JP2010239375A - Speaker device and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve acoustic characteristics of a loud speaker by producing a desired tensile force for a diaphragm. <P>SOLUTION: In a speaker device 1 provided with a planar diaphragm 2 for displaying an image projected from outside, a frame 3 for holding the diaphragm 2 with a surface opposite to the surface on which the image is displayed, and a driving body for driving a screen 2 in the direction to be in contact with and separated from the a frame 3, the diaphragm 2 is provided in a tensioned state to the frame 3 to ensure that a tensional force acts to outward of circumferential direction to the diaphragm 2 such that the diaphragm 2 stays in a flat surface even if the diaphragm 2 expands or contracts. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a speaker device and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, there is a speaker device that emits sound from the front of a diaphragm by arranging a voice coil at the center of a diaphragm held by a casing and transmitting a signal to the voice coil. As such a type of speaker device, one disclosed in Patent Document 1 is known.

  In the speaker device disclosed in Patent Document 1, tension is applied in the longitudinal direction of the diaphragm by inserting a fret into the inner edge of the short side of the support frame that supports the diaphragm.

JP 2001-275187 A (FIG. 1)

  However, in the speaker device disclosed in Patent Document 1, the magnitude of the tension applied to the diaphragm changes due to the influence of temperature and humidity, and the acoustic characteristics of the diaphragm change accordingly. Has a problem that sufficient sound volume cannot be obtained and sound distortion occurs.

  In particular, when the voice coil is driven, the vicinity of the voice coil installation position on the diaphragm is thermally expanded due to the heat generated by the voice coil, and locally deformed into a convex shape or a concave shape. Such deformation leads to deterioration of the acoustic characteristics of the diaphragm.

  In the speaker device disclosed in Patent Document 1, an attempt is made to prevent deterioration of acoustic characteristics due to thermal expansion as described above by inserting a fret and applying tension in the longitudinal direction. However, such a method may not provide sufficient tension to maintain good acoustic characteristics.

  A method of attaching a frame for generating tension to the diaphragm on the outside of the casing that holds the diaphragm is also conceivable. However, with such a method, good acoustic characteristics can be obtained after the frame is attached, but an appropriate tension cannot be obtained before the frame is attached. For this reason, it is necessary to confirm the performance of the speaker device before attaching the frame, and workability is reduced.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a speaker device capable of improving acoustic characteristics by applying a desired tension to the diaphragm, and a method for manufacturing the speaker device. Is to provide.

  In order to solve the above-described problems, the present invention provides a planar diaphragm, a frame that holds the diaphragm on the surface of the diaphragm opposite to the plane exposed to the outside, and a screen that is in contact with and separated from the frame. In order to maintain the diaphragm on a flat surface, the speaker device having a driving body for driving in the direction to perform vibrations so that tension acts on the diaphragm outward in the circumferential direction. A plate is stretched around the frame.

  The tension acting on the diaphragm is preferably generated by thermally expanding or contracting one or both of the diaphragm and the frame.

  Further, in order to apply a tension to the diaphragm, it is preferable to use the restoring force of the frame when the frame is warped like a bow and the frame returns from the warped state to the original state.

  In addition, a pressure component is arranged inside the frame so as to be spanned between the frames, and both ends of the pressure component press the inner peripheral edge of the frame toward the outer side in the circumferential direction. Preferably acts on the diaphragm.

  Further, it is preferable that the pressure member is a beam-like member having a larger dimension within a range of 0.5% or less than the interval between the frames to be bridged.

  In addition to the beam-shaped member, the pressure member has a screw member that is interposed between the end of the beam-shaped member and the frame and presses the frame outward in the circumferential direction. preferable.

  In addition to the beam-shaped member, the pressure member has an elastic member that is interposed between the end of the beam-shaped member and the frame and presses the frame outward in the circumferential direction. preferable.

  Further, it is preferable that the beam-like member is bridged between the frames in a bow shape.

  Also, the beam members are bridged in a pair in a state of bowing in opposite directions between the frames, and a connection for correcting the warpage of both beam members between the beam members. It is preferable to provide a member.

  According to another aspect of the present invention, there is provided a method of manufacturing a speaker device in which a planar diaphragm held by a frame is vibrated to emit sound, and the first adhesive is applied to one surface of the diaphragm and the vibration of the frame is applied. A step of applying the second adhesive on one surface which is a surface facing the plate, and a diaphragm in which the first adhesive is applied on a mounting plate having a flat form heated by a heating means Is placed for a predetermined time with the vibration plate placed on the placement plate, and the vibration plate is heated. Placing the frame coated with the second adhesive on the diaphragm such that one surface thereof faces one surface of the diaphragm, and placing the frame on the diaphragm. The placed frame is pressed from above with a pressing plate having a flat plate shape to vibrate A step of bonding the frame and, after left for a predetermined time in a state in which bond the diaphragm and the frame, and has a step of releasing the pressure, the.

  Further, in a method of manufacturing a speaker device that emits sound by vibrating a planar diaphragm held by a frame, a surface that is coated with a first adhesive on one surface of the diaphragm and that faces the diaphragm of the frame A step of applying the second adhesive to one surface, and a mounting plate whose mounting surface is formed in a convex shape that swells upward in a curved shape or a concave shape that indents downward in a curved shape A step of placing the diaphragm coated with the first adhesive so that the surface opposite to the one surface faces the mounting plate; and a frame coated with the second adhesive. The step of aligning and placing the diaphragm on the diaphragm so that one surface thereof faces the one surface of the diaphragm and the frame placed on the diaphragm are projected from above the pressing surface. Shaped into a concave shape corresponding to the shape or a convex shape corresponding to the concave shape, respectively Is pressed by the pressing plate to be, a step of bonding the diaphragm and the frame, after leaving a predetermined time in a state of being crimped and a vibration plate and the frame preferably has a step of releasing the pressure, the.

  ADVANTAGE OF THE INVENTION According to this invention, the speaker apparatus which can aim at the improvement of an acoustic characteristic by giving desired tension | tensile_strength to a diaphragm, and its manufacturing method can be provided.

1 is an exploded perspective view of a speaker device according to a first embodiment of the present invention. 1 is a perspective view of a speaker device according to a first embodiment of the present invention. It is a side view of the pressurization apparatus used in order to manufacture the speaker apparatus in FIG. It is a flowchart which shows the manufacturing method of the speaker apparatus which concerns on the 1st Embodiment of this invention. It is a side view for demonstrating the process in which a screen and a frame are arrange | positioned between the mounting board and press board of a pressurization apparatus in FIG. It is a side view which shows the state which pressurized the screen and the flame | frame with the pressurization apparatus in FIG. It is a flowchart which shows the manufacturing method of the speaker apparatus which concerns on the 2nd Embodiment of this invention. It is a side view for demonstrating the process which arrange | positions a screen and a frame between the convex plate of a pressurization apparatus used in order to manufacture the speaker apparatus based on the 2nd Embodiment of this invention, and a concave plate. is there. It is a figure which shows the state which pressurized the screen and the flame | frame with the pressurization apparatus in FIG. It is a side view of a screen and a frame immediately after taking out from a pressurizing apparatus. It is a rear view of the speaker apparatus which concerns on the 3rd Embodiment of this invention. It is sectional drawing which cut | disconnected the speaker apparatus based on the 3rd Embodiment of this invention by CC line. It is sectional drawing of the short part vicinity of the short beam-shaped member in the speaker apparatus which concerns on the 4th Embodiment of this invention. It is sectional drawing which cut | disconnected the edge part vicinity of the short beam-shaped member in FIG. 13 by the DD line. It is sectional drawing of the short part vicinity of the short beam-shaped member in the speaker apparatus which concerns on the 5th Embodiment of this invention. It is sectional drawing which cut | disconnected the edge part vicinity of the short beam-shaped member in FIG. 15 by the EE line | wire. It is a rear view of the speaker apparatus which concerns on the 6th Embodiment of this invention. It is sectional drawing which cut | disconnected the speaker apparatus based on the 6th Embodiment of this invention by the FF line | wire in FIG.

