main body of the numerical control device in the state in which the adapter has been attached to the second mounting section, the third wireless transceiver may be within the communication range. (Supplementary Note 8) In the case of the numerical control device according to Supplementary Note 7, when the display device is attached to the main body of the numerical control device in the state in which the adapter has been attached to the first mounting section, the position of the first wireless transceiver and the position of the second wireless transceiver may overlap in the top view along the front-back direction of the display device, and in the case in which the display device is attached to the main body of the numerical control device in the state in which the adapter has been attached to the second mounting section, the position of the first wireless transceiver and the position of the third wireless transceiver may overlap in the top view. (Supplementary Note 9) In the numerical control device according to one of the Supplementary Notes 1 to 5, the position of the first wireless transceiver and the position of the second wireless transceiver may overlap in the top view along the front-back direction of the display device. Although the present disclosure has been described in detail, it is not limited to the embodiments described above. Within a scope that does not deviate from the essence and core of the present disclosure, or within a scope that does not deviate from the purpose of the present disclosure derived from the content described in the claims and their equivalents, various additions, substitutions, modifications, partial deletions, or the like may be made to such embodiments. These embodiments may also be implemented in combination. For example, the sequence of operations and the sequence of processes are presented as examples in the embodiments described above, and the present invention is not limited to such operations and processes.The same applies if numerical values ​​or mathematical expressions (equations) are used in the description of the embodiments described above. REFERENCE MARK LIST 10 Numerical control device 12 Main body of the numerical control device 14 Display device 14b Rear 30 Wireless transceiver 36 Adapter 42 Protrusion 44 Hole 46 Hook section 48 Power receiving connector 50 Power supply connector 301 First wireless transceiver 302 Second wireless transceiver 303 Third wireless transceiver 521 First mounting section 522 Second mounting section QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature JP 2019-082908 A [0002, 0006]

Claims

Numerical control device comprising a main body of the numerical control device and a display device attached to the main body of the numerical control device, wherein the numerical control device comprises: a plurality of wireless transceivers, including a first wireless transceiver provided in the main body of the numerical control device and a second wireless transceiver provided in the display device, wherein the second wireless transceiver is configured to communicate with the first wireless transceiver by being within a communication range of the first wireless transceiver. Numerical control device according to claim 1, wherein the display device comprises a power input port configured to receive electrical energy, the main body of the numerical control device comprises a power supply port configured to supply electrical energy to the display device, and the power input port and the power supply port are in contact with each other when the display device is attached to the main body of the numerical control device. Numerical control device according to claim 2, wherein the display device has a projection that extends towards the main body of the numerical control device, an opening is formed in the main body of the numerical control device into which the projection can be inserted, the current input connection is provided on the projection and the power supply connection is provided in the opening. Numerical control device according to claim 3, wherein the projection has a hook section configured to engage with the main body of the numerical control device when the projection is inserted into the opening. Numerical control device according to one of claims 1 to 4, wherein the display device comprises an adapter configured to support the main body of the numerical control device, and which is attachable to and detachable from a rear part of the display device, and the display device is attached to the main body of the numerical control device via the adapter. Numerical control device according to claim 5, wherein the rear part comprises: a first fastening section to which the adapter is attached when the display device is mounted in a first orientation on the main body of the numerical control device; and a second fastening section to which the adapter is attached when the display device is mounted in a second orientation on the main body of the numerical control device. Numerical control device according to claim 6, wherein the multiple wireless transceivers further comprise a third wireless transceiver provided in the display device separately from the second wireless transceiver, wherein in a case where the display device is attached to the main body of the numerical control device in a state where the adapter has been attached to the first mounting section, the second wireless transceiver is located within the communication range, and in a case where the display device is attached to the main body of the numerical control device in a state where the adapter has been attached to the second mounting section, the third wireless transceiver is located within the communication range. Numerical control device according to claim 7, wherein in the case where the display device is attached to the main body of the numerical control device in the state in which the adapter has been attached to the first mounting section, a position of the first wireless transceiver and a position of the second wireless transceiver overlap in a top view along a front-back direction of the display device, and in the case where the display device is attached to the main body of the numerical control device in the state in which the adapter has been attached to the second mounting section, the position of the first wireless transceiver and the position of the third wireless transceiver overlap in a top view. Numerical control device according to one of claims 1 to 5, wherein the position of the first wireless transceiver and the position of the second wireless transceiver overlap in a top view along a front-back direction of the display device.

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