(First embodiment)
Hereinafter, a speaker device according to a first embodiment of the present invention will be described with reference to the drawings. In the following description (common to each embodiment), FIG. 1, display the arrow _{X 1} direction shown in FIGS. 2 and 11 to 18, arrow _{X 2} direction back, the arrow _{Y 1} direction left, arrow Y ₂ direction to the right, respectively define a lower and upper and arrow Z ₂ direction arrow Z ₁ direction. Further, the upper side of FIGS. 3, 5, 6 and 7 to 9 is defined as “upper” and the lower side is defined as “lower”.

  FIG. 1 is an exploded perspective view of the speaker device 1. FIG. 2 is a perspective view of the speaker device 1.

  The speaker device 1 is a direct drive speaker device. As shown in FIG. 1, the speaker device 1 is a screen 2 serving as a diaphragm that forms a surface for projecting an external image, a frame 3 that holds the screen 2, and a screen 2. Is composed mainly of a magnetic circuit 4 that constitutes a part of a driving body that oscillates and a support member 5 that supports the magnetic circuit 4 on the frame 3. As an example of dimensions of the speaker device 1, for example, the dimension in the longitudinal direction can be about 1000 mm, the dimension in the lateral direction can be 600 mm, and the thickness dimension can be 35 mm.

  As shown in FIG. 1, the frame 3 has a rectangular frame shape. The length dimension that is the dimension in the longitudinal direction of the frame 3 and the width dimension that is the dimension in the short direction are substantially the same as the length dimension and the width dimension of the speaker device 1. An aluminum alloy is used as the material of the frame 3. However, the material of the frame 3 is not limited to the aluminum alloy.

  The frame 3 is composed of two long side frames 6 and 6 constituting the longitudinal direction and two short side frames 7 and 7 constituting the short direction. The cross-sectional shapes of the long side frame 6 and the short side frame 7 have, for example, a substantially U shape (substantially concave shape) having corners. As described above, since the frame 3 has a rectangular frame shape, the frame 3 has an opening region 8 having a rectangular shape and opening in the front and back direction.

  In addition, a magnetic circuit 4 is disposed substantially at the center of the opening region 8. The magnetic circuit 4 includes a holder (not shown) and a magnet (not shown). The magnetic circuit 4 is held on the frame 3 by a support member 5. The support member 5 is disposed so as to divide the opening region 8 into two vertically. The support member 5 has a prismatic shape that is wide in the vertical direction (that is, a columnar shape close to a thin plate). Further, the end surfaces of both ends of the support member 5 are joined to the two long side frames 6 and 6 which face each other. In the present embodiment, an aluminum alloy is adopted as the material of the support member 5. However, the material of the support member 5 is not limited to the aluminum alloy.

  Further, as shown in FIGS. 1 and 2, the screen 2 is attached to the front side of the frame 3 so that the outer peripheral surface thereof coincides with the outer peripheral surface of the frame 3. The screen 2 is fixed to the frame 3 with an adhesive interposed. In a state where the screen 2 is fixed to the frame 3, the screen 2 has a plane horizontal to the YZ plane. When the screen 2 is fixed to the frame 3, the screen 2 is pulled outward by the frame 3 in the circumferential direction represented by the arrow P direction in FIG. 2. That is, a tension that pulls the screen 2 outward in the circumferential direction acts between the screen 2 and the frame 3. As a result, the frame 3 is pulled inward by the reaction force against the tension of the screen 2. However, since the frame 3 has sufficient rigidity to withstand the reaction force, the frame 3 is affected by the influence of the tension of the screen 2. No harmful bending will occur.

  Moreover, as an example of the material of the screen 2, there is one that employs an aluminum alloy. However, the material of the screen 2 is not limited to the aluminum alloy, and can be appropriately selected in consideration of various vibration characteristics and reflection characteristics. A voice coil (not shown) that constitutes a part of the driving body is disposed at a position corresponding to the magnetic circuit 4 on the back surface of the screen 2. The voice coil (not shown) is formed by winding a coil wire around a coil bobbin having a predetermined size. This voice coil (not shown) cooperates with the magnetic circuit 4 to vibrate the screen 2. Further, a piezoelectric element or the like may be employed as the driving body instead of the magnetic circuit 4 and the voice coil (not shown).

  Next, a method for manufacturing the speaker device 1 will be described.

  FIG. 3 is a side view of the pressure device 10 used to manufacture the speaker device 1 in FIG. FIG. 4 is a flowchart showing a method for manufacturing the speaker device 1 according to the first embodiment of the present invention. FIG. 5 is a side view for explaining a process of arranging the screen 2 and the frame 3 between the mounting plate 14 and the pressing plate 15 of the pressing device 10 in FIG. FIG. 6 is a side view showing a state in which the screen 2 and the frame 3 are pressed by the pressing device 10 in FIG.

  The speaker device 1 is manufactured using a pressurizing device 10 shown in FIG. The pressure device 10 is used for thermocompression bonding of the screen 2 and the frame 3. As shown in FIG. 3, the pressurizing apparatus 10 includes a surface plate 11, a heat shield plate 12 disposed above the surface plate 11, a heater 13 disposed above the heat shield plate 12, and the heater 13. A flat plate-shaped mounting plate 14 disposed above, a flat plate-shaped pressing plate 15 that is mounted on the mounting plate 14 and presses an object, and a gripping portion 16 that grips the pressing plate 15. And having.

  The surface plate 11 has a flat plate shape with a slightly large thickness, and serves as a base when the pressurizing device 10 is installed at an installation location. The heat shield plate 12 is formed of a heat insulating material and plays a role of preventing heat generated from the heater 13 from being transmitted to the surface plate 11. The heater 13 has a substantially flat plate shape, and an electric heater or an infrared heater can be suitably used as the heater 13. Moreover, it is preferable to employ | adopt the heater 13 which can set heating temperature. The mounting plate 14 disposed above the heater 13 can be made of aluminum, for example, and has a thickness dimension of about 10 mm. Moreover, the mounting surface 14a of the mounting plate 14 is formed in a flat surface. The pressing plate 15 is disposed so as to face the mounting plate 14, and the thickness dimension thereof can be formed to be about 10 mm, for example, similarly to the mounting plate 14. The pressing surface 15a of the pressing plate 15 is formed as a flat surface. The gripping portion 16 is fixed above the pressing plate 15, and has a gripping plate 16a having a plate shape that protrudes upward in a substantially umbrella shape, and protrudes upward from a substantially center of the gripping plate 16a. And a handle 16b provided.

  When manufacturing the speaker device 1, first, the first adhesive is applied to the back side surface 2 a (see FIG. 5) of the screen 2, and the second adhesive is applied to the front side surface 3 a (see FIG. 5) of the frame 3. Apply (application process: S101). A 1st adhesive agent and a 2nd adhesive agent are apply | coated to the site | part which mutually contacts in the back side surface 2a and the front side surface 3a. The first adhesive and the second adhesive constitute an acrylic two-component adhesive that hardens after several minutes when they are mixed with each other. Next, as shown in FIG. 5, the screen 2 coated with the first adhesive is placed on the placement surface 14a of the placement plate 14 so that the back side surface 2a faces upward (first placement). Placing step: S102).

  Next, the heater 13 is heated to raise the heater 13 to a temperature of about 50 ° C. As described above, when the screen 2 is placed on the placing plate 14 and the heater 13 is left heated for several minutes while being heated, the heat of the heater 13 is transmitted to the screen 2. As a result, the temperature of the screen 2 also rises to about 50 ° C. (heating step: S103). Here, for example, when the room temperature is 25 ° C., if the temperature of the screen 2 is increased to about 50 ° C., the temperature of the screen 2 is increased by 25 ° C. The size of the screen 2 in the longitudinal direction is about 1000 mm, which is the same as the size of the speaker device 1 in the longitudinal direction. Further, as described above, when the temperature of the screen 2 is changed from 25 ° C. to 50 ° C., the dimension in the longitudinal direction of the screen 2 is extended by 0.5 mm due to the change of the linear expansion coefficient. The room temperature and the heating temperature are not limited to 25 ° C. and 50 ° C., respectively, and may be set to other temperatures.

  Next, the frame 3 coated with the second adhesive is positioned and placed above the screen 2 placed on the placement plate 14 so that the adhesive surfaces of the frames 3 overlap each other (second Placement step: S104). Immediately thereafter, the gripping portion 16 is gripped by the device or the like, and the pressing plate 15 is moved downward. In this manner, the frame 3 placed on the screen 2 is pressed by the pressing plate 15 from above. (Press-bonding step: S105). Since the mounting surface 14a of the mounting plate 14 and the pressing surface 15a of the pressing plate 15 are flat surfaces, the screen 2 and the frame 3 immediately after the press bonding are kept flat. Further, since the screen 2 and the frame 3 have a temperature difference immediately after the press bonding, heat is transferred from the high-temperature screen 2 to the frame 3 through the adhesive, and as a result, the temperature of the frame 3 Becomes higher than room temperature. Here, since the acrylic two-component adhesive described above is an adhesive that cures within a few minutes after being mixed, the screen 2 and the frame 3 are bonded in a state having a temperature difference.

  After being left for several minutes in the pressurized state, for example, the gripping portion 16 is gripped by an apparatus or the like, the pressing plate 15 is moved upward, the pressurized state of the screen 2 and the frame 3 is released, and the pressure-bonded screen 2 is pressed. And the flame | frame 3 is taken out from the pressurization apparatus 10 (extraction process: S106). When the pressure-bonded screen 2 and frame 3 are allowed to stand at room temperature of 25 ° C., heat is released from the screen 2 and frame 3, and both the screen 2 and frame 3 reach 25 ° C. At this time, since the temperature of the screen 2 drops, a contraction force acts due to the temperature drop, and the screen 2 tries to shrink toward the inner side in the circumferential direction. On the other hand, since the frame 3 has high rigidity, it does not bend or shrink due to a temperature drop. For this reason, a tension acts between the frame 3 and the screen 2. However, since the frame 3 has high rigidity, the frame 2 can withstand the force that the screen 2 tries to shrink, and the state where the screen 2 is pulled outward by the frame 3 is maintained.

  After the screen 2 and the frame 3 reach room temperature, when the temperature of the screen 2 and the frame 3 changes with the temperature change of the room temperature, the screen 2 and the frame 3 expand or contract. However, the screen 2 and the frame 3 are made of the same material such as an aluminum alloy, and both are maintained at the same temperature, which is room temperature. For this reason, the expansion rate and the contraction rate of the screen 2 and the frame 3 are substantially the same, and the tension generated between the two is not changed so much by the temperature change. As a result, the screen 2 and the frame 3 can maintain a flat shape in a state where a constant tension acts between them. After the take-out step, a voice coil (not shown) is disposed on the back side of the screen 2 and the speaker device 1 is manufactured by attaching the magnetic circuit 4 to the frame 3 via the support member 5 from the back side. .

  In the speaker device 1 configured as described above, a tension is applied to the screen 2 using the thermal expansion and contraction of the screen 2, and the screen 2 is pulled outward in the circumferential direction. The screen 2 and the frame 3 are made of the same material such as an aluminum alloy. For this reason, the expansion rate and contraction rate of the screen 2 and the frame 3 due to temperature and humidity can be made substantially the same. For this reason, sufficient tension can be applied to the screen 2, and even when environmental conditions such as temperature and humidity change, the magnitude of the tension acting on the screen 2 can be prevented from changing. As a result, deterioration of the acoustic characteristics of the screen 2 can be prevented.

  Moreover, in the manufacturing method of the speaker apparatus 1, the frame 3 is crimped | bonded with respect to this screen 2 in the state which heated the screen 2 with the heater 13 and was thermally expanded, and is then left to stand at normal temperature. Here, in the state immediately after crimping, that is, in the state where there is a temperature difference between the screen 2 and the frame 3, the screen 2 is in a thermally expanded state. Tension does not work very much. On the other hand, in a state where several minutes have passed after the pressure bonding, that is, in a state where there is not much temperature difference between the screen 2 and the frame 3, the screen 2 tends to be thermally contracted. Will act. For this reason, the frame 3 can be attached to the screen 2 in a state where the screen 2 is expanded. Accordingly, it is possible to apply sufficient tension to the screen 2 and pull the screen 2 outward in the circumferential direction.

  In the method for manufacturing the speaker device 1, an acrylic two-component adhesive that is cured after several minutes when mixed with each other is used as the first adhesive and the second adhesive. Therefore, when the room temperature frame 3 is pressure-bonded to the heated screen 2, the screen 2 and the frame 3 are bonded before the temperature of the screen 2 reaches the same temperature as the frame 3. Accordingly, the screen 2 can be attached to the frame 3 in an expanded state, and a tension can be reliably applied to the screen 2 when the temperature becomes the same after curing. In addition, since the screen 2 and the frame 3 are made of the same material such as an aluminum alloy, even when the screen 2 and the frame 3 expand or contract due to a change in room temperature, the expansion rate and contraction rate of both are substantially the same. be able to. Therefore, a constant tension can be applied to the screen 2 without being affected by changes in the environment.

  Further, in the method for manufacturing the speaker device 1, the magnitude of the tension acting on the screen 2 can be adjusted depending on the heating conditions and materials of the screen 2. Specifically, the heating time of the screen 2, the heating temperature, the type of adhesive, the curing time, the thermal expansion coefficient of the screen 2 and the frame 3, the thermal contraction rate, and the direction or magnitude of the rigidity between the screen 2 and the frame 3 The tension acting on the screen 2 can be adjusted by changing the difference in height. For this reason, the tension acting on the screen 2 can be easily adjusted.

  Moreover, in the manufacturing method of the speaker apparatus 1, the mounting surface 14a of the mounting plate 14 and the pressing surface 15a of the pressing plate 15 have a flat surface. For this reason, the flat speaker apparatus 1 can be manufactured easily.

(Second Embodiment)
Hereinafter, a speaker device 1 and a manufacturing method thereof according to a second embodiment of the present invention will be described with reference to the drawings. In the present embodiment, since only the manufacturing method is different, the different parts will be mainly described. Note that, in the speaker device 1 and the manufacturing method thereof according to the second embodiment, portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted or simplified.

  FIG. 7 is a flowchart showing a method for manufacturing the speaker device 1 according to the second embodiment of the present invention. FIG. 8 shows that the screen 2 and the frame 3 are arranged between the convex plate 21 and the concave plate 22 of the pressure device 20 used for manufacturing the speaker device 1 according to the second embodiment of the present invention. It is a side view for demonstrating a process. FIG. 9 is a view showing a state in which the screen 2 and the frame 3 are pressurized by the pressure device 20 in FIG. FIG. 10 is a side view of the screen 2 and the frame 3 immediately after being taken out from the pressure device 20.

  The speaker device 1 according to the second embodiment of the present invention is manufactured using a pressurizing device 20 shown in FIG. This pressurizing device 20 is used for thermocompression bonding of the screen 2 and the frame 3. As shown in FIG. 8, the pressing device 20 includes a surface plate 11, a convex plate 21 disposed above the surface plate 11, and a concave plate for pressing an object placed on the convex plate 21. 22 and a gripping portion 16 for gripping the concave plate 22.

  As shown in FIG. 8, the convex plate 21 is disposed above the surface plate 11. When the convex plate 21 is viewed from the side, the convex plate 21 is provided with a convex surface 21a that bulges upward in a convex curved shape. The convex plate 21 can be made of, for example, aluminum, and its central portion protrudes upward by about 5 mm compared to the outer peripheral portion having the smallest thickness. The concave plate 22 is disposed so as to face the convex plate 21. When the concave plate 22 is viewed from the side, the concave plate 22 is provided with a concave surface 22a that is recessed upward in a concave curved surface shape. The concave plate 22 can be made of, for example, aluminum, and its central portion is formed to be recessed upward by about 5 mm as compared with the outer peripheral portion having the largest thickness. The gripping part 16 is fixed above the concave plate 22. The convex surface 21a of the convex plate 21 and the concave surface 22a of the concave plate 22 are formed in a convex shape and a concave shape corresponding to each other (for example, having the same curvature).

  When the speaker device 1 is manufactured, first, the same application as that of S101 described above is performed (application process: S201). Next, as shown in FIG. 8, the screen 2 coated with the first adhesive is placed on the convex surface 21a of the convex plate 21 so that the back side surface 2a faces upward (first mounting step). : S202).

  Further, the frame 3 coated with the second adhesive is positioned and placed above the screen 2 placed on the convex plate 21 so that the adhesive surfaces of the frames 3 overlap each other (second placement). Step: S203). This embodiment is different from the first embodiment in that the heating step (S103) is not performed after the first placement step (S202).

  Thereafter, the same pressure bonding as in S105 described above is performed (crimping step: S204). As described above, the convex surface 21a of the convex plate 21 and the concave surface 22a of the concave plate 22 are formed in a convex shape and a concave shape corresponding to each other. For this reason, when the concave plate 22 is pressed toward the convex plate 21, the screen 2 and the frame 3 receive a stress in the vertical direction from the convex surface 21a and the concave surface 22a, and are deformed into a bowed shape.

  Next, similarly to S106 described above, the pressure-bonded screen 2 and frame 3 are taken out from the pressure device 20 (extraction step: S206). As shown in FIG. 10, the screen 2 and the frame 3 immediately after being taken out from the pressurizing device 20 are maintained in a state of being bowed when viewed from the side. In this state, due to the bending rigidity and elasticity of the frame 3, a moment in the direction indicated by the arrow A is applied to the frame 3 to restore the original state. Accordingly, the screen 2 is pulled in the direction indicated by the arrow B shown in FIG. 10 and extends in the longitudinal direction. For this reason, when the frame 3 is restored to a flat state, the tensile stress in the direction indicated by the arrow B shown in FIG. In the present embodiment, the stress is applied only in the direction along the long side. However, it is preferable to apply the stress in the direction along the short side as well as the long side. Thereafter, as in the case of the first embodiment, the voice coil (not shown) and the magnetic circuit 4 are arranged to manufacture the speaker device 1.

  In the manufacturing method of the speaker device 1 configured as described above, the screen 2 and the frame 3 are pressed together in a state where the screen 2 and the frame 3 are warped. For this reason, a moment in the direction indicated by the arrow A, which attempts to restore the original state, acts on the frame 3 due to the elasticity and bending rigidity of the frame 3. Accordingly, the screen 2 is pulled in the direction indicated by the arrow B shown in FIG. 10 and extends in the longitudinal direction. Therefore, when the screen 2 and the frame 3 are restored to a flat state, a tensile stress in the direction indicated by the arrow B shown in FIG. For this reason, it is possible to apply sufficient tension to the screen 2 and pull the screen 2 outward in the circumferential direction.

  In the method for manufacturing the speaker device 1, the tension acting on the screen 2 can be adjusted by changing the tensile rigidity of the screen 2 and the bending rigidity and elasticity of the frame 3. For this reason, the tension acting on the screen 2 can be easily adjusted.

(Third embodiment)
Hereinafter, a speaker device 30 according to a third embodiment of the present invention will be described with reference to the drawings. Further, in the speaker device 30 according to the third embodiment, since only the frame configuration is different from the first and second embodiments, the frame configuration will be mainly described. Further, in the speaker device 30 according to the third embodiment, portions common to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 11 is a rear view of the speaker device 30 according to the third embodiment of the present invention. FIG. 12 is a cross-sectional view taken along line CC of the speaker device 30 according to the third embodiment of the present invention.

  As in the case of the first embodiment, the speaker device 30 includes a screen 2, a frame 31 that holds the screen 2, a magnetic circuit 4 that constitutes a part of a driving body that vibrates the screen 2, and a magnetic circuit 4. And a support member 5 that supports the frame 3. In FIGS. 11 and 12, the driver, the magnetic circuit 4, and the support member 5 are not shown.

  As shown in FIG. 11, the frame 31 has a substantially rectangular frame shape. The frame 31 has the same long side frames 6 and 6 and short side frames 7 and 7 as those in the first embodiment. The longitudinal side frame 6 of the present embodiment includes a longitudinal side plate portion 6a located on the left and right sides, and a pair of longitudinal upright plate portions extending in the same direction so as to face each other from both ends of the longitudinal side plate portion 6a. 6b. Similarly to the long side frame 6, the short side frame 7 has a short side plate portion 7 a and a short standing plate portion 7 b. A rectangular opening region 8 is formed at the center of the frame 3. Note that an aluminum alloy is adopted as the material of the frame 3. However, the material of the frame 3 is not limited to the aluminum alloy.

  In addition, two short beam-like members 32 and 32 that are pressure parts are arranged in the opening region 8 along the rectangular short direction. The short beam-like members 32, 32 are arranged so as to divide the opening region 8 into three along the longitudinal direction. As a result, divided areas 33, 34, and 35 are formed in the frame 31 so as to be divided into three parts, that is, left and right and the center. The divided areas 33 and 34 have the same width dimension in the longitudinal direction, and the divided area 35 has a dimension smaller than the width dimension of the divided areas 33 and 34. As shown in FIG. 12, the cross-sectional shape of the short beam-shaped member 32 is substantially T-shaped. Specifically, the short beam-shaped member 32 extends in a short plate direction in the form of a flat plate, and extends from the approximate center of the short flat beam portion 36 toward the front side. And a short girder portion 37 to be used. The short beam-like member 32 is disposed in the opening region 8 in such a manner that end surfaces of both end portions thereof are in contact with the long-side plate portion 6a of the opposed long-side frame 6.

  In the present embodiment, the dimension of the mounting interval H in the short direction in the frame 31 is, for example, 594 mm. On the other hand, the length of the short beam-like member 32 in the longitudinal direction is 594.2 mm. For this reason, in the state where the short beam-like member 32 is disposed in the opening region 8, both end portions press the long side plate portion 6 a of the long side frame 6 from the inside to the outside. That is, the short beam-like member 32 fulfills a function for applying a pressing force to the frame 31 outward in the short direction. In addition, the length dimension of the longitudinal direction of the short beam-shaped member 32 should just be larger than the dimension of the attachment space | interval H, and is not limited to 594.2 mm.

  In the divided region 33, two upper beam joints 40, 40 serving as pressurizing parts are arranged along the longitudinal direction at positions that are roughly divided into three in the short direction. Further, in the divided region 35, two medium beam joints 41, 41, which are pressure components, are arranged along the longitudinal direction at positions that are roughly divided into three in the short direction. Further, in the divided region 34, two lower beam joints 42 and 42, which are pressurizing parts, are arranged along the longitudinal direction at a position equally divided into three in the short direction. As shown in FIG. 11, the upper beam joints 40 and 40, the middle beam joints 41 and 41, and the lower beam joints 42 and 42 are arranged linearly so as to cross the inside of the opening region 8 in the longitudinal direction. ing. That is, the opening region 8 is divided into three regions in the left-right direction by the upper beam-shaped joints 40, 40, the middle beam-shaped joints 41, 41, and the lower beam-shaped joints 42, 42. Thus, the opening region 8 is divided into nine regions by the short beam-like members 32 and 32, the upper beam-like joints 40 and 40, the middle beam-like joints 41 and 41, and the lower beam-like joints 42 and 42. .

  The cross-sectional shapes of the upper beam joint 40, the middle beam joint 41, and the lower beam joint 42 are substantially T-shaped. Specifically, each of the upper beam-like joint 40, the middle beam-like joint 41, and the lower beam-like joint 42 includes a long flat beam portion 40a, 41a, 42a extending in a plate shape in the longitudinal direction, and a long flat beam portion. 40a, 41a, and 42a, and the longitudinal girder part 40b, 41b, and 42b extended toward the front side from the approximate center of the transversal direction. Further, the upper beam-shaped joint 40 has a stepped cutout portion 40c at the other end of the long flat beam portion 40a, in which a portion of the long flat beam portion 40a is cut out in a substantially L shape along the longitudinal direction. Is formed. Further, the intermediate beam-shaped joint 41 is formed with stepped notches 41c in which the portions of the long flat beam 41a are cut out in a substantially L shape along the longitudinal direction at both ends of the long flat beam 41a. Has been. Further, the lower beam-shaped joint 42 is formed with a step-shaped notch 42c in which a portion of the long flat beam 42a is cut out in a substantially L shape along the longitudinal direction at one end of the long flat beam 42a. Has been. As shown in FIG. 11, the upper beam-shaped joint 40 is bridged between the upper short-side frame 7 and the short beam-shaped member 32 disposed on the upper side. Specifically, the upper beam-like joint 40 has an end face on one end abutting on the short side plate portion 7a of the upper short side frame 7 and an end face on the other end side arranged on the upper side. It arrange | positions in the division | segmentation area | region 33 so that it may contact | connect the short beam part 37 of the shaped member 32. At this time, the short flat beam portion 36 of the short beam-like member 32 enters the notch 40c provided at the other end of the upper beam-like joint 40 (see FIG. 12).

  As shown in FIG. 11, the middle beam-like joint 41 is bridged between two short beam-like members 32. Specifically, the middle beam-shaped joint 41 is disposed in the divided region 35 so that each end surface thereof abuts against the opposing surfaces of the short beam portions 37 of the two short beam members 32. At this time, the short flat beam portion 36 of the short beam-like member 32 enters the notches 41c provided at both ends of the intermediate beam-like joint 41 (see FIG. 12). The lower beam-shaped joint 42 is bridged between the lower short-side frame 7 and the short beam-shaped member 32 disposed on the lower side. Specifically, the end face on the other end side of the lower beam joint 42 abuts on the short side plate portion 7a of the short side frame 7 on the lower side, and the end face on one end side thereof is disposed on the lower side. It arrange | positions in the division | segmentation area | region 34 so that the short beam part 37 of the short beam-shaped member 32 may contact | abut. At this time, the short flat beam portion 36 of the short beam-like member 32 enters the notch portion 42c provided at one end of the lower beam-like joint 42 (see FIG. 12).

  In the present embodiment, the dimension of the mounting interval J in the short direction in the divided regions 33 and 34 is, for example, 420.5 mm. On the other hand, the length dimension in the longitudinal direction of the upper beam joint 40 and the lower beam joint 42 is formed to be 420.6 mm. In addition, the length of the intermediate beam-shaped joint 41 is 147 mm, which is the same as the mounting interval K in the short direction of the divided region 35. Therefore, when the upper beam joint 40, the middle beam joint 41, and the lower beam joint 42 are disposed in the opening region 8, the upper end portion of the upper beam joint 40 and the lower end portion of the lower beam joint 42 are in the middle. Via the beam-shaped joint 41, the long side plate portion 7a of the short side frame 7 is pressed from the inside toward the outside. That is, the upper beam-shaped joint 40, the middle beam-shaped joint 41, and the lower beam-shaped joint 42 have a function for applying a pressing force to the frame 31 outward in the longitudinal direction. In addition, the length dimension of the longitudinal direction of the upper beam joint 40 and the lower beam joint 42 should just be larger than the dimension of the attachment space | interval J, and is not limited to 420.6 mm.

  In the present embodiment, the frame 31 first bonds the screen 2 to the long side frames 6 and 6 and the long side frames 7 and 7 formed in a frame shape. Then, after the adhesive is completely cured, the short beam-like member 32 is interposed along the short side direction of the long side frames 6 and 6 and the long side frames 7 and 7 formed in a frame shape. Thereafter, the upper beam joints 40, 40, the middle beam joints 41, 41 and the lower beam joints 42, 42 along the short direction of each of the divided regions 33, 34, 35 (longitudinal direction of the frame 31 in FIG. 11). Assembled by interposing.

  In the speaker device 30 configured as described above, the frame 31 can be pressed outward in the short direction by interposing the short beam-like member 32 in the opening region 8. Further, by interposing the upper beam-shaped joint 40, the middle beam-shaped joint 41, and the lower beam-shaped joint 42 in the opening region 8, the frame 31 can be pressed outward in the longitudinal direction. For this reason, it is possible to apply sufficient tension to the screen 2 and pull the screen 2 outward in the circumferential direction.

(Fourth embodiment)
Hereinafter, a speaker device 50 according to a fourth embodiment of the present invention will be described with reference to the drawings. Further, in the speaker device 50 according to the fourth embodiment, the short beam-like member 32 and the long side frame 6 as well as the upper beam-like joint 40 and the lower beam-like joint 42 are compared with the third embodiment. Since only the joining method with the short side frame 7 is different, the configuration of the joining method will be mainly described. Further, in the speaker device 50 according to the third embodiment, portions common to the first to third embodiments are denoted by the same reference numerals and description thereof is omitted or simplified.

  FIG. 13 is a cross-sectional view of the vicinity of the end portion of the short beam-like member 32 in the speaker device 50 according to the fourth embodiment of the present invention. 14 is a cross-sectional view of the short beam-like member 32 shown in FIG.

  In the speaker device 50 according to the present embodiment, the frame 51 includes two long side frames 6 and 6, short side frames 7 and 7, short beam-like members 32, respectively, as in the third embodiment. 32, upper beam joints 40, 40, middle beam joints 41, 41 and lower beam joints 42, 42 are provided. In the present embodiment, the short beam-like member 32 is formed with a length shorter than the mounting interval H. Further, the upper beam joint 40 and the lower beam joint 42 are also formed with a length shorter than the mounting interval J. The intermediate beam-shaped joint 32 is formed to have the same length as the mounting interval K.

  As shown in FIGS. 13 and 14, the end portion of the short beam-like member 32 is not in contact with the long-side plate portion 6 a of the long-side frame 6. A pair of long holes 52 (see FIG. 16) are formed in the vicinity of the ends of the short flat beam portions 36 on both sides across the short cross beam portion 37, and screws 53 are inserted into the long holes 52, The end of the short beam-like member 32 is fixed to the long side frame 6 by screwing the tip of the screw 53 into the rear long vertical plate portion 6 b. The short beam-like member 32 can be moved relative to the long side frame 6 by moving the screw portion 53 a of the screw 53 in the long hole 52.

  As shown in FIG. 14, holding members 54 and 54 having a substantially rectangular parallelepiped shape are disposed on both sides of the short cross beam portion 37 in the vicinity of the end portion of the short flat beam portion 36. In addition, two circular holes 55 are provided in a portion of the short flat beam portion 36 sandwiched by the holding member 54 so as to be aligned in the front and back direction. Each holding member 54, 54 is also provided with two screw holes 54a, 54a at positions corresponding to the circular hole 55 in the vertical direction. Specifically, the holding member 54 is disposed on the short beam portion 36 in a state where the screw holes 54a and 54a and the circular holes 55 and 55 are aligned. Then, as shown in FIG. 14, screws 56 are screwed into the two screw holes 54 a of the upper holding member 54. Then, the screw 56 passes through the circular hole 55 and is screwed into the screw hole 54a of the holding member 54 disposed below. In this way, the holding member 54 is fixed to the short flat beam portion 36.

  Further, as shown in FIGS. 13 and 14, the holding member 54 is provided with a screw hole 54 b penetrating in the left-right direction. The screw hole 54b is located between the two screws 56 and 56 screwed into the holding member 54 in the front and back direction. A pressing screw 57 is inserted into the screw hole 54b. The front end of the pressing screw 57 is brought into contact with the long-side plate portion 6a of the long-side frame 6 and the long-side plate portion 6a is pressed by the pressing screw 57, whereby the frame 51 can be pressed in the left-right direction. Such a configuration for pressing (hereinafter referred to as a screw pressing mechanism) may be provided only on either the left or right side of the short beam-like member 32, but the left and right sides of the short beam-like member 32 may be provided. It is preferable to provide at both ends.

  Similarly to the short beam member 32, the above-described screw pressing mechanism is provided at an end portion on the side where the upper beam joint 40 and the lower beam joint 42 are in contact with the short frame 7. Note that the above-described screw pressing mechanism may be provided also at an end portion on the side where the upper beam-shaped joint 40 and the lower beam-shaped joint 42 are in contact with the short beam-shaped member 32. As described above, the screw pressing mechanism performs a function of applying a pressing force to the frame 31 outwardly through the short beam-shaped member 32, the upper beam-shaped joint 40, and the lower beam-shaped joint 42. . Furthermore, the above-described screw pressing mechanism may be applied to the intermediate beam-shaped joint 41.

  In the speaker device 50 configured as described above, the short beam-shaped member 32, the upper beam-shaped joint 40, the middle beam-shaped joint 41, and the lower beam-shaped joint 42 are interposed in the opening region 8, and the short beam-shaped member. The frame 31 is shortened by the pressing screw 57 by providing a screw pressing mechanism at both ends of 32 and the ends of the upper beam joint 40 and the lower beam joint 42 on the side in contact with the short side frame 7. It can be pressed outward in the hand direction and outward in the longitudinal direction. For this reason, it is possible to apply sufficient tension to the screen 2 and pull the screen 2 outward in the circumferential direction.

  Further, in the speaker device 50, long holes 52 are formed in the short flat beam portion 36 of the short beam-shaped member 32, and the long beam portions 40 b and 42 b of the upper beam-shaped joint 40 and the lower beam-shaped joint 42. Therefore, the positions of the short beam-shaped member 32, the upper beam-shaped joint 40, and the lower beam-shaped joint 42 can be adjusted. Therefore, it is possible to adjust the pressing force on the frame 51 by adjusting the position of the short beam-like member 32, the upper beam-like joint 40 and the lower beam-like joint 42, and adjusting the insertion amount of the pressing screw 57. Become. Further, the pressing force on the frame 51 can be adjusted by an easy operation such as adjusting the amount of insertion of the pressing screw 57.

(Fifth embodiment)
Hereinafter, a speaker device 60 according to a fifth embodiment of the present invention will be described with reference to the drawings. Further, in the speaker device 60 according to the fifth embodiment, only the configuration of the mechanism that presses the frame 61 is different from that of the fourth embodiment, and thus the difference will be mainly described. Further, in the speaker device 60 according to the fifth embodiment, portions common to the first to fourth embodiments are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 15 is a cross-sectional view of the vicinity of the end portion of the short beam-like member 32 in the speaker device 60 according to the fifth embodiment of the present invention. 16 is a cross-sectional view of the short beam-like member 32 shown in FIG.

  As shown in FIGS. 15 and 16, in the speaker device 60 according to the present embodiment, the pressing screw 57 used for pressing the long side frame 6 in the screw pressing mechanism of the fourth embodiment is used. Instead, a pressing spring 62 serving as an elastic member is used. Specifically, the pressing spring 62 is interposed between the holding member 54 and the long side plate portion 6 a of the long side frame 6. The pressing spring 62 presses the long side plate portion 6a of the long side frame 6 outward, so that the frame 51 can be urged (pressed) outward in the left-right direction. Note that such a structure for pressing (hereinafter referred to as a spring pressing mechanism) may be provided on either the left or right side of the short beam-like member 32, but the right and left sides of the short beam-like member 32 may be provided. It is preferable to provide at both ends.

  Similarly to the short beam member 32, the above-described spring pressing configuration is also provided at the end portion on the side where the upper beam joint 40 and the lower beam joint 42 are in contact with the short frame 7. Note that the above-described spring pressing mechanism may be provided at the end portion on the side where the upper beam-like joint 40 and the lower beam-like joint 42 are in contact with the short beam-like member 32. Thus, the spring pressing mechanism performs a function for applying a pressing force to the frame 31 through the short beam-shaped member 32, the upper beam-shaped joint 40, and the lower beam-shaped joint 42 in the outward direction. . Furthermore, the above-described spring pressing mechanism may be applied to the intermediate beam-shaped joint 41. Further, in order to improve the assemblability, the holding member 54 may be provided with a support shaft that is located on the center side of the pressing spring 62 and shorter than when the pressing spring 62 is pressed.

  In the speaker device 60 configured as described above, the short beam-shaped member 32, the upper beam-shaped joint 40, the middle beam-shaped joint 41, and the lower beam-shaped joint 42 are interposed in the opening region 8, and the short beam-shaped member is formed. 32, by providing a spring pressing mechanism at both ends of the upper beam-like joint 40 and the lower beam-like joint 42 on the side in contact with the short-side frame 7, 31 can be pressed outward in the lateral direction and outward in the longitudinal direction. For this reason, it is possible to apply sufficient tension to the screen 2 and pull the screen 2 outward in the circumferential direction.

  Further, in the speaker device 60, long holes 52 are formed in the short flat beam portion 36 of the short beam-shaped member 32, and the long beam portions 40 b and 42 b of the upper beam-shaped joint 40 and the lower beam-shaped joint 42. Therefore, the positions of the short beam-shaped member 32, the upper beam-shaped joint 40, and the lower beam-shaped joint 42 can be adjusted. Therefore, it is possible to adjust the pressing force on the frame 51 by adjusting the position of the short beam-like member 32, the upper beam-like joint 40 and the lower beam-like joint 42, and adjusting the spring constant of the pressing spring 62. Become. Further, even when a dimensional difference occurs between the short beam-shaped member 32, the upper beam-shaped joint 40 and the lower beam-shaped joint 42, and the long-side frame 6 and the short-side frame 7, it easily acts on the screen 2. The tension can be adjusted.

(Sixth embodiment)
Hereinafter, a speaker device 70 according to a sixth embodiment of the present invention will be described with reference to the drawings. Further, in the speaker device 70 according to the sixth embodiment, since only the frame configuration is different from the first to fifth embodiments, the configuration of the frame will be mainly described. Also, in the speaker device 70 according to the sixth exemplary embodiment, portions common to the first to fifth exemplary embodiments are denoted by the same reference numerals and description thereof is omitted or simplified.

  FIG. 17 is a rear view of the speaker device 70 according to the sixth embodiment of the present invention. 18 is a cross-sectional view of the speaker device 70 according to the sixth embodiment of the present invention, taken along the line FF in FIG.

  As in the case of the first embodiment, the speaker device 70 includes a screen 2, a frame 71 that holds the screen 2, a magnetic circuit 4 that constitutes a part of a driving body that vibrates the screen 2, and a magnetic circuit 4. And a support member 5 that supports the frame 3. 17 and 18, the driver, the magnetic circuit 4 and the support member 5 are not shown.

  As shown in FIG. 17, the frame 71 has a substantially rectangular frame shape. The frame 71 includes long side frames 6 and 6 and short side frames 7 and 7. The longitudinal side frame 6 has a longitudinal side plate portion 6a located on the left and right sides and a longitudinal upright plate portion 6b. Similarly to the long side frame 6, the short side frame 7 has a short side plate portion 7 a and a short standing plate portion 7 b. An opening region 8 is formed at the center of the frame 3.

  In addition, two short beam support members 72 and 72 are disposed in the opening region 8 so as to cross the frame 71 in the short direction. The short beam support members 72, 72 are arranged so as to divide the opening region 8 into approximately three along the longitudinal direction. Further, on the inner side surface of the long side plate portion 6a in the long side frame 6, two beam supports 73 each having a concave section 73a having a concave cross section are provided at positions where the long side frame 6 is divided into approximately three equal parts along the longitudinal direction. One is arranged. Specifically, the recess 73a is formed so as to be cut out in a substantially L shape from the back side of the beam support 73 toward the center of the frame 71 (see FIG. 18). Then, both ends of the short beam support member 72 are inserted into the recesses 73a and 73a of the beam support 73 arranged to face each other. As described above, the both ends of the two short beam support members 72 are inserted into the recesses 73a and 73a, so that the short beam support members 72 maintain a state in which they are bowed outward in the vertical direction. .

  In addition, two longitudinal beam support members 74 and 74 are disposed in the opening region 8 so as to cross the frame 71 in the longitudinal direction. The longitudinal beam support members 74 and 74 are disposed so as to divide the opening region 8 into three substantially along the short direction. Further, on the inner side surface of the short side plate portion 7a in the short side frame 7, the beam support 73 having the above-described concave portion 73a at a position where the short side frame 7 is divided into approximately three equal parts along the short direction. Are arranged. Then, both ends of the longitudinal beam support member 74 are inserted into the concave portions 73a and 73a of the beam support body 73 arranged to face each other. Thus, the both ends of the two longitudinal beam support members 74 are inserted into the recesses 73a and 73a, so that the longitudinal beam support members 74 are maintained in a state of being bowed toward the outer side in the left-right direction.

  Thus, since the short beam support member 72 and the long beam support member 74 are arranged on the frame 71 in a state of being bowed, the short beam support member 72 and the long beam support member 74 are in a state of being bowed. Try to restore from the original state. This restoring force acts as a pressing force that presses the frame 71 in the lateral direction and the longitudinal direction. That is, the short beam support member 72 and the long beam support member 74 are members for applying a pressing force to the frame 71 in the short direction and the long direction. The short beam support member 72 and the long beam support member 74 can be formed of a metal such as aluminum or iron, for example.

  Further, spring members 75 and 76 serving as two connecting members are arranged so as to intersect each other in a region surrounded by the two short beam support members 72 and the long beam support member 74. The spring member 75 is disposed along the longitudinal direction, and both ends thereof are connected to the short beam support members 72 and 72. That is, the spring member 75 is bridged between the short beam support members 72 and 72. The spring member 75 pulls the short beam support members 72 and 72 inward in the vertical direction by its own tensile force. For this reason, each short beam support member 72 and 72 receives force in the direction in which the curvature is corrected. As a result, both ends of the short beam support members 72, 72 press the beam support 73 outward in the left-right direction with a greater force.

  On the other hand, the spring member 76 is disposed along the short direction, and both ends thereof are connected to the long beam support members 74 and 74. That is, the spring member 76 is bridged between the longitudinal beam support members 74 and 74. The spring member 76 pulls the longitudinal beam support members 74 and 74 inward in the left-right direction by its own tensile force. For this reason, each longitudinal beam support member 74 and 74 receives force in the direction in which the curvature is corrected. As a result, both ends of the longitudinal beam support members 74 and 74 press the beam support 73 outward in the vertical direction with a greater force.

  In the speaker device 70 configured as described above, the frame 71 is moved out of the lateral direction by interposing the short beam support members 72 and 72 and the long beam support members 74 and 74 that are warped in the bow in the frame 71. And outward in the longitudinal direction. For this reason, it is possible to apply sufficient tension to the screen 2 and pull the screen 2 outward in the circumferential direction.

  Further, in the speaker device 70, the spring members 75 and 76 are arranged so as to intersect with a region surrounded by the short beam support member 72 and the long beam support member 74. For this reason, it is possible to apply a force to the short beam support members 72 and 72 and the long beam support members 74 and 74 in a direction to correct the warpage. Therefore, the frame 71 can be pressed with a greater force toward the outer side in the lateral direction and the outer side in the longitudinal direction. As a result, it is possible to apply sufficient tension to the screen 2 and reliably pull the screen 2 outward in the circumferential direction.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented in various modifications.

  In each of the above-described embodiments, the speaker devices 1, 30, 50, 60, and 70 are speaker devices in which only one driving body is disposed inside the frames 2, 31, 51, 61, and 71. Two or more driving bodies may be arranged. Moreover, it is good also as the large sized speaker apparatus 1, 30, 50, 60, 70 which has two or more opening area | regions 8. FIG. Furthermore, it is good also as the large sized speaker apparatus 1,30,50,60,70 formed by joining the speaker apparatus 1,30,50,60,70.

  In the first and second embodiments described above, the first adhesive and the second adhesive used in manufacturing the speaker device 1 are two-liquid mixed adhesives. The first adhesive and the second adhesive are not limited to the two-component mixed adhesive.

  Moreover, in the above-mentioned 2nd Embodiment, in the pressurization apparatus 20 used in the case of manufacture of the speaker apparatus 1, let the mounting board arrange | positioned above a surface plate be the convex board 21 which has convex shape, The pressing plate for pressing the object is a concave plate 22 having a concave shape, but is not limited to such a configuration, for example, conversely, the mounting plate is a concave plate having a concave shape, The pressing plate may be a convex plate having a convex shape.

  In the second, third, and fourth embodiments described above, each of the short beam-like member 32, the upper beam-like joint 40, the middle beam-like joint 41, and the lower beam-like joint 42 is disposed. However, the number of each of the short beam-shaped member 32, the upper beam-shaped joint 40, the middle beam-shaped joint 41, and the lower beam-shaped joint 42 is not limited to two, but may be one or three. It is good also as above.

  In the second, third, and fourth embodiments described above, the short beam-like member 32, the upper beam-like joint 40, the middle beam-like joint 41, and the lower beam-like joint 42 are connected to the short-side beam portion 37 and the long-side beam. Although the ends of the girder portions 40b, 41b, 42b are arranged so as to face the back surface of the screen 2, the arrangement is not limited to this arrangement, and the short beam-like member 32, the upper beam-like joint 40, the middle The beam-like joint 41 and the lower beam-like joint 42 may be arranged so that the short flat beam portion 36 and the long flat beam portions 40 a, 41 a, 42 a face the back surface of the screen 2.

  In the fourth embodiment described above, the frame 51 is pressed by the two pressing screws 57, but the number of pressing screws 57 for pressing the frame 51 is not limited to two. The number may be one, or three or more. In the fifth embodiment described above, the frame 61 is pressed by the two pressing springs 62, but the number of pressing springs 62 for pressing the frame 61 is not limited to two. One may be used, or three or more.

  Further, in the above-described sixth embodiment, the short beam support members 72 and 72 and the long beam support members 74 and 74 are bent in a bow toward the outer side in the circumferential direction with respect to the frame 71. The direction of bowing is not limited to the outer side in the circumferential direction. For example, the bow may be bent toward the inner side in the lateral direction or the inner side in the longitudinal direction. In this case, compression springs can be used as the spring members 75 and 76. Further, the spring members 75 and 76 may be constituted by other urging members such as rubber.

1, 30, 50, 60, 70 ... Speaker device 2 ... Screen (diaphragm)
3, 31, 51, 61, 71 ... Frame 4 ... Magnetic circuit 13 ... Heater (heating means)
14 ... Mounting plate 15 ... Pressing plate 21 ... Convex plate (mounting plate)
22 ... concave plate (pressing plate)
32 ... Short beam-like member (beam-like member, pressurized part)
40 ... Upper beam joint (beam member, pressurized part)
41 ... Medium beam joint (beam member, pressurized part)
42 ... Lower beam joint (beam member, pressurized part)
57 ... Pressing screw (screw member)
62 ... Pressing spring (elastic member)
72 ... Short beam support member (beam-like member, pressure component)
74: Longitudinal beam support member (beam-like member, pressure component)
75, 76 ... Spring member (connection member)
H ... Mounting interval (interval)
J: Mounting interval (interval)
K ... Mounting interval (interval)

Claims (11)

A planar diaphragm;
A frame for holding the diaphragm on a surface opposite to a flat surface exposed to the outside of the diaphragm;
A driving body for driving the screen in a direction of contacting and separating from the frame;
A speaker device comprising:
In order to maintain the diaphragm on a flat surface, the speaker is characterized in that the diaphragm is stretched on the frame so that a tension acts on the diaphragm outward in the circumferential direction. . The speaker device according to claim 1, wherein
The speaker device according to claim 1, wherein the tension acting on the diaphragm is generated by thermally expanding or contracting one or both of the diaphragm and the frame. The speaker device according to claim 1, wherein
In order to apply the tension to the diaphragm, the frame is warped in a bow shape, and the restoring force of the frame when the frame returns from the state along the bow shape to the original state is used. Speaker device. The speaker device according to claim 1, wherein
Inside the frame, pressure parts are arranged in a form spanned between the frames, and both ends of the pressure parts press the inner peripheral edge of the frame outward in the circumferential direction. A speaker device, wherein tension acts on the diaphragm. The speaker device according to claim 4, wherein
The speaker device according to claim 1, wherein the pressure member is a beam-like member having a size larger than the interval between the frames to be spanned within a range of 0.5% or less with respect to the interval. The speaker device according to claim 4 or 5,
In addition to the beam-shaped member, the pressure member includes a screw member that is interposed between an end portion of the beam-shaped member and the frame and presses the frame outward in the circumferential direction. Speaker device. The speaker device according to claim 4 or 5,
In addition to the beam-shaped member, the pressure member includes an elastic member that is interposed between an end portion of the beam-shaped member and the frame and presses the frame outward in the circumferential direction. Speaker device. The speaker device according to claim 5, wherein
The speaker device, wherein the beam-like member is bridged between the frames in a bow shape. The speaker device according to claim 5, wherein
The beam members are bridged in a pair in a state of bowing in opposite directions between the frames, and a connection for correcting the warpage of both beam members between the beam members. A speaker device comprising a member. In a method for manufacturing a speaker device that emits sound by vibrating a planar diaphragm held by a frame,
Applying a first adhesive to one surface of the diaphragm and applying a second adhesive to one surface of the frame that faces the diaphragm;
The vibration plate coated with the first adhesive is placed on the mounting plate having a flat plate shape heated by the heating means so that the surface opposite to the one surface faces the mounting plate. A process of placing on,
Leaving the diaphragm placed on the mounting plate for a predetermined time and heating the diaphragm;
Placing the frame coated with the second adhesive on the diaphragm so that one surface thereof faces one surface of the diaphragm; and
A step of pressing the frame placed on the diaphragm with a pressing plate having a flat plate shape from above, and crimping the diaphragm and the frame;
A step of releasing the pressing after leaving the diaphragm and the frame in a pressure-bonded state for a predetermined time;
A method for manufacturing a speaker device, comprising: In a method for manufacturing a speaker device that emits sound by vibrating a planar diaphragm held by a frame,
Applying a first adhesive to one surface of the diaphragm and applying a second adhesive to one surface of the frame that faces the diaphragm;
The vibration in which the first adhesive is applied on a mounting plate having a mounting surface whose convex surface bulges upward in a curved shape or concave in a curved shape downward. Placing the plate such that the surface opposite to the one surface faces the placement plate;
Placing the frame coated with the second adhesive on the diaphragm so that one surface thereof faces one surface of the diaphragm; and
The frame placed on the diaphragm is pressed from above with a pressing plate whose pressing surface is formed in a concave shape corresponding to the convex shape or a convex shape corresponding to the concave shape, respectively. And a step of pressure-bonding the diaphragm and the frame;
A step of releasing the pressing after leaving the diaphragm and the frame in a pressure-bonded state for a predetermined time;
A method for manufacturing a speaker device, comprising:

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